diff --git a/package.json b/package.json
index d3e5592..c922610 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,7 @@
   },
   "dependencies": {
     "common-spectrum": "^1.0.2",
+    "ensure-string": "^1.2.0",
     "ml-array-max": "^1.2.4",
     "ml-array-mean": "^1.1.6",
     "papaparse": "^5.3.2",
diff --git a/src/from/__tests__/__snapshots__/fromBelsorpCSV.test.js.snap b/src/from/__tests__/__snapshots__/fromBelsorpCSV.test.js.snap
new file mode 100644
index 0000000..ad16731
--- /dev/null
+++ b/src/from/__tests__/__snapshots__/fromBelsorpCSV.test.js.snap
@@ -0,0 +1,977 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`fromBelsorpCSV belsorp.csv 1`] = `
+Array [
+  Object {
+    "dataType": "Adsorption Isotherm",
+    "meta": Object {
+      "Adsorption temperature": "77.000 [K]",
+      "Adsorptive": "N2",
+      "Adsorptive cross section area": "0.1620 [nm^2]",
+      "Apparatus temperature": "0.0000 [C]",
+      "COMMENT1": "Standard 1",
+      "COMMENT2": "dsun",
+      "COMMENT3": "",
+      "COMMENT4": ", Vacuum degree before measurement:1.111E-4Pa",
+      "Date of measurement": "18/02/06",
+      "Dead volume": "30.402 [cm^3]",
+      "Equilibrium time": "0 [SEC]",
+      "File Name": "Act Carbon 2018 A.DAT",
+      "File name of wall adsorption": "",
+      "Number of adsorption data point :": "48",
+      "Number of desorption data point :": "34",
+      "Sample weight": "8.1300E-02 [g]",
+      "Saturated vapor pressure": "100.000 [kPa]",
+      "Serial number": "00463",
+      "Standard volume": "24.502 [cm^3]",
+      "Time of measurement": "30:25:37",
+      "Version": "",
+      "Wall adsorption correction value1": "",
+      "Wall adsorption correction value2": "",
+    },
+    "title": "Standard 1",
+    "variables": Object {
+      "p": Object {
+        "data": Array [
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+        ],
+        "isMonotone": true,
+        "label": "Relative pressure",
+        "max": 100,
+        "min": 100,
+        "units": "kPa",
+        "variable": "p0",
+      },
+      "x": Object {
+        "data": Array [
+          0.00002519,
+          0.000053514,
+          0.00012073,
+          0.00029799,
+          0.0012932,
+          0.0017461,
+          0.0026076,
+          0.0054841,
+          0.0078345,
+          0.010417,
+          0.015887,
+          0.021483,
+          0.04261,
+          0.058021,
+          0.073734,
+          0.089467,
+          0.1105,
+          0.1382,
+          0.1682,
+          0.2097,
+          0.2616,
+          0.3141,
+          0.355,
+          0.4004,
+          0.4518,
+          0.502,
+          0.552,
+          0.6016,
+          0.6512,
+          0.7004,
+          0.7488,
+          0.7965,
+          0.8417,
+          0.8512,
+          0.8841,
+          0.8946,
+          0.8989,
+          0.9184,
+          0.927,
+          0.9322,
+          0.9382,
+          0.9413,
+          0.9436,
+          0.945,
+          0.9464,
+          0.9485,
+          0.9495,
+          0.9502,
+        ],
+        "isMonotone": true,
+        "label": "p/p0",
+        "max": 0.9502,
+        "min": 0.00002519,
+        "units": "",
+        "variable": "p/p0",
+      },
+      "y": Object {
+        "data": Array [
+          0.000022289,
+          0.000044887,
+          0.00010545,
+          0.00025223,
+          0.00038821,
+          0.00040127,
+          0.00041572,
+          0.00043709,
+          0.00044646,
+          0.00045753,
+          0.00046899,
+          0.00047417,
+          0.00048363,
+          0.00048831,
+          0.00049304,
+          0.00049674,
+          0.00050272,
+          0.00051142,
+          0.00052507,
+          0.00055171,
+          0.00060275,
+          0.00066873,
+          0.00059409,
+          0.00062153,
+          0.00064272,
+          0.0006607,
+          0.00068386,
+          0.00071687,
+          0.00076635,
+          0.00083787,
+          0.0009399,
+          0.0010829,
+          0.0013107,
+          0.0013923,
+          0.0017455,
+          0.0019372,
+          0.0020646,
+          0.0026912,
+          0.0031789,
+          0.003597,
+          0.0042866,
+          0.0048782,
+          0.0054185,
+          0.005928,
+          0.006388,
+          0.0072107,
+          0.0079749,
+          0.0087115,
+        ],
+        "isMonotone": false,
+        "label": "Amount of absorbed gas",
+        "max": 0.0087115,
+        "min": 0.000022289,
+        "units": "mol/g",
+        "variable": "na",
+      },
+    },
+  },
+  Object {
+    "dataType": "Desorption Isotherm",
+    "meta": Object {
+      "Adsorption temperature": "77.000 [K]",
+      "Adsorptive": "N2",
+      "Adsorptive cross section area": "0.1620 [nm^2]",
+      "Apparatus temperature": "0.0000 [C]",
+      "COMMENT1": "Standard 1",
+      "COMMENT2": "dsun",
+      "COMMENT3": "",
+      "COMMENT4": ", Vacuum degree before measurement:1.111E-4Pa",
+      "Date of measurement": "18/02/06",
+      "Dead volume": "30.402 [cm^3]",
+      "Equilibrium time": "0 [SEC]",
+      "File Name": "Act Carbon 2018 A.DAT",
+      "File name of wall adsorption": "",
+      "Number of adsorption data point :": "48",
+      "Number of desorption data point :": "34",
+      "Sample weight": "8.1300E-02 [g]",
+      "Saturated vapor pressure": "100.000 [kPa]",
+      "Serial number": "00463",
+      "Standard volume": "24.502 [cm^3]",
+      "Time of measurement": "30:25:37",
+      "Version": "",
+      "Wall adsorption correction value1": "",
+      "Wall adsorption correction value2": "",
+    },
+    "title": "Standard 1",
+    "variables": Object {
+      "p": Object {
+        "data": Array [
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          undefined,
+        ],
+        "isMonotone": false,
+        "label": "Relative pressure",
+        "max": 100,
+        "min": 100,
+        "units": "kPa",
+        "variable": "p0",
+      },
+      "x": Object {
+        "data": Array [
+          0.9453,
+          0.9401,
+          0.9355,
+          0.9302,
+          0.9242,
+          0.9171,
+          0.91,
+          0.9023,
+          0.881,
+          0.8572,
+          0.8491,
+          0.8041,
+          0.7963,
+          0.7502,
+          0.6992,
+          0.6484,
+          0.5981,
+          0.5478,
+          0.4981,
+          0.4483,
+          0.3985,
+          0.3488,
+          0.2991,
+          0.2368,
+          0.2064,
+          0.1515,
+          0.1229,
+          0.099338,
+          0.080461,
+          0.066185,
+          0.051949,
+          0.037806,
+          0.02102,
+          0.014369,
+          undefined,
+        ],
+        "isMonotone": true,
+        "label": "p/p0",
+        "max": 0.9453,
+        "min": 0.014369,
+        "units": "",
+        "variable": "p/p0",
+      },
+      "y": Object {
+        "data": Array [
+          0.0082783,
+          0.0072084,
+          0.0062144,
+          0.0052137,
+          0.0043358,
+          0.0036074,
+          0.0029867,
+          0.002568,
+          0.0018215,
+          0.0014289,
+          0.00134,
+          0.0010485,
+          0.0010128,
+          0.00086486,
+          0.0007548,
+          0.00068038,
+          0.00063005,
+          0.00060302,
+          0.00058049,
+          0.00056955,
+          0.00054921,
+          0.00051936,
+          0.00048032,
+          0.00043257,
+          0.0004195,
+          0.00041188,
+          0.00041282,
+          0.00041751,
+          0.00042107,
+          0.000423,
+          0.00042577,
+          0.00042812,
+          0.00042641,
+          0.00042234,
+          undefined,
+        ],
+        "isMonotone": false,
+        "label": "Amount of absorbed gas",
+        "max": 0.0082783,
+        "min": 0.00041188,
+        "units": "mol/g",
+        "variable": "na",
+      },
+    },
+  },
+]
+`;
+
+exports[`fromBelsorpCSV belsorp2.csv 1`] = `
+Array [
+  Object {
+    "dataType": "Adsorption Isotherm",
+    "meta": Object {
+      "Adsorption temperature": "77 [K]",
+      "Adsorptive": "N2",
+      "Adsorptive cross section area": "0.162 [nm^2]",
+      "Apparatus temperature": "0 [C]",
+      "COMMENT1": "Standard 1",
+      "COMMENT2": "dsun",
+      "COMMENT3": "",
+      "COMMENT4": ", Vacuum degree before measurement:1.111E-4Pa",
+      "Date of measurement": "18.02.06",
+      "Dead volume": "30.402 [cm^3]",
+      "Equilibrium time": "0 [SEC]",
+      "File Name": "Act Carbon 2018 A.DAT",
+      "File name of wall adsorption": "",
+      "Number of adsorption data point :": "48",
+      "Number of desorption data point :": "34",
+      "Sample weight": "8.13E-02 [g]",
+      "Saturated vapor pressure": "100 [kPa]",
+      "Serial number": "463",
+      "Standard volume": "24.502 [cm^3]",
+      "Time of measurement": "30:25:37",
+      "Version": "",
+      "Wall adsorption correction value1": "",
+      "Wall adsorption correction value2": "",
+    },
+    "title": "Standard 1",
+    "variables": Object {
+      "p": Object {
+        "data": Array [
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+        ],
+        "isMonotone": true,
+        "label": "Relative pressure",
+        "max": 100,
+        "min": 100,
+        "units": "kPa",
+        "variable": "p0",
+      },
+      "x": Object {
+        "data": Array [
+          0.0000252,
+          0.0000535,
+          0.000121,
+          0.000298,
+          0.00129,
+          0.00175,
+          0.00261,
+          0.00548,
+          0.00783,
+          0.0104,
+          0.0159,
+          0.0215,
+          0.0426,
+          0.058,
+          0.0737,
+          0.0895,
+          0.1105,
+          0.1382,
+          0.1682,
+          0.2097,
+          0.2616,
+          0.3141,
+          0.355,
+          0.4004,
+          0.4518,
+          0.502,
+          0.552,
+          0.6016,
+          0.6512,
+          0.7004,
+          0.7488,
+          0.7965,
+          0.8417,
+          0.8512,
+          0.8841,
+          0.8946,
+          0.8989,
+          0.9184,
+          0.927,
+          0.9322,
+          0.9382,
+          0.9413,
+          0.9436,
+          0.945,
+          0.9464,
+          0.9485,
+          0.9495,
+          0.9502,
+        ],
+        "isMonotone": true,
+        "label": "p/p0",
+        "max": 0.9502,
+        "min": 0.0000252,
+        "units": "",
+        "variable": "p/p0",
+      },
+      "y": Object {
+        "data": Array [
+          195.26,
+          178.75,
+          161.62,
+          143.18,
+          132.87,
+          121.45,
+          109.34,
+          96.079,
+          80.623,
+          71.252,
+          60.32,
+          46.276,
+          43.42,
+          39.124,
+          31.207,
+          29.378,
+          24.273,
+          21.067,
+          18.78,
+          17.177,
+          16.068,
+          15.328,
+          14.809,
+          14.406,
+          13.931,
+          13.316,
+          14.989,
+          13.51,
+          12.366,
+          11.769,
+          11.463,
+          11.268,
+          11.134,
+          11.051,
+          10.945,
+          10.84,
+          10.628,
+          10.512,
+          10.255,
+          10.007,
+          9.797,
+          9.318,
+          8.994,
+          8.7014,
+          5.6535,
+          2.3636,
+          1.0061,
+          0.4996,
+        ],
+        "isMonotone": false,
+        "label": "Amount of absorbed gas",
+        "max": 195.26,
+        "min": 0.4996,
+        "units": "cm^3(STP)/g",
+        "variable": "Va",
+      },
+    },
+  },
+  Object {
+    "dataType": "Desorption Isotherm",
+    "meta": Object {
+      "Adsorption temperature": "77 [K]",
+      "Adsorptive": "N2",
+      "Adsorptive cross section area": "0.162 [nm^2]",
+      "Apparatus temperature": "0 [C]",
+      "COMMENT1": "Standard 1",
+      "COMMENT2": "dsun",
+      "COMMENT3": "",
+      "COMMENT4": ", Vacuum degree before measurement:1.111E-4Pa",
+      "Date of measurement": "18.02.06",
+      "Dead volume": "30.402 [cm^3]",
+      "Equilibrium time": "0 [SEC]",
+      "File Name": "Act Carbon 2018 A.DAT",
+      "File name of wall adsorption": "",
+      "Number of adsorption data point :": "48",
+      "Number of desorption data point :": "34",
+      "Sample weight": "8.13E-02 [g]",
+      "Saturated vapor pressure": "100 [kPa]",
+      "Serial number": "463",
+      "Standard volume": "24.502 [cm^3]",
+      "Time of measurement": "30:25:37",
+      "Version": "",
+      "Wall adsorption correction value1": "",
+      "Wall adsorption correction value2": "",
+    },
+    "title": "Standard 1",
+    "variables": Object {
+      "p": Object {
+        "data": Array [
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+          100,
+        ],
+        "isMonotone": true,
+        "label": "Relative pressure",
+        "max": 100,
+        "min": 100,
+        "units": "kPa",
+        "variable": "p0",
+      },
+      "x": Object {
+        "data": Array [
+          0.0144,
+          0.021,
+          0.0378,
+          0.0519,
+          0.0662,
+          0.0805,
+          0.0993,
+          0.1229,
+          0.1515,
+          0.2064,
+          0.2368,
+          0.2991,
+          0.3488,
+          0.3985,
+          0.4483,
+          0.4981,
+          0.5478,
+          0.5981,
+          0.6484,
+          0.6992,
+          0.7502,
+          0.7963,
+          0.8041,
+          0.8491,
+          0.8572,
+          0.881,
+          0.9023,
+          0.91,
+          0.9171,
+          0.9242,
+          0.9302,
+          0.9355,
+          0.9401,
+          0.9453,
+        ],
+        "isMonotone": true,
+        "label": "p/p0",
+        "max": 0.9453,
+        "min": 0.0144,
+        "units": "",
+        "variable": "p/p0",
+      },
+      "y": Object {
+        "data": Array [
+          195.26,
+          178.75,
+          161.62,
+          143.18,
+          132.87,
+          121.45,
+          109.34,
+          96.079,
+          80.623,
+          71.252,
+          60.32,
+          46.276,
+          43.42,
+          39.124,
+          31.207,
+          29.378,
+          24.273,
+          21.067,
+          18.78,
+          17.177,
+          16.068,
+          15.328,
+          14.809,
+          14.406,
+          13.931,
+          13.316,
+          14.989,
+          13.51,
+          12.366,
+          11.769,
+          11.463,
+          11.268,
+          11.134,
+          11.051,
+          10.945,
+          10.84,
+          10.628,
+          10.512,
+          10.255,
+          10.007,
+          9.797,
+          9.318,
+          8.994,
+          8.7014,
+          5.6535,
+          2.3636,
+          1.0061,
+          0.4996,
+        ],
+        "isMonotone": false,
+        "label": "Amount of absorbed gas",
+        "max": 195.26,
+        "min": 0.4996,
+        "units": "cm^3(STP)/g",
+        "variable": "Va",
+      },
+    },
+  },
+]
+`;
+
+exports[`fromBelsorpCSV belsorp3.csv 1`] = `
+Array [
+  Object {
+    "dataType": "Adsorption Isotherm",
+    "meta": Object {
+      "Adsorption data point number": "18",
+      "Adsorption temperature": "77.360 [K]",
+      "Adsorptive": "N2",
+      "Adsorptive molecular weight": "28.013",
+      "Analysis date": "06/08/2021",
+      "Analysis time": "10:02:06",
+      "Comment1": "test measurement",
+      "Comment2": "",
+      "Comment3": "",
+      "Comment4": ", Vacuum degree before measurement:3.446E-5Pa",
+      "Data file": "TS-074_A-Port1.DAT",
+      "Desorption data point number": "9",
+      "Free space": "41.112 [cm^3]",
+      "Manifold volume": "34.034 [cm^3]",
+      "Molecular cross-sectional area": "0.1620 [nm^2]",
+      "S/N": "182",
+      "Sample mass": "0.0548 [g]",
+      "Sample molecular weight": "0.0000",
+      "Saturation vapor pressure": "96.436 [kPa]",
+      "Specific surface area": "0.0000 [m^2 g^-1]",
+    },
+    "title": "",
+    "variables": Object {
+      "p": Object {
+        "data": Array [
+          97.737,
+          97.098,
+          96.731,
+          96.594,
+          96.507,
+          96.512,
+          96.489,
+          96.441,
+          96.492,
+          96.42,
+          96.429,
+          96.378,
+          96.407,
+          96.375,
+          96.353,
+          96.352,
+          96.283,
+          96.27,
+        ],
+        "isMonotone": false,
+        "label": "Relative pressure",
+        "max": 97.737,
+        "min": 96.27,
+        "units": " kPa",
+        "variable": "p0",
+      },
+      "x": Object {
+        "data": Array [
+          0.00029762,
+          0.0021711,
+          0.0058163,
+          0.013711,
+          0.019327,
+          0.025799,
+          0.043602,
+          0.106,
+          0.2734,
+          0.3041,
+          0.4451,
+          0.5195,
+          0.7366,
+          0.8751,
+          0.8813,
+          0.9334,
+          0.9474,
+          0.9521,
+        ],
+        "isMonotone": true,
+        "label": "p/p0",
+        "max": 0.9521,
+        "min": 0.00029762,
+        "units": "",
+        "variable": "p/p0",
+      },
+      "y": Object {
+        "data": Array [
+          5.7645,
+          10.006,
+          12.816,
+          15.044,
+          16.074,
+          16.645,
+          18.213,
+          21.016,
+          26.064,
+          26.952,
+          30.59,
+          32.761,
+          42.234,
+          60.51,
+          62.52,
+          93.558,
+          112.06,
+          122.29,
+        ],
+        "isMonotone": true,
+        "label": "Amount of absorbed gas",
+        "max": 122.29,
+        "min": 5.7645,
+        "units": "cm^3(STP)/g",
+        "variable": "Va",
+      },
+    },
+  },
+  Object {
+    "dataType": "Desorption Isotherm",
+    "meta": Object {
+      "Adsorption data point number": "18",
+      "Adsorption temperature": "77.360 [K]",
+      "Adsorptive": "N2",
+      "Adsorptive molecular weight": "28.013",
+      "Analysis date": "06/08/2021",
+      "Analysis time": "10:02:06",
+      "Comment1": "test measurement",
+      "Comment2": "",
+      "Comment3": "",
+      "Comment4": ", Vacuum degree before measurement:3.446E-5Pa",
+      "Data file": "TS-074_A-Port1.DAT",
+      "Desorption data point number": "9",
+      "Free space": "41.112 [cm^3]",
+      "Manifold volume": "34.034 [cm^3]",
+      "Molecular cross-sectional area": "0.1620 [nm^2]",
+      "S/N": "182",
+      "Sample mass": "0.0548 [g]",
+      "Sample molecular weight": "0.0000",
+      "Saturation vapor pressure": "96.436 [kPa]",
+      "Specific surface area": "0.0000 [m^2 g^-1]",
+    },
+    "title": "",
+    "variables": Object {
+      "p": Object {
+        "data": Array [
+          96.245,
+          96.234,
+          96.228,
+          96.214,
+          96.209,
+          96.196,
+          96.192,
+          96.193,
+          96.187,
+          undefined,
+        ],
+        "isMonotone": false,
+        "label": "Relative pressure",
+        "max": 96.245,
+        "min": 96.187,
+        "units": " kPa",
+        "variable": "p0",
+      },
+      "x": Object {
+        "data": Array [
+          0.9478,
+          0.9185,
+          0.8795,
+          0.8032,
+          0.6577,
+          0.5122,
+          0.3675,
+          0.2637,
+          0.1388,
+          undefined,
+        ],
+        "isMonotone": true,
+        "label": "p/p0",
+        "max": 0.9478,
+        "min": 0.1388,
+        "units": "",
+        "variable": "p/p0",
+      },
+      "y": Object {
+        "data": Array [
+          5.7645,
+          10.006,
+          12.816,
+          15.044,
+          16.074,
+          16.645,
+          18.213,
+          21.016,
+          26.064,
+          26.952,
+          30.59,
+          32.761,
+          42.234,
+          60.51,
+          62.52,
+          93.558,
+          112.06,
+          122.29,
+        ],
+        "isMonotone": true,
+        "label": "Amount of absorbed gas",
+        "max": 122.29,
+        "min": 5.7645,
+        "units": "cm^3(STP)/g",
+        "variable": "Va",
+      },
+    },
+  },
+]
+`;
diff --git a/src/from/__tests__/__snapshots__/parseBelsorpCSV.test.js.snap b/src/from/__tests__/__snapshots__/parseBelsorpCSV.test.js.snap
new file mode 100644
index 0000000..f507c42
--- /dev/null
+++ b/src/from/__tests__/__snapshots__/parseBelsorpCSV.test.js.snap
@@ -0,0 +1,714 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`parseBelsorpCSV 1`] = `
+Object {
+  "adsorption": Object {
+    "No": Object {
+      "data": Array [
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        9,
+        10,
+        11,
+        12,
+        13,
+        14,
+        15,
+        16,
+        17,
+        18,
+        19,
+        20,
+        21,
+        22,
+        23,
+        24,
+        25,
+        26,
+        27,
+        28,
+        29,
+        30,
+        31,
+        32,
+        33,
+        34,
+        35,
+        36,
+        37,
+        38,
+        39,
+        40,
+        41,
+        42,
+        43,
+        44,
+        45,
+        46,
+        47,
+        48,
+      ],
+      "label": "Peak number",
+      "units": "",
+      "variable": "No",
+    },
+    "na": Object {
+      "data": Array [
+        0.000022289,
+        0.000044887,
+        0.00010545,
+        0.00025223,
+        0.00038821,
+        0.00040127,
+        0.00041572,
+        0.00043709,
+        0.00044646,
+        0.00045753,
+        0.00046899,
+        0.00047417,
+        0.00048363,
+        0.00048831,
+        0.00049304,
+        0.00049674,
+        0.00050272,
+        0.00051142,
+        0.00052507,
+        0.00055171,
+        0.00060275,
+        0.00066873,
+        0.00059409,
+        0.00062153,
+        0.00064272,
+        0.0006607,
+        0.00068386,
+        0.00071687,
+        0.00076635,
+        0.00083787,
+        0.0009399,
+        0.0010829,
+        0.0013107,
+        0.0013923,
+        0.0017455,
+        0.0019372,
+        0.0020646,
+        0.0026912,
+        0.0031789,
+        0.003597,
+        0.0042866,
+        0.0048782,
+        0.0054185,
+        0.005928,
+        0.006388,
+        0.0072107,
+        0.0079749,
+        0.0087115,
+      ],
+      "label": "Amount of absorbed gas",
+      "units": "mol/g",
+      "variable": "na",
+    },
+    "p/p0": Object {
+      "data": Array [
+        0.00002519,
+        0.000053514,
+        0.00012073,
+        0.00029799,
+        0.0012932,
+        0.0017461,
+        0.0026076,
+        0.0054841,
+        0.0078345,
+        0.010417,
+        0.015887,
+        0.021483,
+        0.04261,
+        0.058021,
+        0.073734,
+        0.089467,
+        0.1105,
+        0.1382,
+        0.1682,
+        0.2097,
+        0.2616,
+        0.3141,
+        0.355,
+        0.4004,
+        0.4518,
+        0.502,
+        0.552,
+        0.6016,
+        0.6512,
+        0.7004,
+        0.7488,
+        0.7965,
+        0.8417,
+        0.8512,
+        0.8841,
+        0.8946,
+        0.8989,
+        0.9184,
+        0.927,
+        0.9322,
+        0.9382,
+        0.9413,
+        0.9436,
+        0.945,
+        0.9464,
+        0.9485,
+        0.9495,
+        0.9502,
+      ],
+      "label": "p/p0",
+      "units": "",
+      "variable": "p/p0",
+    },
+    "p0": Object {
+      "data": Array [
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+      ],
+      "label": "Relative pressure",
+      "units": "kPa",
+      "variable": "p0",
+    },
+    "pe": Object {
+      "data": Array [
+        0.002519,
+        0.0053514,
+        0.012073,
+        0.029799,
+        0.1293,
+        0.1746,
+        0.2608,
+        0.5484,
+        0.7834,
+        1.0417,
+        1.5887,
+        2.1483,
+        4.261,
+        5.8021,
+        7.3734,
+        8.9467,
+        11.048,
+        13.816,
+        16.818,
+        20.972,
+        26.156,
+        31.412,
+        35.5,
+        40.04,
+        45.182,
+        50.202,
+        55.204,
+        60.158,
+        65.121,
+        70.04,
+        74.882,
+        79.653,
+        84.165,
+        85.118,
+        88.414,
+        89.455,
+        89.89,
+        91.837,
+        92.696,
+        93.221,
+        93.815,
+        94.131,
+        94.36,
+        94.503,
+        94.641,
+        94.853,
+        94.954,
+        95.017,
+      ],
+      "label": "Absolute pressure",
+      "units": "kPa",
+      "variable": "pe",
+    },
+    "pe2": Object {
+      "data": Array [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+      ],
+      "label": "pe2",
+      "units": "kPa",
+      "variable": "pe2",
+    },
+    "pi": Object {
+      "data": Array [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+      ],
+      "label": "Initial pressure",
+      "units": "kPa",
+      "variable": "pi",
+    },
+  },
+  "desorption": Object {
+    "No": Object {
+      "data": Array [
+        1,
+        2,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        9,
+        10,
+        11,
+        12,
+        13,
+        14,
+        15,
+        16,
+        17,
+        18,
+        19,
+        20,
+        21,
+        22,
+        23,
+        24,
+        25,
+        26,
+        27,
+        28,
+        29,
+        30,
+        31,
+        32,
+        33,
+        34,
+        0,
+      ],
+      "label": "Peak number",
+      "units": "",
+      "variable": "No",
+    },
+    "na": Object {
+      "data": Array [
+        0.0082783,
+        0.0072084,
+        0.0062144,
+        0.0052137,
+        0.0043358,
+        0.0036074,
+        0.0029867,
+        0.002568,
+        0.0018215,
+        0.0014289,
+        0.00134,
+        0.0010485,
+        0.0010128,
+        0.00086486,
+        0.0007548,
+        0.00068038,
+        0.00063005,
+        0.00060302,
+        0.00058049,
+        0.00056955,
+        0.00054921,
+        0.00051936,
+        0.00048032,
+        0.00043257,
+        0.0004195,
+        0.00041188,
+        0.00041282,
+        0.00041751,
+        0.00042107,
+        0.000423,
+        0.00042577,
+        0.00042812,
+        0.00042641,
+        0.00042234,
+        undefined,
+      ],
+      "label": "Amount of absorbed gas",
+      "units": "mol/g",
+      "variable": "na",
+    },
+    "p/p0": Object {
+      "data": Array [
+        0.9453,
+        0.9401,
+        0.9355,
+        0.9302,
+        0.9242,
+        0.9171,
+        0.91,
+        0.9023,
+        0.881,
+        0.8572,
+        0.8491,
+        0.8041,
+        0.7963,
+        0.7502,
+        0.6992,
+        0.6484,
+        0.5981,
+        0.5478,
+        0.4981,
+        0.4483,
+        0.3985,
+        0.3488,
+        0.2991,
+        0.2368,
+        0.2064,
+        0.1515,
+        0.1229,
+        0.099338,
+        0.080461,
+        0.066185,
+        0.051949,
+        0.037806,
+        0.02102,
+        0.014369,
+        undefined,
+      ],
+      "label": "p/p0",
+      "units": "",
+      "variable": "p/p0",
+    },
+    "p0": Object {
+      "data": Array [
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        100,
+        undefined,
+      ],
+      "label": "Relative pressure",
+      "units": "kPa",
+      "variable": "p0",
+    },
+    "pe": Object {
+      "data": Array [
+        94.527,
+        94.01,
+        93.549,
+        93.019,
+        92.425,
+        91.709,
+        91.004,
+        90.233,
+        88.101,
+        85.715,
+        84.913,
+        80.405,
+        79.629,
+        75.024,
+        69.916,
+        64.839,
+        59.81,
+        54.78,
+        49.808,
+        44.826,
+        39.845,
+        34.884,
+        29.909,
+        23.679,
+        20.636,
+        15.151,
+        12.288,
+        9.9338,
+        8.0461,
+        6.6185,
+        5.1949,
+        3.7806,
+        2.102,
+        1.4369,
+        undefined,
+      ],
+      "label": "Absolute pressure",
+      "units": "kPa",
+      "variable": "pe",
+    },
+    "pe2": Object {
+      "data": Array [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        undefined,
+      ],
+      "label": "pe2",
+      "units": "kPa",
+      "variable": "pe2",
+    },
+    "pi": Object {
+      "data": Array [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        undefined,
+      ],
+      "label": "Initial pressure",
+      "units": "kPa",
+      "variable": "pi",
+    },
+  },
+  "meta": Object {
+    "Adsorption temperature": "77.000 [K]",
+    "Adsorptive": "N2",
+    "Adsorptive cross section area": "0.1620 [nm^2]",
+    "Apparatus temperature": "0.0000 [C]",
+    "COMMENT1": "Standard 1",
+    "COMMENT2": "dsun",
+    "COMMENT3": "",
+    "COMMENT4": ", Vacuum degree before measurement:1.111E-4Pa",
+    "Date of measurement": "18/02/06",
+    "Dead volume": "30.402 [cm^3]",
+    "Equilibrium time": "0 [SEC]",
+    "File Name": "Act Carbon 2018 A.DAT",
+    "File name of wall adsorption": "",
+    "Number of adsorption data point :": "48",
+    "Number of desorption data point :": "34",
+    "Sample weight": "8.1300E-02 [g]",
+    "Saturated vapor pressure": "100.000 [kPa]",
+    "Serial number": "00463",
+    "Standard volume": "24.502 [cm^3]",
+    "Time of measurement": "30:25:37",
+    "Version": "",
+    "Wall adsorption correction value1": "",
+    "Wall adsorption correction value2": "",
+  },
+}
+`;
diff --git a/src/from/__tests__/data/belsorp.csv b/src/from/__tests__/data/belsorp.csv
new file mode 100644
index 0000000..17138bf
--- /dev/null
+++ b/src/from/__tests__/data/belsorp.csv
@@ -0,0 +1,109 @@
+File Name,Act Carbon 2018 A.DAT
+Date of measurement,18/02/06
+Time of measurement,30:25:37
+COMMENT1,Standard 1
+COMMENT2,dsun
+COMMENT3,
+COMMENT4,, Vacuum degree before measurement:1.111E-4Pa
+Serial number,00463
+Version,
+Sample weight,8.1300E-02,[g]
+Standard volume,24.502,[cm^3]
+Dead volume,30.402,[cm^3]
+Equilibrium time,0,[SEC]
+Adsorptive,N2
+Apparatus temperature,0.0000,[C]
+Adsorption temperature,77.000,[K]
+Saturated vapor pressure,100.000,[kPa]
+Adsorptive cross section area,0.1620,[nm^2]
+File name of wall adsorption,
+Wall adsorption correction value1,
+Wall adsorption correction value2,
+Number of adsorption data point :,48
+Number of desorption data point :,34
+
+No,pi/kPa,pe/kPa,pe2/kPa,p0/kPa,p/p0,na/mol g^-1
+ADS
+1,0.0000,2.5190E-03,0.0000,100.000,2.5190E-05,2.2289E-05
+2,0.0000,5.3514E-03,0.0000,100.000,5.3514E-05,4.4887E-05
+3,0.0000,1.2073E-02,0.0000,100.000,1.2073E-04,1.0545E-04
+4,0.0000,2.9799E-02,0.0000,100.000,2.9799E-04,2.5223E-04
+5,0.0000,0.1293,0.0000,100.000,1.2932E-03,3.8821E-04
+6,0.0000,0.1746,0.0000,100.000,1.7461E-03,4.0127E-04
+7,0.0000,0.2608,0.0000,100.000,2.6076E-03,4.1572E-04
+8,0.0000,0.5484,0.0000,100.000,5.4841E-03,4.3709E-04
+9,0.0000,0.7834,0.0000,100.000,7.8345E-03,4.4646E-04
+10,0.0000,1.0417,0.0000,100.000,1.0417E-02,4.5753E-04
+11,0.0000,1.5887,0.0000,100.000,1.5887E-02,4.6899E-04
+12,0.0000,2.1483,0.0000,100.000,2.1483E-02,4.7417E-04
+13,0.0000,4.2610,0.0000,100.000,4.2610E-02,4.8363E-04
+14,0.0000,5.8021,0.0000,100.000,5.8021E-02,4.8831E-04
+15,0.0000,7.3734,0.0000,100.000,7.3734E-02,4.9304E-04
+16,0.0000,8.9467,0.0000,100.000,8.9467E-02,4.9674E-04
+17,0.0000,11.048,0.0000,100.000,0.1105,5.0272E-04
+18,0.0000,13.816,0.0000,100.000,0.1382,5.1142E-04
+19,0.0000,16.818,0.0000,100.000,0.1682,5.2507E-04
+20,0.0000,20.972,0.0000,100.000,0.2097,5.5171E-04
+21,0.0000,26.156,0.0000,100.000,0.2616,6.0275E-04
+22,0.0000,31.412,0.0000,100.000,0.3141,6.6873E-04
+23,0.0000,35.500,0.0000,100.000,0.3550,5.9409E-04
+24,0.0000,40.040,0.0000,100.000,0.4004,6.2153E-04
+25,0.0000,45.182,0.0000,100.000,0.4518,6.4272E-04
+26,0.0000,50.202,0.0000,100.000,0.5020,6.6070E-04
+27,0.0000,55.204,0.0000,100.000,0.5520,6.8386E-04
+28,0.0000,60.158,0.0000,100.000,0.6016,7.1687E-04
+29,0.0000,65.121,0.0000,100.000,0.6512,7.6635E-04
+30,0.0000,70.040,0.0000,100.000,0.7004,8.3787E-04
+31,0.0000,74.882,0.0000,100.000,0.7488,9.3990E-04
+32,0.0000,79.653,0.0000,100.000,0.7965,1.0829E-03
+33,0.0000,84.165,0.0000,100.000,0.8417,1.3107E-03
+34,0.0000,85.118,0.0000,100.000,0.8512,1.3923E-03
+35,0.0000,88.414,0.0000,100.000,0.8841,1.7455E-03
+36,0.0000,89.455,0.0000,100.000,0.8946,1.9372E-03
+37,0.0000,89.890,0.0000,100.000,0.8989,2.0646E-03
+38,0.0000,91.837,0.0000,100.000,0.9184,2.6912E-03
+39,0.0000,92.696,0.0000,100.000,0.9270,3.1789E-03
+40,0.0000,93.221,0.0000,100.000,0.9322,3.5970E-03
+41,0.0000,93.815,0.0000,100.000,0.9382,4.2866E-03
+42,0.0000,94.131,0.0000,100.000,0.9413,4.8782E-03
+43,0.0000,94.360,0.0000,100.000,0.9436,5.4185E-03
+44,0.0000,94.503,0.0000,100.000,0.9450,5.9280E-03
+45,0.0000,94.641,0.0000,100.000,0.9464,6.3880E-03
+46,0.0000,94.853,0.0000,100.000,0.9485,7.2107E-03
+47,0.0000,94.954,0.0000,100.000,0.9495,7.9749E-03
+48,0.0000,95.017,0.0000,100.000,0.9502,8.7115E-03
+DES
+1,0.0000,94.527,0.0000,100.000,0.9453,8.2783E-03
+2,0.0000,94.010,0.0000,100.000,0.9401,7.2084E-03
+3,0.0000,93.549,0.0000,100.000,0.9355,6.2144E-03
+4,0.0000,93.019,0.0000,100.000,0.9302,5.2137E-03
+5,0.0000,92.425,0.0000,100.000,0.9242,4.3358E-03
+6,0.0000,91.709,0.0000,100.000,0.9171,3.6074E-03
+7,0.0000,91.004,0.0000,100.000,0.9100,2.9867E-03
+8,0.0000,90.233,0.0000,100.000,0.9023,2.5680E-03
+9,0.0000,88.101,0.0000,100.000,0.8810,1.8215E-03
+10,0.0000,85.715,0.0000,100.000,0.8572,1.4289E-03
+11,0.0000,84.913,0.0000,100.000,0.8491,1.3400E-03
+12,0.0000,80.405,0.0000,100.000,0.8041,1.0485E-03
+13,0.0000,79.629,0.0000,100.000,0.7963,1.0128E-03
+14,0.0000,75.024,0.0000,100.000,0.7502,8.6486E-04
+15,0.0000,69.916,0.0000,100.000,0.6992,7.5480E-04
+16,0.0000,64.839,0.0000,100.000,0.6484,6.8038E-04
+17,0.0000,59.810,0.0000,100.000,0.5981,6.3005E-04
+18,0.0000,54.780,0.0000,100.000,0.5478,6.0302E-04
+19,0.0000,49.808,0.0000,100.000,0.4981,5.8049E-04
+20,0.0000,44.826,0.0000,100.000,0.4483,5.6955E-04
+21,0.0000,39.845,0.0000,100.000,0.3985,5.4921E-04
+22,0.0000,34.884,0.0000,100.000,0.3488,5.1936E-04
+23,0.0000,29.909,0.0000,100.000,0.2991,4.8032E-04
+24,0.0000,23.679,0.0000,100.000,0.2368,4.3257E-04
+25,0.0000,20.636,0.0000,100.000,0.2064,4.1950E-04
+26,0.0000,15.151,0.0000,100.000,0.1515,4.1188E-04
+27,0.0000,12.288,0.0000,100.000,0.1229,4.1282E-04
+28,0.0000,9.9338,0.0000,100.000,9.9338E-02,4.1751E-04
+29,0.0000,8.0461,0.0000,100.000,8.0461E-02,4.2107E-04
+30,0.0000,6.6185,0.0000,100.000,6.6185E-02,4.2300E-04
+31,0.0000,5.1949,0.0000,100.000,5.1949E-02,4.2577E-04
+32,0.0000,3.7806,0.0000,100.000,3.7806E-02,4.2812E-04
+33,0.0000,2.1020,0.0000,100.000,2.1020E-02,4.2641E-04
+34,0.0000,1.4369,0.0000,100.000,1.4369E-02,4.2234E-04
diff --git a/src/from/__tests__/data/belsorp2.csv b/src/from/__tests__/data/belsorp2.csv
new file mode 100644
index 0000000..164d971
--- /dev/null
+++ b/src/from/__tests__/data/belsorp2.csv
@@ -0,0 +1,109 @@
+File Name,Act Carbon 2018 A.DAT,,,,,
+Date of measurement,18.02.06,,,,,
+Time of measurement,30:25:37,,,,,
+COMMENT1,Standard 1,,,,,
+COMMENT2,dsun,,,,,
+COMMENT3,,,,,,
+COMMENT4,, Vacuum degree before measurement:1.111E-4Pa,,,,
+Serial number,463,,,,,
+Version,,,,,,
+Sample weight,8.13E-02,[g],,,,
+Standard volume,24.502,[cm^3],,,,
+Dead volume,30.402,[cm^3],,,,
+Equilibrium time,0,[SEC],,,,
+Adsorptive,N2,,,,,
+Apparatus temperature,0,[C],,,,
+Adsorption temperature,77,[K],,,,
+Saturated vapor pressure,100,[kPa],,,,
+Adsorptive cross section area,0.162,[nm^2],,,,
+File name of wall adsorption,,,,,,
+Wall adsorption correction value1,,,,,,
+Wall adsorption correction value2,,,,,,
+Number of adsorption data point :,48,,,,,
+Number of desorption data point :,34,,,,,
+,,,,,,
+No,pi/kPa,pe/kPa,pe2/kPa,p0/kPa,p/p0,Va/cm^3(STP) g^-1
+ADS,,,,,,
+1,0,2.52E-03,0,100,2.52E-05,0.4996
+2,0,5.35E-03,0,100,5.35E-05,1.0061
+3,0,1.21E-02,0,100,1.21E-04,2.3636
+4,0,2.98E-02,0,100,2.98E-04,5.6535
+5,0,0.1293,0,100,1.29E-03,8.7014
+6,0,0.1746,0,100,1.75E-03,8.994
+7,0,0.2608,0,100,2.61E-03,9.318
+8,0,0.5484,0,100,5.48E-03,9.797
+9,0,0.7834,0,100,7.83E-03,10.007
+10,0,1.0417,0,100,1.04E-02,10.255
+11,0,1.5887,0,100,1.59E-02,10.512
+12,0,2.1483,0,100,2.15E-02,10.628
+13,0,4.261,0,100,4.26E-02,10.84
+14,0,5.8021,0,100,5.80E-02,10.945
+15,0,7.3734,0,100,7.37E-02,11.051
+16,0,8.9467,0,100,8.95E-02,11.134
+17,0,11.048,0,100,0.1105,11.268
+18,0,13.816,0,100,0.1382,11.463
+19,0,16.818,0,100,0.1682,11.769
+20,0,20.972,0,100,0.2097,12.366
+21,0,26.156,0,100,0.2616,13.51
+22,0,31.412,0,100,0.3141,14.989
+23,0,35.5,0,100,0.355,13.316
+24,0,40.04,0,100,0.4004,13.931
+25,0,45.182,0,100,0.4518,14.406
+26,0,50.202,0,100,0.502,14.809
+27,0,55.204,0,100,0.552,15.328
+28,0,60.158,0,100,0.6016,16.068
+29,0,65.121,0,100,0.6512,17.177
+30,0,70.04,0,100,0.7004,18.78
+31,0,74.882,0,100,0.7488,21.067
+32,0,79.653,0,100,0.7965,24.273
+33,0,84.165,0,100,0.8417,29.378
+34,0,85.118,0,100,0.8512,31.207
+35,0,88.414,0,100,0.8841,39.124
+36,0,89.455,0,100,0.8946,43.42
+37,0,89.89,0,100,0.8989,46.276
+38,0,91.837,0,100,0.9184,60.32
+39,0,92.696,0,100,0.927,71.252
+40,0,93.221,0,100,0.9322,80.623
+41,0,93.815,0,100,0.9382,96.079
+42,0,94.131,0,100,0.9413,109.34
+43,0,94.36,0,100,0.9436,121.45
+44,0,94.503,0,100,0.945,132.87
+45,0,94.641,0,100,0.9464,143.18
+46,0,94.853,0,100,0.9485,161.62
+47,0,94.954,0,100,0.9495,178.75
+48,0,95.017,0,100,0.9502,195.26
+DES,,,,,,
+1,0,94.527,0,100,0.9453,185.55
+2,0,94.01,0,100,0.9401,161.57
+3,0,93.549,0,100,0.9355,139.29
+4,0,93.019,0,100,0.9302,116.86
+5,0,92.425,0,100,0.9242,97.182
+6,0,91.709,0,100,0.9171,80.856
+7,0,91.004,0,100,0.91,66.945
+8,0,90.233,0,100,0.9023,57.559
+9,0,88.101,0,100,0.881,40.827
+10,0,85.715,0,100,0.8572,32.027
+11,0,84.913,0,100,0.8491,30.035
+12,0,80.405,0,100,0.8041,23.501
+13,0,79.629,0,100,0.7963,22.702
+14,0,75.024,0,100,0.7502,19.385
+15,0,69.916,0,100,0.6992,16.918
+16,0,64.839,0,100,0.6484,15.25
+17,0,59.81,0,100,0.5981,14.122
+18,0,54.78,0,100,0.5478,13.516
+19,0,49.808,0,100,0.4981,13.011
+20,0,44.826,0,100,0.4483,12.766
+21,0,39.845,0,100,0.3985,12.31
+22,0,34.884,0,100,0.3488,11.641
+23,0,29.909,0,100,0.2991,10.766
+24,0,23.679,0,100,0.2368,9.6956
+25,0,20.636,0,100,0.2064,9.4026
+26,0,15.151,0,100,0.1515,9.2319
+27,0,12.288,0,100,0.1229,9.2529
+28,0,9.9338,0,100,9.93E-02,9.358
+29,0,8.0461,0,100,8.05E-02,9.4378
+30,0,6.6185,0,100,6.62E-02,9.4812
+31,0,5.1949,0,100,5.19E-02,9.5433
+32,0,3.7806,0,100,3.78E-02,9.5958
+33,0,2.102,0,100,2.10E-02,9.5575
+34,0,1.4369,0,100,1.44E-02,9.4663
\ No newline at end of file
diff --git a/src/from/__tests__/data/belsorp3.csv b/src/from/__tests__/data/belsorp3.csv
new file mode 100644
index 0000000..a8b34d3
--- /dev/null
+++ b/src/from/__tests__/data/belsorp3.csv
@@ -0,0 +1,51 @@
+Data file,TS-074_A-Port1.DAT
+Analysis date,06/08/2021
+Analysis time,10:02:06
+Comment1,test measurement
+Comment2,
+Comment3,
+Comment4,, Vacuum degree before measurement:3.446E-5Pa
+S/N,182
+Sample mass,0.0548,[g]
+Manifold volume,34.034,[cm^3]
+Free space,41.112,[cm^3]
+Adsorptive,N2
+Adsorption temperature,77.360,[K]
+Saturation vapor pressure,96.436,[kPa]
+Molecular cross-sectional area,0.1620,[nm^2]
+Adsorption data point number,18
+Desorption data point number,9
+Adsorptive molecular weight,28.013
+Sample molecular weight,0.0000
+Specific surface area,0.0000,[m^2 g^-1]
+
+No,pe/ kPa,p0/ kPa,p/p0,Va/cm^3(STP) g^-1
+ADS
+1,2.9088E-02,97.737,2.9762E-04,5.7645
+2,0.2108,97.098,2.1711E-03,10.006
+3,0.5626,96.731,5.8163E-03,12.816
+4,1.3244,96.594,1.3711E-02,15.044
+5,1.8652,96.507,1.9327E-02,16.074
+6,2.4899,96.512,2.5799E-02,16.645
+7,4.2071,96.489,4.3602E-02,18.213
+8,10.222,96.441,0.1060,21.016
+9,26.377,96.492,0.2734,26.064
+10,29.325,96.420,0.3041,26.952
+11,42.917,96.429,0.4451,30.590
+12,50.070,96.378,0.5195,32.761
+13,71.009,96.407,0.7366,42.234
+14,84.342,96.375,0.8751,60.510
+15,84.914,96.353,0.8813,62.520
+16,89.936,96.352,0.9334,93.558
+17,91.214,96.283,0.9474,112.06
+18,91.656,96.270,0.9521,122.29
+DES
+1,91.224,96.245,0.9478,119.94
+2,88.389,96.234,0.9185,91.856
+3,84.637,96.228,0.8795,69.919
+4,77.281,96.214,0.8032,53.231
+5,63.275,96.209,0.6577,42.253
+6,49.271,96.196,0.5122,37.170
+7,35.346,96.192,0.3675,33.185
+8,25.362,96.193,0.2637,30.852
+9,13.355,96.187,0.1388,27.310
diff --git a/src/from/__tests__/fromBelsorpCSV.test.js b/src/from/__tests__/fromBelsorpCSV.test.js
new file mode 100644
index 0000000..c6c20b6
--- /dev/null
+++ b/src/from/__tests__/fromBelsorpCSV.test.js
@@ -0,0 +1,22 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+
+import { fromBelsorpCSV } from '../fromBelsorpCSV';
+
+describe('fromBelsorpCSV', () => {
+  it('belsorp.csv', () => {
+    const binary = readFileSync(join(__dirname, 'data/belsorp.csv'));
+    const analysis = fromBelsorpCSV(binary);
+    expect(analysis.spectra).toMatchSnapshot();
+  });
+  it('belsorp2.csv', () => {
+    const binary = readFileSync(join(__dirname, 'data/belsorp2.csv'));
+    const analysis = fromBelsorpCSV(binary);
+    expect(analysis.spectra).toMatchSnapshot();
+  });
+  it('belsorp3.csv', () => {
+    const binary = readFileSync(join(__dirname, 'data/belsorp3.csv'));
+    const analysis = fromBelsorpCSV(binary);
+    expect(analysis.spectra).toMatchSnapshot();
+  });
+});
diff --git a/src/from/__tests__/parseBelsorpCSV.test.js b/src/from/__tests__/parseBelsorpCSV.test.js
new file mode 100644
index 0000000..82fdac4
--- /dev/null
+++ b/src/from/__tests__/parseBelsorpCSV.test.js
@@ -0,0 +1,17 @@
+import { readFileSync } from 'fs';
+import { join } from 'path';
+
+import { parseBelsorpCSV } from '../parseBelsorpCSV';
+
+test('parseBelsorpCSV', () => {
+  const binary = readFileSync(join(__dirname, 'data/belsorp.csv'));
+
+  const parsed = parseBelsorpCSV(binary);
+
+  expect(Object.keys(parsed)).toStrictEqual([
+    'meta',
+    'adsorption',
+    'desorption',
+  ]);
+  expect(parsed).toMatchSnapshot();
+});
diff --git a/src/from/fromBelsorpCSV.js b/src/from/fromBelsorpCSV.js
new file mode 100644
index 0000000..96a3ad1
--- /dev/null
+++ b/src/from/fromBelsorpCSV.js
@@ -0,0 +1,36 @@
+import { Analysis } from 'common-spectrum';
+
+import { parseBelsorpCSV } from './parseBelsorpCSV';
+
+export function fromBelsorpCSV(binary) {
+  const result = parseBelsorpCSV(binary);
+  const analysis = new Analysis();
+
+  analysis.pushSpectrum(
+    {
+      x: result.adsorption['p/p0'],
+      y: result.adsorption.na || result.adsorption.Va,
+      p: result.adsorption.p0,
+    },
+    {
+      dataType: 'Adsorption Isotherm',
+      title: result.meta.COMMENT1,
+      meta: result.meta,
+    },
+  );
+
+  analysis.pushSpectrum(
+    {
+      x: result.desorption['p/p0'],
+      y: result.desorption.na || result.adsorption.Va,
+      p: result.desorption.p0,
+    },
+    {
+      dataType: 'Desorption Isotherm',
+      title: result.meta.COMMENT1,
+      meta: result.meta,
+    },
+  );
+
+  return analysis;
+}
diff --git a/src/from/parseBelsorpCSV.js b/src/from/parseBelsorpCSV.js
new file mode 100644
index 0000000..ac513bd
--- /dev/null
+++ b/src/from/parseBelsorpCSV.js
@@ -0,0 +1,94 @@
+import { ensureString } from 'ensure-string';
+
+const variableLabels = {
+  No: 'Peak number',
+  pi: 'Initial pressure', // kPa
+  pe: 'Absolute pressure', // kPa
+  p0: 'Relative pressure', // kPa
+  'p/p0': 'p/p0',
+  na: 'Amount of absorbed gas', // mol g^-1
+  Va: 'Amount of absorbed gas', // ml g^-1
+};
+
+// p0 = saturation pressure
+// p/p0 = relative pressure
+// na = amount of adsorbed gas (N2 or CO2 for example)
+
+/*
+For adsorption we want:
+- x: p/p0
+- y: na or va
+- p:
+
+Adsorptive,N2
+Adsorption temperature,77.000,[K]
+
+For desorption we want
+- x:
+- y:
+- p:
+
+
+*/
+
+export function parseBelsorpCSV(binary) {
+  const text = ensureString(binary);
+  const result = {};
+  result.meta = {};
+
+  const [header, data] = text.split(/\r?\n,*\r?\n/);
+  appendMeta(header, result);
+  appendData(data, result);
+
+  return result;
+}
+
+function appendMeta(header, result) {
+  for (let line of header.split(/\r?\n/)) {
+    let comma = line.indexOf(',');
+    if (comma > 0) {
+      result.meta[line.substring(0, comma)] = line
+        .substring(comma + 1)
+        .replace(',[', ' [')
+        .replace(/,+$/, '');
+    }
+  }
+}
+
+function appendData(data, result) {
+  const lines = data.split(/\r?\n/);
+  const variables = {};
+  const variableNames = [];
+  for (let field of lines[0].split(',')) {
+    const parts = field === 'p/p0' ? [field] : field.split('/');
+    const variable = {
+      label: variableLabels[parts[0]] || parts[0],
+      variable: parts[0],
+      units: parts[1] ? parts[1].replace(' g^-1', '/g') : '',
+      data: [],
+    };
+    variableNames.push(parts[0]);
+    variables[parts[0]] = variable;
+  }
+
+  let target;
+  for (let line of lines) {
+    if (line.startsWith('ADS')) {
+      target = JSON.parse(JSON.stringify(variables));
+      result.adsorption = target;
+    } else if (line.startsWith('DES')) {
+      target = JSON.parse(JSON.stringify(variables));
+      result.desorption = target;
+    }
+    if (target) {
+      if (line.match(/^[0-9E,.-]*$/)) {
+        const fields = line.split(',').map((field) => Number(field));
+        for (let i = 0; i < variableNames.length; i++) {
+          if (variableNames[i]) {
+            target[variableNames[i]].data.push(fields[i]);
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/src/index.js b/src/index.js
index 9eefe8b..c06ddb4 100755
--- a/src/index.js
+++ b/src/index.js
@@ -12,5 +12,6 @@ export { fromIGA } from './from/fromIGA';
 export { fromMicrometricsTXT } from './from/fromMicrometricsTXT';
 export { fromMicrometricsCSV } from './from/fromMicrometricsCSV';
 export { fromBelsorp } from './from/fromBelsorp';
+export { fromBelsorpCSV } from './from/fromBelsorpCSV';
 export { parseRubotherm } from './from/parser/parseRubotherm/parseRubotherm';
 export { parseMicromeriticsExcel } from './from/parser/parseMicrometricsExcel/parseMicrometricsExcel';