Specifications

Specifications

Every settled number for Wavie in one place. Wavie is in development: anything not listed here has not been decided yet. Accuracy and precision figures will be published once the reagent chemistry and calibration are final.

Size and power

Size	184 mm tall, 88 × 88 mm footprint
Power	24 V DC, through a barrel jack; power supply included with the Beta Kit
Placement	Stands outside the tank in a tray, with the reagent bottles either side

What it measures

Parameter	How	Notes
Alkalinity	Reagent test, by titration
Calcium	Reagent test, by titration
Magnesium	Reagent test, by titration
Nitrate	Reagent test, by colour development
Phosphate	Reagent test, by colour development
pH	Probe	Accepted reading range 0–14
ORP	Probe	Accepted reading range −2,000 to +2,000 mV
Salinity	Conductivity probe	Also shown as specific gravity. Accepted range 0–45 ppt (SG 1.000–1.040)
Temperature	Digital probe	Accepted range 0–50 °C, read to 0.0625 °C
Dissolved oxygen	Probe, sold separately	Accepted reading range 0–25 mg/L, corrected for salinity

The reagent chemistry is in development; see Reagents. Probes are read about once a minute. "Accepted range" means a reading outside it is treated as a fault, not shown as a value.

Fluid path

Valve	Rotary pinch valve, 8 ports: 6 reagents, tank sample, waste. One port open at a time
Valve motor	NEMA 17 stepper, 25 full steps per port
Manifold	Printed in Formlabs Rigid 10K
Pump	Peristaltic, NEMA 11 stepper, runs both ways
Pump resolution	About 2,325 steps per mL (measured on a prototype), about 0.0004 mL per step
Tubing	Norprene
Cell	Up to 3.5 mL, enforced by the firmware
Reagent bottles	6 × 5 oz (150 mL) HDPE, plus a separate waste bottle

Photometer

Wavelengths	540 nm, 615 nm and 880 nm LEDs, one on at a time
LED driver	AW9523B constant-current, 8-bit brightness per LED
Light sensor	TSL2591, visible-plus-infrared and infrared channels
Sensor gain	1× to 9876×
Exposure	100 to 600 ms

Electronics and connections

Processor	ESP32-S3, 16 MB flash, 8 MB RAM
Wireless	Wi-Fi and Bluetooth Low Energy
Probe inputs	pH, ORP and dissolved oxygen on separately isolated 16-bit converters; salinity with AC excitation; temperature on 1-Wire
Probe connectors	4 × BNC (pH, ORP, salinity, dissolved oxygen), 3.5 mm jack (temperature)
Expansion	CAN bus at 250 kbps; the connector also carries 24 V
Service	USB-C, for re-flashing and development
Lighting	Addressable RGB ring at the base, RGB crescent logo

See Electronics, Optics, Fluid path and Probes for how each part works.