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Measure photosynthetically active radiation (PAR) with an I2C sensor for Arduino or Raspberry Pi.
C++ Rust Python
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src initial Nov 11, 2019

Photosynthetically Active Radiation Sensor

  • Spectral range: 400~700nm
  • Accuracy: ±5%
  • Range: 0 - 2500 μmol/m²/s
  • Response time: < 1 second
  • Interface: I2C
  • Voltage range: 3.3 - 5 V

What it is

A PAR sensor in a waterproof aluminum enclosure with a 1.5m length of cable. The sensor comes pre-calibrated and doesn't require any subsequent recalibration.

The device uses the Qwiic Connect System for wiring, it's an easy-to-use, polarized, push-to-fit connector. No more mistaken connections or soldering header pins.

It comes with a small tripod and bubble level for easy deployment.

Using it

The documentation on the specification, and setup of the sensor is available.

The Arduino IDE, PlatformIO, and library is in the respective library manager. Any Arduino compatible board will work. Any Raspberry Pi 3, 4 or Zero will work as well.

A python and rust library is available for the Raspberry Pi.

#include <uFire_PAR.h>
uFire_PAR par;

Buy it

Visit and buy a board and probe.

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