Tracker M8 Temperature/Humidity(001)

M8 Sensor Temperature/Humidity

The M8 Temperature/Humidity sensor provides an easy way to measure temperature and humidity with the Tracker One. It connects to the M8 connector on the outside of the Tracker One.

  • IP 67 waterproof rating
  • Durable, weatherproof, metal casing
  • ±0.5°C temperature accuracy
  • ±2% relative humidity accuracy
  • Temperature range -22°C to 80°C
  • 120 cm. (47.25 inch) cable
  • The Tracker One preserves its IP67 waterproof rating with the M8 connector in use


The sensor (in the metal case) is a weatherproof Sensiron SHT-31D, I2C temperature and humidity sensor.

The sensor is powered by the CAN_PWR output on the M8 connector. It can be powered down when not sensing temperature to reduce power consumption, if desired.

The cable assembly contains a 3.3V voltage regulator, as the I2C interface on the Tracker One is limited to 3.3V.



Firmware library

The Particle sht3x-i2c library can be used to communicate with this sensor from user firmware.

  • I2C address: 0x44
  • I2C maximum speed: 400 MHz
  • Tracker One interface: Wire3

The M8 Temperature/Humidity Sensor Tutorial includes additional information for using the library and this sensor.

Ordering information

SKU Description
M8TEMPHUMIEA M8 Temperature and humidity sensor, (x1)
M8TEMPHUMITY M8 Temperature and humidity sensor, (x40)

Revision history

Revision Date Author Comments
001 2021 Mar 01 RK First release