CO2, Temperature, Humidity sensor

  • SFr. 199.60
    Unit price per 
Shipping calculated at checkout.

Only 0 left!
Will not ship until

CO2 & Temperature & Humidity sensor (300 – 40 000 ppm, 0 to +50°C, 0 to 95% RH), indoor box with RJ11 (1-Wire UNI) interface. 3m RJ11 cable included, compatible with most of the HW group monitoring devices.

Housed in a small elegant plastic box, this sensor can be mounted on a wall or a ceiling or placed on a desk. It is small and lightweight so it can be secured in place with a piece of double-sided adhesive tape. A detachable cable with RJ11 jacks is used for the connection. Connection cable 3m included in the package.


  • Communication interface: 1-Wire UNI (RJ11)
  • Maximum lenght from the active 1-Wire port: 30 m
  • Temperature measurement: In the range -0 to +50 °C, accuracy: 0.8 °C
  • Humidity measurement: In the range – 0-95 %RH (Relative Humidity)
  • Measurement CO2: In the range 300 to 40000 ppm
  • 5V power from the 1-Wire port
Applications and usage: 

Thanks to its ability to monitor CO2, Temperature, and RH (Relative Humidity), this sensor can be used in many areas. In addition to monitoring air quality in households, commercial buildings and school buildings, it will also help you in various measurement and regulation projects.


Installation and use

1. Open the box and remove the protective foil from the humidity sensing chip.

Before first use

2. Connect the sensor to any HW group monitoring device (RJ11 cable included).
    See devices below

3. Switch on device power & search for the sensors.

4. Temperature and humidity values are available immediately.

5. Internal CO2 sensor needs to be first calibrated in the environment. The calibration takes 7 days; during this time, it is necessary to air the premises regularly and thoroughly, at least 3 times a day.


Air quality levels

Less than 500 ppm Excellent
500-800  ppm Very good
800-1200  ppm Good
1200-1500  ppm Bad
More than 1500  ppm Unhealthy


Compatible with the following devices:

Ares 10 LTE

Ares 12 LTE

HWg-Ares 12

HWg-Ares 10

STE2 r2

Poseidon2 3268

Poseidon2 3468

Poseidon2 3266

Poseidon2 4002



    We Also Recommend