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IoT Wireless Temperature, Relative Humidity and CO2 Sensor, powered by Sigfox

The device measures the temperature, relative humidity, dew point and CO2 from built-in sensors.

The measured values are sent in an adjustable time interval (10 min to 24 h) by radio transmission in the Sigfox network to the COMET Cloud, from which the user can view them using a personal computer or mobile device.

The instrument can monitor up to 2 alarm limits of the measured variable. Exceeding these limits is indicated by sending an emergency message. COMET Cloud transmits this alarm message via e-mail to the selected user. The device is suitable for applications that tolerate the delay of information delivered by Sigfox (max. 10 min).


  • wireless transmission of measured values and alarm states
  • battery power (C size - 3.6 V) with low battery indication (battery life up to 3.5 year)
  • input for external power
  • remote setting of the device from COMET Cloud (maximum once a day)
  • IP20
  • Traceable calibration certificate in accordance with EN ISO / IEC 17025

The availability of Sigfox network in a particular location

Check your Sigfox network availability before you buy your device. COMET devices in the Sigfox network can be used anywhere in the RC1 zone. Learn more about Sigfox (RC) Radio Zones.

  • code
  • Warranty
    3 years

Technical data

Measured value

Relative humidity
Counted values (dew point…)


Measuring range -20 to +60 °C
Accuracy ±0.4 °C
Resolution 0.1 °C
Response time t90 of temperature measurement (temperature step 20°C, air flow approximately 1m/s) t90 < 8 min (temperature change 20 °C)


Measuring range 0 to 100 % RH
Accuracy ±1.8 % RH from 0 to 90 % at 23 °C
Resolution 0.1% RH


Measuring range -60 to +60 °C
Accuracy ±1.5 °C at ambient temperature T <25 °C and RH >30 %
Resolution 0.1 °C


Measuring range 0 to 5000 ppm
Accuracy ±(50ppm +2% from reading) at 25°C and 1013hPa
Resolution 1 ppm


Operating temperature -20 to +60 °C
Channels internal sensor for temperature, humidity and CO2
Message transmission interval adjustable 10 minuteses, 20 minutes, 30 minutes,1 hour, 3 hours, 6 hours, 12 hours, 24 hours
Operating frequency 868 MHz
Maximum transmission power 25mW
Sigfox radiation class 0U
Radio configuration zone RC1 (operation is possible in Europe, Iran, Oman and South Africa)
Typical range of transmitter 50 km in the field, 3 km in the city
Power Lithium battery 3.6 V, C size, capacity 8.5 Ah
Protection class IP20
Number of battery slots 1
Dimensions 179 x 134 x 45 mm
Weight (including batteries) 350g
Warranty 3 years

Battery lifetime

Sending interval 10 minutes 20 minutes 30 minutes 1 hour 3 hours 6 hours 12 hours 24 hours
1x lithium battery A4206 - 8500mAh 10 months 1 year 1,5 years 2 years 3 years 3,2 years 3,4 years 3,5 years

COMET Cloud & SigFox Technology

3 years warranty Traceable calibration certificate IoT Sensor - SIGFOX IoT Sensor - SIGFOX COMET Cloud Wireless Temperature sensor Humidity sensor Dew-point Barometric pressure Two-state inputs Alarm E-mail alarm Battery power IP protection

Optional accessories and download

W6810 - video

COMET Cloud - video

COMET Cloud - demo

Global Sigfox coverage - Sigfox Map