CO2 Sensor


The Wireless CO2 Sensor periodically measures CO2 (ppm), temperature (°C/°F), relative humidity (% RH), and barometric pressure (Pa/bar) in the surrounding air and wirelessly transmits the result to nearby Cloud Connectors (gateways) via the SecureDataShot™ protocol. Cloud Connectors relay sensor data to the DT Cloud infrastructure. From here, data can be integrated into other services using our developer APIs or viewed directly in DT Studio

The Wireless CO2 Sensor uses Heartbeat Interval (HBI) to transmit a message notifying the system that it is present and operational, which can be set to 5 min, 15 min, 30 min, 45 min, or 60 min. 

EU and US variants

This sensor is available in two variants, one for the EU and one for the US, due to different certifications, compliances, and wireless communication.


Operating conditions 
Temperature range 0 to 50 °C / 32 to 120 °F
Recommended temperature range 0 to 50 °C / 32 to 120 °F
Humidity 0 to 95% relative humidity
Technical specification
Carbon Dioxide (CO2)

Sensor Technology: NDIR

Range: 0 to 5000 ppm

Typical Accuracy: ± (30 ppm, +3% of reading), max ± (45 ppm,

+3% of reading)


Sensor Technology: CMOS

Range: 0 to 50 °C / 32 to 120 °F

Typical Accuracy: ±1°C / 1.8°F

Relative Humidity

Sensor Technology: CMOS

Range: 10 to 95% (noncondensing)

Typical Accuracy: ± 3%


Sensor Technology: CMOS

Range: 500 to 1110 hPa (mbar)

Typical Accuracy: ± 1 hPa (mbar)

Wireless communication
 EU 868 MHz SRD/ISM band, SecureDataShot
 US 915 MHz ISM band, SecureDataShot
Certifications and compliance 
US Certified to FCC and ISED regulations
FCC ID: 2ATFX-102540
IC: 25087-102540
Recommended storage conditions Cool and dry, near normal room temperature
Construction Material Polycarbonate (PC) 
Size and weight 95 x 66 x 25 mm, 116.0 g
Lifetime Up to 10 years in the default configuration and standard environment (batteries are replaceable)
Wireless Range  
Indoor 160 m | 525 ft
250 m | 820 ft w/Cloud Connector (2nd Gen)
Product numbers and datasheets
102521 Wireless CO2 Sensor EU
102522 Wireless CO2 Sensor US
Datasheet  Datasheet Wireless CO2 Sensor EU/US


Detailed installation and planning instructions can be found in the CO2 Installation Manual.