SR04 CO2

Radio room sensor for measuring CO2, temperature and relative humidity (optional) in residential and commercial buildings. The SR04 CO2 can be connected to EasySens® receiving actuators or gateways, which forward the information to a BMS controller.

Measured valuesCO2, temperature, humidity, depending on the device
Radio technologyEnOcean (IEC 14543-3-10)
Frequency868 MHz, optional:, 902 MHz (Americas)
Power supply15..24 V = (±10%) or 24 V ~ (±10%) SELV
Power consumptionmax. 1,5 W (24 V =) | 3,6 VA (24 V ~)
Measuring range temp.0..+51 °C
Measuring range humidity0..100% rH non-condensing
Measuring range CO20..2550 ppm
Accuracy temperature±1% of measuring range (typ. at 21 °C)
Accuracy humidity±3% between 20..80% rH (typ. at 21 °C)
Accuracy CO2±75 ppm, >750 ppm: ±10% (typ. at 21 °C, 1015 hPa)
Measurement intervalWakeUp time = 100 sec. (default)
Calibrationself-calibration, Dual Channel
DisplayLCD 29x12 mm, monochrome, optional, 3 LEDs indicating air quality (CO2, traffic light function ‘TLF’), optional
EnclosurePC, pure white
Protection (IP)IP30 according to EN 60529
Cable entrybreaking points top/bottom, rear entry
Electrical connectionterminal block, max. 1,5 mm²
Ambient condition0..+50 °C, max. 85% rH non-condensing
Weight90 g
Mountingflush-mounted on standard EU box (Ø=60 mm), screw mounted onto flat surface
Notesoptional with display "LCD", optional with traffic light function "TLF"

Contact us:

Thermokon Sensortechnik GmbH
Platanenweg 1
35756 Mittenaar
Tel.: +49 2778 6960-0

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