
Johnson Controls offers a Carbon Dioxide (CO2) and temperature wall mount transmitter for measuring the CO2 levels and the relevant temperature. Optional with humidity measurement.
Typical applications are schools, office buildings, hotels, cinemas or similar. This new CO2 transmitter is easy to install and requires no maintenance or field calibration.
The SCD series incorporates a single beam dual wavelength NDIR CO2 sensor, which compensates for ageing effects, is highly insensitive to pollution and offers outstanding long term stability.
The SCD-xM0 series with RS485 Modbus interface is available with up to 4 measuring values (CO2, VOC, Temperature and rel. humidity).
Wall mount sensor for air quality - MODBUS

MeasuringCO2 + VOC
TypeRoom
Accuracy CO2±50 ppm +3% of measured value (typ. @ 21°C, 50% rH)
Accuracy Temperature±50 ppm +3% of measured value (typ. @ 21°C, 50% rH)
Accuracy RH±2% between 10..90% rH (typ. at 21°C)
Protection ClassIP20 according to DIN EN 60529
Power supply15..35 V = / 19..29 V ~ SELV
Network technologyRS485 Modbus
SensorNDIR (non-dispersive, infrared) with self-calibration, Dual Channel
VOC SensorVOC sensor (heated metal oxide semiconductor)
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