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Measurement ranges:
CO2: 400–2000 ppm
Temperature: 0...50 °C
Relative humidity: 0–100 %
Communication: RS-485 Modbus (RTU)
Accuracy:
CO2: ±40 ppm + 3 % of reading, DC model: 75 ppm or 10 % of reading (whichever is greater)
Temperature: <0.5 °C
Relative humidity: ±2…3 % rH at 0…50 °C and 10…90 % rH
Total error band includes accuracy, hysteresis and temperature effect over 5...50 °C and 10–90 % rH
Measuring elements: Temperature sensor: Pt1000 / Integrated (models with rH-measurement), Non Dispersive Infrared (NDIR) CO2 sensor, thermoset polymer capacitive sensing element for humidity
Measuring units: ppm, °C, % rH
Calibration: Automatic self-calibration, ABC LogicTM or continuous comparison (DC)
Supply voltage: 24 VDC/VAC ±10 %
Current consumption: max 90 mA (at 24 V) + 10 mA for each voltage output or 20 mA for each current output
Output signal for selected measurement: 0/2…10 V (linear to CO2, rH or T) (2–10 VDC display models only) or 4…20 mA (linear to CO2, rH or T)
Optional relay output: Potential free SPDT 250 VAC, 6 A / 30 VDC, 6 A with adjustable switching point and hysteresis
Operating temperature: 0...50°C
Protection standard: IP20
Datasheet