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Measurement ranges:
+ CO2: 0–2000 ppm / 400–2000 ppm (selectable via jumper)
+ Temperature: 0...50 °C
+ Relative humidity: 0–100 %rH
Communication: RS-485 Modbus (RTU)
Accuracy:
+ CO₂: ±40 ppm + 3 % of reading (typical), additional ±60 ppm for first weeks
+ Relative humidity: ±2.2 % rH (typical at 20 °C, 30 % rH)
+ Temperature: ±0.4 °C (typical at 20 °C)
Measuring elements:
+ CO2: Non-dispersive infrared (NDIR)
+ Temperature: Integrated to CMOS
+ Relative humidity: Thermoset polymer capacitive sensing element
Measuring units:
+ CO2: ppm
+ Relative humidity: % rH
+ Temperature: °C
Calibration (CO2): Automatic self-calibration, ABC LogicTM
Supply voltage: 24 VDC/VAC ±10 %
Output signal 1–4: 0...10 V (optional 2...10 V / 0...5 V, display or configuration tool required); Optional 4...20 mA
Linear to selected measurement (CO2, VOC, PM, rH or Temp)
Operating temperature: 0...50 °C
Protection standard: IP20
Noted:
CO2 = Carbon dioxide sensor
rH = Humidity sensor
T = Temperature sensor
D = Display
