QMS

CO₂ sensor
Non-dispersive infrared technology (NDIR)

Temperature / humidity sensor
Digital

Measuring ranges
CO₂: 0 – 5.000 ppm
Temperature: −10 – 50 °C
Relative humidity: 0 – 95 % RH (non-condensing)

Accuracy
CO₂ repeatability: ±35 ppm, ±3% of measured value
Annual zero-point drift: < ±10 ppm
Temperature tolerance: ±1 K
Humidity tolerance: ±2% RH (10 – 90 % RH, 25 °C)

Long-term stability
Humidity: < ±0.25% per year
Temperature: < ±0.03 K per year

Analog signals
Analog outputs: 1 – 10 V ±150 mV. DC < 5 mA
Optional analog inputs: 1 – 10 V ±150 mV
Optional relay module: DC 30 V, 1 A, changeover contact

VOC
Optional, ±15 index points

Warm-up time
Approx. 30 seconds
VOC sensor: approx. 30 minutes

Power supply
19 – 26 V DC
24 V AC ±10%

Current consumption
38 mA (24 V DC)
61 mA (24 V AC)

Materials
Sensor tube: PBT, colour similar to RAL 7016
Housing (lower part): PBT, colour similar to RAL 7016
Display: PC, transparent
Cover: PC, colour similar to RAL 7016
Ring: PBT, colour similar to RAL 5015
Seal: EPDM

Degree of protection
Housing (OPP-SENS): IP65
Sensor tube: IP20

Cable entry
Strain relief: 2 x M16 and 2 x M12 (PA), colour similar to RAL 7001
Connection: removable spring terminals
Wire cross-section: 0.2 – 1.5 mm²

Ambient conditions
Operating temperature: −10 – 50 °C
Humidity: 0 – 95 % RH (non-condensing)
Minimum air velocity: 0.3 m/s

Features
Loss-proof cover with 8 positions
Housing with IP65 protection class
Fast wiring thanks to screw cover and tool-free spring terminals
Self-calibrating with self-diagnostics
Maintenance-free
Mounting possible in vertical or horizontal airflow direction
3 analog voltage outputs, fully configurable
(min./max. value and output variable)

Optional
Display with NFC interface
Modbus or BACnet version
VOC sensor
2 analog inputs (readable via Modbus)
1 relay output (1 x C/NO/NC) for two-point control
with configurable input, setpoint, and hysteresis