Measurement of CO₂, air temperature, relative humidity and VOC (optional)
For installation in air ducts, with 80 mm probe
Active: Uᵥ: AC/DC 24 V
Optional with Modbus or BACnet interface
Optional with LCD display (NFC)
| Type | T° | rH | CO2 | VOC | MODBUS | BACnet | LCD |
|---|---|---|---|---|---|---|---|
| QMS.080.A | • | • | • | – | • | – | – |
| QMS.080.A.LCD | • | • | • | – | • | – | • |
| QMS.080.B | • | • | • | – | – | • | – |
| QMS.080.B.LCD | • | • | • | – | – | • | • |
| QMS.080.U | • | • | • | – | – | – | – |
| QMS.080.U.LCD | • | • | • | – | – | – | • |
| QMSV.080.A | • | • | • | • | • | – | – |
| QMSV.080.A.LCD | • | • | • | • | • | – | • |
| QMSV.080.B | • | • | • | • | – | • | – |
| QMSV.080.B.LCD | • | • | • | • | – | • | • |
| QMSV.080.U | • | • | • | • | – | – | – |
| QMSV.080.U.LCD | • | • | • | • | – | – | • |
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
| Type | Document | File type | Size | |
|---|---|---|---|---|
| Datasheet | QMS - MultiSensors - EN | 1.4 MB | View | |
| Leaflet | QMS - MultiSensors - EN | 786.5 KB | View | |
| Datasheet | QMS - MultiSensor - NL | 1.4 MB | View | |
| Leaflet | QMS - MultiSensor - NL | 786.9 KB | View | |
| Datasheet | QMS - MultiSensor - FR | 1.4 MB | View | |
| Leaflet | QMS - MultiSensor - FR | 787.6 KB | View | |
| Catalog | Catalog 2026 | View |
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European patent:
No. 2307938
No. 3812870
No. 4177697
United States patent:
No. 9823666
Chinese patent:
No. ZL200880130728.9
Registered community design RCD:
No. 001167076-0001
No. 004030633-0001
No. 004030633-0002
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