COVID-19 UPDATE - We are still operating so orders will be fulfilled as normal. Some lead times may be affected due to supplier closure but we are endeavouring to ensure minimal disruption to service.

MS24A-R08-MPX - Room Temp, Humidity, VOC and CO2 sensor on MP-Bus AC/DC 24V

On request
£419.55 £503.46

MS24A-R08-MPX - Room combination sensor for MP-Bus AC/DC 24V

•    Temp., humidity, VOC and CO2 sensor
•    Digital input 24 V
•    Analog input 0...10 V
•    Cover white, socket grey

More Information



  • Application Room sensors for measuring the required values or actual values situation in the room ventilation comfort zone. Typical application: requirements-oriented and energy-efficient control of ventilation and air-conditioning systems.

  • Mode of operation The room sensors are operated on the MP bus. The measured quantities of temperature, CO2, VOC, humidity and the optionally assignable DI or AI inputs are read and evaluated by the MP master by means of MP commands. The reaction time of the MP bus (1 … 10 s) is to be incorporated into the design of the bus application.

  • Start-up behaviourThe VOC module outputs an initial value of 450 for 15 minutes after Power On. All other sensors are ready for operation immediately after the start.

  • Temperature measurementResistive temperature sensor.

  • Humidity measurement Capacitive humidity sensor.

  • CO2 measurement Dual-channel infrared absorption sensor for selective recording of the CO2 concentration in the room. The air used by people is recorded through the CO2 concentration and is used as a measured variable for the requirements-oriented air replacement. Application: temporary occupation spaces with a variety of uses, e.g. schools, museums, hotel rooms, events locations, offices, etc.

  • VOC measurementMetal semiconductor sensor for recording VOCs – Volatile Organic Compounds. The VOC sensor records the entire concentration of various gases in the room ventilation, caused typically by smoking materials, food and kitchen odours, body odours, emissions from construction materials and such materials as glues, lacquers, etc. Application: cloak rooms, toilets, restaurants and applications with rapidly increasing odour loads.
Manuals & Datasheets
Technical Information

•     Electrical data Nominal voltage AC 24 V, 50/60 Hz DC 24 V
•     Nominal voltage range AC 19.2 ... 28.8 V / DC 21.6 ... 28.8 V
•     Power consumption 0.5 W  Dimensioning1.5 VA
•     ConnectionTerminal block, 8 x 2.5 mm2
•     Functional dataControlvia MP-Bus
•     Temperature measurementMeasuring range 0 ... 50°C, resolution 0.05°C,Time constant t63 <20 minutes,Accuracy ±0.35°C (with VOC module ±0.5°C)
•     Humidity measurementMeasuring range 10 ... 90% r.h., resolution 0.1% r.h.Accuracy ±3%
•     CO2 measurementMeasuring range 0 ... 2000 ppm CO2, resolution 1 ppm,Long-term drift <20 ppm/a, measurement rate 15 s,Accuracy ±100 ppm
•     VOC measurementMeasuring range 450 ... 65535Integrated automatic calibration algorithm for reducing sensor drift.
•     Inputs1 digital input, AC/DC 24 V, contact rating 1 mA1 analogue input, measuring range 0 ... 10 V, resolution 2.5 mV, no electrical isolation
•     OutputsThe room sensors have no hardware outlets. The sensor values are queried and evaluated by the MP master device through the MP bus.
•     Safety Protection class III Safety extra-low voltage
•     Degree of protectionIP30
•     EMCCE in accordance with 2004/108/EC
•     Control pollution degree2
•     Non-operating temperature–20 ... +60°C
•     Ambient humidity0 ... 95% r.h., non-condensating
•     Dimensions / weightDimensions (H x W x D)99 x 84 x 32 mm
•     WeightApprox. 114 g

Manufacturer Belimo