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Air quality controllers

Order numbers

Logo Hugo Müller
GS 47.11 knx
CO2- air quality sensor with CO2/rH-monitor
GS 48.11 knx
CO2- air quality sensor & controller with manual set-point temperature adjustment ± 3°C & CO2/rH-monitor

Air quality sensors & controllers GS 47.11 knx / GS 48.11 knx


  • Detection of air quality
    (CO2-concentration, rel. humidity, temperature)
  • CO2-sensor (Measuring range 390...5.000 ppm air pressure compensated)
  • CO2-value is atmospheric pressure compensated
  • Sensors for CO2-, temperature, humidity and atmospheric pressure measurement
  • Temperature sensor (Measuring range 0...+50°C)
  • Humidity sensor (Measuring range 0...100 % rel. humidity)
  • Humidity comparator function
  • 5 binary and analogue inputs (e.g. for connecting an external temperature sensor)
  • Clearly structured ETS
  • Easy installation and mounting
  • Modern design
  • Flush mounting
  • Fits in common switch range (55 x 55 mm)
  • manual adjustment of set-point temperature via touch slider (adjustment range ± 3°, increment 0,5°)
  • CO2 / rH - monitor
  • Frame is not included in delivery

Information about CO2 and Covid-19

  • Every person is emitting CO2 and aerosols e.g. during breathing. Today aerosols are claimed to be one of the transmission ways of SARS-CoV-2. CO2-concentrations can be measured and the correlation between the CO2 and the aerosol concentration can be used for analytical investigations, which use the measured CO2-concentration to calculate a likely aerosol concentration. (TU Berlin)
  • A longer stay in small, bad or not ventilated room can increase the probability of a Covid-19 spread by aerosols even on bigger distances over 2 m. (RKI)
  • The use of our CO2-sensors and the resulting room ventilation helps minimizing the risk of infection e.g. in schools or offices, gyms, restaurants or other premises where several people stay together.

Hugo Müller GmbH & Co KG

Tel.: +49 (0) 7720 80 83 6