Air quality sensors

Unique product range with stable measurement method

Air quality sensor visual

Symaro™ air quality sensors cover all requirements and are suitable for every type of building. The high-precision multisensors (CO2/VOC, CO2/T and CO2/T/r.h.) are available for room and duct applications, and also with an attractive display.

Highlights at a glance

  • Wide selection of multisensors for room and duct applications

  • Cost efficiency with guaranteed measurement accuracy and longterm stability – through precise infrared measurement and self calibration

  • High application and installation comfort – through patented technology

  • Energy savings and maximum room comfort – thanks to demand-controlled ventilation


QPA20.. – room air quality sensors

Room air quality sensor

In ventilation and air conditioning plants to enhance room comfort and optimise energy consumption by providing demand-controlled ventilation. The QPA20.. can be used as a transmitter for building automation and control systems and / or display units.

Range of use:

  • Versions: CO2; CO2/VOC; CO2/T; CO2/T/r.h.

  • CO2: 0...2000 ppm

  • Temperature: -35…50 °C

  • Humidity: 0…95%

  • Supply: AC 24 V / DC 13.5…35 V

  • Output: DC 0...10 V

  • Protection class: IP30

Link to more information


QPA84 – room air quality sensors

Room air quality sensor

QPA84 is used in ventilation plant to optimise the indoor air quality and the consumption of energy by providing demand-controlled ventilation depending on demand, primarily in rooms with greatly varying occupancy levels and / or odours.

Range of use:

  • Versions: VOC

  • Supply: AC 230 V

  • Output: Relay

  • Protection class: IP30

Link to more information


QPM21.. – duct sensors

Duct sensor

The devices are used in air ducts of ventilation and air conditioning plant to enhance room comfort and to optimise energy consumption by providing demand-controlled ventilation. The QPM21.. can be used as a transmitter for building automation and control systems and / or display units.The sensors are not suited for use as safety devices, such as gas or smoke warning devices!

Range of use:

  • Versions: CO2; CO2/VOC; CO2/T; CO2/T/r.h.

  • CO2: 0...2000 ppm

  • Temperature: -35…50 °C

  • Humidity: 0…95%

  • Supply: AC 24 V / DC 13.5…35 V

  • Output: DC 0...10 V

  • Protection class: IP54

Link to more information