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 long-term 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


AQR.. – room sensors for flush mounting

AQR.. – room air quality sensor for flush mounting

These sensors for flush mounting are used in ventilation and air conditioning plants to enhance room comfort and optimize energy consumption by providing demand-controlled ventilation. They measure CO2 and VOC concentrations as well as temperature and are also available with KNX. Those can also be used as a controller for room temperature or ventilation or to control lighting and blinds.

Range of use:

  • Versions: CO2; CO2/VOC; CO2/T; VOC/T

  • CO2: 0...2000 ppm

  • Temperature: -15…50 °C

  • Supply: DC 15…36 V

  • Output: DC 0...5 V / DC 0...10 V / DC 0...20 mA /
    DC 4...20 mA / DC (0)/4...20 mA 

  • Protection class: IP30


Link to more information:


QPM11../21.. – duct sensors

Duct sensor

The devices are used in air ducts of ventilation and air conditioning plant to enhance room comfort and to optimize energy consumption by providing demand-controlled ventilation. The QPM21.. can be used as transmitters 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: VOC; 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...5 V or  0...10 V

  • Protection class: IP54


Link to more information


QPA10../20.. – room sensors for wall mounting

Room air quality sensor

These sensors are used in ventilation and air conditioning plants to enhance room comfort and optimize energy consumption by providing demand-controlled ventilation. The QPA20.. can be used as transmitters for building automation and control systems and / or display units.

Range of use:

  • Versions: VOC; 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...5 V or 0...10 V

  • Protection class: IP30


Link to more information


QPA84 – room sensors for wall mounting

Room air quality sensor

QPA84 is used in ventilation plant to optimize 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 odors.

Range of use:

  • Versions: VOC

  • Supply: AC 230 V

  • Output: Relay

  • Protection class: IP30


Link to more information