Xtra sensors

Special sensors to complement the range

Xtra sensors visual

The comprehensive Symaro™ range is complemented by a selection of sensors with a variety of different measurement parameters, from solar sensors to air velocity sensors and flow switches. Users can therefore select precisely the products they need from a truly comprehensive, transparent, and modular sensor range for all applications.

Highlights at a glance

  • Supports energy-efficient control – by measuring solar irradiation

  • Point measurement of air velocity or the volumetric flow in air ducts

  • Increased security – thanks to flow monitoring in HVAC plants and hydraulic systems


QLS60 – solar sensor

Solar sensor

The solar sensor is used as a reference sensor in heating, ventilation and air conditioning plants where compensation of solar radiation is required. Solar compensation is necessary where buildings or building sections with large window areas are subjected to strong solar radiation, especially in plants where thermostatic radiator valves cannot be used.

Range of use:

  • Range: 0...1000 W/m2

  • Supply: AC 24 V / DC 18…30 V

  • Output: DC 0…10 V / 4…20 mA

  • Protection class: IP65

Link to more information:


QVM62.1 – air velocity sensor

Air velocity sensor

This sensor is used to control the air velocity to a constant value, or to balance out pressure fluctuations (supply or extract air control), or to monitor the flow in air ducts. It primarily is used for modulating fan control in primary plants to set the basic volume flow.

Range of use:

  • Range: 0...15 m/s

  • Supply: AC 24 V

  • Output: DC 0…10 V

  • Protection class: IP42

Link to more information:


QVE 1900 – flow switch

Flow switch

The QVE1900 is used in HVACs plants to monitor the flow of fluids in hydraulic systems, especially in refrigeration, heat pump and heating plants, e.g. for use with condensers, boilers, heat exchangers.

Range of use:

  • Pipes: DN 1,25…8“

  • Contact rating: 15 A / AC 24...250 V

  • Output: Relay

  • Protection class: IP65

Link to more information:


QVE 1901 – flow switch

Flow switch

The QVE1901 sensor is used to monitor the flow of liquid medium in HVAC plants in hydraulic systems, in particular, refrigeration, heat pump and heating plants, e.g. for evaporators, boilers, heat exchangers, etc.

Range of use:

  • Pipes: DN 0,75…8“

  • Contact rating: 1 A / AC 230 V / 26 VA 1 A / DC 48 V / 20 W

  • Output: Relay

  • Protection class: IP65

Link to more information: