Pressure Sensors

Precise pressure sensors for all requirements

Pressure sensor visual

Symaro covers the entire range of requirements for pressure measurement. It comprises sensors for measuring very low to high pressures in all kinds of different media such as liquids, gases, water, refrigerants and air.

Measurement cells matched precisely to the pressure range increase the measurement accuracy. This eliminates the need for temperature or pressure calibration.

Highlights at a glance

  • Optimum pressure sensor for every measuring and application area

  • High measurement accuracy and best quality – thanks to optimized measuring cells over the entire measurement range

  • Great, long-term stability – thanks to innovative and patented measuring elements


QBM81.. - Differential pressure switch

Differential pressure switch

The QBM81.. differential pressure switch are used to monitor under- and overpressure in ventilation and air conditioning plants.

Range of use

  • Pressure: 20…1000 Pa

  • Temperature: 0…70 °C

  • Output: Single pole change over

  • Protection class: IP54



QBM65../65.1../65.2.. - Differential pressure sensors

Differential pressure sensor

For acquiring the differential pressure of air or nonaggressive gases in ventilation, air conditioning and heating plant. The differential pressure sensors are used to measure over- or underpressure in air ducts in relation to ambient pressure as well as to monitor filters and to control fans and acquire pressure differentials between different rooms.

Range of use

  • Pressure: -50…2500 Pa

  • Temperature: 0…70 °C

  • Supply: AC 24 V / DC 13.5…33 V

  • Output: DC 0...10 V

  • Protection class: IP54



QBM66.. - Differential pressure sensors

Differential pressure sensor

For acquiring the differential pressure of air or nonaggressive gases in ventilation, air conditioning and heating plant. The differential pressure sensors are used to measure over- or underpressure in air ducts in relation to ambient pressure as well as to monitor filters and to control fans and acquire pressure differentials between different rooms.

Range of use

  • Pressure: 0…3000 Pa

  • Temperature: 0…70 °C

  • Supply: AC 24 V / DC 13.5…33 V

  • Output: DC 0...10 V

  • Protection class: IP54



QBM65../C / QBM75../C - Certified differential pressure sensors

Certified differential pressure sensor

The calibrated differential pressure sensors are used in circumstances where highly accurate measurements are required or where there is a (statutory) requirement for regular calibration.

Range of use

  • Pressure: -50…2500 Pa

  • Temperature: 0...70 °C

  • Supply: AC 24 V / DC 13.5…33 V

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

  • Protection class: IP54



QBE2002-P.. - Relative pressure sensors for liquids and gases

Relative pressure sensor for liquids and gases

The QBE2002.. relative pressure sensors are suitable for the measurement of static and dynamic positive pressure in HVAC plants, particularly in hydraulic and pneumatic systems using liquid or gaseous media (steam applications).

Range of use

  • Pressure: 0…40 bar

  • Temperature: -40…80 °C

  • Supply: AC 24 V / DC 18…33 V

  • Output: DC 0...10 V

  • Protection class: IP65



QBE61.3../64-DP4 - Differential pressure sensors for liquids and gases

Differential pressure sensor for liquids and gases

These differential pressure sensors are particularly suitable for use in HVAC systems for continuous monitoring of the level or flow rate of neutral or mildly corrosive gases or liquids. Highly resistant to positive system pressure.

Range of use

  • Pressure: 0…10 bar

  • Temperature: 15…80 °C

  • Supply: AC 24 V / DC 18…33 V

  • Output: DC 0...10 V

  • Protection class: IP54 / 65



QBE63-DP.. - Sensors for liquids and gases

Sensor for liquids and gases

These differential pressure sensors are particularly suitable for use in HVAC systems for continuous monitoring o the level or flow rate of neutral or mildly corrosive gases or liquids. Highly resistant to positive system pressure.

Range of use

  • Pressure: 0…1 bar

  • Temperature: -10…80 °C

  • Supply: AC 24 V / DC 20...30 V

  • Output: DC 0...10 V

  • Protection class: IP65



QBE2001../2101 - Sensors for Refrigerants

Sensor for Refrigerants

These relative pressure sensors are suitable for the measurement of static and dynamic positive pressures in HVAC plant, particularly in hydraulic and refrigeration systems using liquid or gaseous media, included ammonia.

Range of use

  • Pressure: -1…29 bar

  • Temperature: -40…150 °C

  • Supply: AC 24 V / DC 16 (8) …33 V

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

  • Protection class: IP67