Humidity Sensors

Humidity sensors product family

Humidity sensors for proven accuracy in any environment.

Humidity is a key component to maintaining occupant comfort and health, as well as total air quality. Siemens offers relative humidity sensors for basic HVAC applications as well as specialized devices for laboratory and pharmaceutical environments, or other critical applications.

QFA Series Room Humidity sensors are engineered to enable accurate and efficient control of room comfort. A wide variety of output signals is available for compatibly with nearly any control system. The patented housing design seamlessly blends into any décor and features strategically placed ventilation slots to maximize airflow and optimize accuracy. A wide range of products are offered to meet any humidity measuring application.

QFM Series Duct Sensors are used to measure relative humidity in HVAC ducts The measuring range covers the entire humidity range of 0 to 100%. A variety of output signals and measuring ranges enable compatibility with any HVAC control system.

The QFM 81 is an on/off hygrostat with micro switch, and temperature-compensated humidity sensor for temperature-independent humidity measurements.

  • +/-2% RH accuracy
  • Available as combination humidity and temperature sensors
  • Certified units available for use in critical environments
  • Dual-purpose units can be used outdoors with optional weather shield
  • An extensive line of duct RH sensors for general purpose and critical environment applications
  • Available as combination humidity and temperature sensors
  • Certified units available for use in critical environments
  • Compatible with most HVAC controllers and building automation systems
  • An extensive offering enables wide application coverage
  • Sensing elements are easily replaceable
  • Compatible with most HVAC controllers and building automation systems
  • An extensive offering enables wide application coverage
  • General purpose room RH sensors
  • Laboratories and other critical environments
  • Outdoor RH measurement
  • General purpose duct RH sensors
  • Laboratories and other critical environments
  • ON / OFF control of humidification / dehumidification equipment

Want to install reliable products? 

Siemens offers a 5-year warranty on valves, actuators, damper actuators, sensors*, thermostats and meters.

* Not applicable to PL-link devices or Series 2200/3200 units with display.

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