Description
The Siemens QFA3171D is a wall-mount room sensor engineered for simultaneous relative humidity and temperature measurement in commercial and institutional HVAC applications. Featuring dual 4–20 mA analog outputs, this sensor integrates seamlessly with building automation systems (BAS), DDC controllers, and energy management platforms, providing reliable, continuous environmental data for precise climate control and occupant comfort.
Key Features
- Dual-parameter sensing: measures both relative humidity (RH) and temperature in a single device
- 4–20 mA analog output signals for both RH and temperature — ideal for long cable runs with high noise immunity
- Integrated local display for on-site readings without additional test equipment
- Wall-mount room enclosure designed for clean, professional installation in occupied spaces
- Compatible with Siemens APOGEE, DESIGO, and third-party BAS/DDC systems accepting 4–20 mA inputs
- Siemens Building Technology quality — engineered for accuracy, longevity, and low maintenance
Typical Applications
- Commercial office buildings and multi-tenant facilities
- Hospitals, laboratories, and cleanrooms requiring precise humidity and temperature monitoring
- Schools, universities, and government buildings
- Hotels, data centers, and any space requiring BAS-integrated environmental sensing
Why Choose the Siemens QFA3171D?
The 4–20 mA current loop output is the industry standard for reliable signal transmission over long distances, making the QFA3171D an excellent choice for large facilities where sensor-to-controller wiring runs may be extended. The built-in display eliminates the need for a handheld meter during commissioning or routine checks, saving time for technicians on the job. As a Siemens Building Technology product, the QFA3171D is backed by a globally recognized brand with decades of expertise in HVAC sensing and controls.
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