Description
The Siemens QFM3171 is a professional-grade duct-mount relative humidity sensor engineered for building automation and HVAC control applications. Delivering a precise 4-20mA analog output signal, it provides reliable, continuous measurement across the full 0–100% relative humidity range, making it suitable for demanding commercial and industrial environments.
Key Features
- 4-20mA output signal for both relative humidity and temperature — ideal for long-distance signal transmission with minimal noise interference
- Measurement range: 0–100% relative humidity (RH)
- Adjustable insertion depth probe: 3.5 to 8 inches, accommodating a variety of duct sizes and configurations
- Terminal block connection for fast, secure field wiring
- No display — designed for clean, unobtrusive duct installation where a local readout is not required
- Dual-parameter sensing: monitors both relative humidity and temperature via independent 4-20mA outputs
Application
The QFM3171 is well-suited for use in air handling units, commercial ductwork, and building management systems (BMS) where accurate humidity and temperature data is critical to maintaining indoor air quality, energy efficiency, and process control. The adjustable probe length ensures compatibility with a wide range of duct dimensions, while the terminal block simplifies integration into control panels and DDC systems.
Product Specifications
- Brand: Siemens Building Technology
- SKU / Part Number: QFM3171
- Output Signal: 4-20mA (Humidity); 4-20mA (Temperature)
- Humidity Measurement Range: 0–100% RH
- Probe Insertion Depth: Adjustable, 3.5–8 inches
- Connection Type: Terminal Block
- Display: None
- Mounting: Duct-mount
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