Description
The Siemens QFA3212.EWSN is a professional-grade room relative humidity (RH) and temperature sensor designed for building automation and HVAC control applications. It delivers accurate, reliable environmental monitoring with a flexible output configuration, making it an ideal choice for commercial and institutional facilities.
Output Signal & Configuration
- Selectable output signal: 0–10 Vdc or 4–20 mA — field-configurable to match your control system requirements
- Humidity measurement range: 0–100% RH
- Temperature sensing element: 1 kΩ Pt 385a (platinum RTD)
Electrical & Mechanical Features
- Connection type: Terminal block for secure, professional wiring
- No display — clean, unobtrusive wall-mount profile suitable for occupied spaces
- Compact room-mount enclosure for easy installation on standard wall surfaces
Applications
- Building automation systems (BAS) and direct digital control (DDC)
- Commercial HVAC humidity and temperature monitoring
- Demand-controlled ventilation and indoor air quality management
- Offices, schools, hospitals, and other commercial facilities
Why Choose the Siemens QFA3212.EWSN?
Siemens Building Technologies is a globally recognized leader in building automation and HVAC controls. The QFA3212.EWSN combines dual-parameter sensing — relative humidity and temperature — in a single compact unit, reducing installation complexity and cost. The selectable 0–10 Vdc or 4–20 mA output ensures broad compatibility with virtually any BAS or DDC controller on the market. The terminal block connection provides a clean, reliable wiring interface, and the no-display design keeps aesthetics neutral in occupied spaces.
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