PRODUCT DESCRIPTION
SIEMENS QFM2120 - Differential Pressure Sensor
The SIEMENS QFM2120 is a differential pressure sensor engineered for precise measurement of air and non-aggressive gases within industrial HVAC and building automation systems. It provides a linear analog output signal for direct integration with Building Management Systems (BMS) and DDC controllers, facilitating accurate ventilation control, filter status monitoring, and fan performance optimization. This device is critical for maintaining specified pressure differentials in cleanrooms, laboratories, and commercial buildings.
Technical Specifications:
- SERIES/FAMILY: QFM21xx
- COMPONENT TYPE: Differential Pressure Sensor
- ELECTRICAL SPECS:
- NOMINAL VOLTAGE: 24 VAC/DC
- POWER CONSUMPTION: 1 VA (AC) / 0.4 W (DC)
- OUTPUT SIGNAL: 0-10 VDC (selectable via DIP switch)
- MEASUREMENT RANGE: 0 to 1000 Pa (selectable ranges: 0-50 Pa, 0-100 Pa, 0-250 Pa, 0-500 Pa, 0-1000 Pa)
- MECHANICAL/PHYSICAL:
- MEASUREMENT MEDIUM: Air and non-aggressive gases
- PRESSURE CONNECTION: 2x hose nipples, 6.2 mm diameter
- ACCURACY: +/- 1.5% of full scale
- INTERFACE/CONTROL:
- OUTPUT TYPE: Analog voltage
- ADJUSTMENTS: DIP switches for range selection and output type
- ENVIRONMENTAL/MOUNTING:
- IP RATING: IP54
- OPERATING TEMPERATURE: 0 to 50 degrees C (32 to 122 degrees F)
- OPERATING HUMIDITY: 5 to 95% r.h. (non-condensing)
- MOUNTING STYLE: Wall or duct mounting
- COMPATIBILITY/APPLICATION: Building Management Systems (BMS), HVAC controllers, ventilation systems, cleanroom applications, filter monitoring, fan control.