System Sensor WFD20N
System Sensor WFD20N
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The System Sensor WFD20N is a 2-inch waterflow detector designed for small to medium-diameter fire suppression systems to monitor water movement in sprinkler pipelines. This vane-type detector automatically signals the fire alarm control panel when water flows through 2-inch diameter steel pipe, triggering an immediate alarm condition with dual synchronized relays for reliable notification and system control.
Key Features
- 2-inch pipe compatibility for standard sprinkler systems with 450 PSI maximum pressure rating
- Two sets of SPDT (Form C) synchronized switches providing redundant alarm signaling
- Rugged NEMA 4-rated enclosure with corrosion-resistant design for reliable service
- Low 4 to 10 GPM alarm threshold reduces false alarms from system surges
Technical Specifications
- Operating Voltage: 15–32 VDC for addressable alarm panel integration
- Operating Temperature Range: 32°F to 150°F (0°C to 66°C)
- Contact Ratings: 10 A @ 125/250 VAC and 2.5 A @ 24 VDC
- Standby Current: Less than 250 µA; Alarm Current: 5–7 mA
- Pipe Compatibility: 2-inch steel water pipe, Schedule 7 through 40; vertical or horizontal mounting
- Dimensions: 2.6 inches H × 3.5 inches W × 6.7 inches D
- Humidity Range: 10%–93% non-condensing
Certifications
- UL Listed for fire protection service
- FM Approved for automatic detection and signaling
- NFPA 72 compliant fire alarm component
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