top of page

UL/FM Water Flow Detector-Flow Switch System Sensor


UL/FM Water Flow Detector-Flow Switch System Sensor


UL / FM Water flow Detector is a Vane Type design used in fire protection piping systems.

UL/FM Water Flow Detector is designed for both indoor and outdoor use, with a temperature

range of 0° C to 60° C.   System Sensor UL/FM Water Flow Detector 

ultimate in reliable performance ,UL / ULC Listed / FM Approved.  

Specifications: WFDN

Pipe Size:

2" to 8"

Pipe Schedule:

10 through 40

Conduit Entrances:

1/2" conduit: one open, one knock-out type

UL Pressure Rating:

450 PSI

Triggering Threshold Bandwidth Flow Rate:

4-10 GPM

Maximum Surge:

18 FPS

Enclosure Rating:


Operating Temperature Range:

32°F to 120°F (0° to 49°C)


3 years

Contact Ratings:

Two sets of SPDT (Form C); 10.0A, 1/2HP @ 125/250VAC; 2.5A @ 6/12/24VDC

Overall Dimensions:

4.6"H x 4.6"W

Shipping Weight:

4.2 lbs.

UL/FM Water Flow Detector
bottom of page