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Flow Switches & Sensors

WFDNF Series Water Flow Detector

WFDNF water flow detectors are designed for primary signaling in systems that use CPVC fittings.

Overview

WFDNF water flow detectors are designed for primary signaling in systems that use CPVC fittings. WFDNF water flow detectors consist of a rugged, NEMA 4 rated enclosure that is more damage resistant than previous metal designs. The water flow detector is designed for both indoor and outdoor use, with the widest available temperature range, from 32 to 150 °F. Clearly marked plastic paddles are included to fit different installation configurations. UL-listed models are equipped with tamper-resistant cover screws to prevent unauthorized entry. Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a durable terminal block with a layout designed to make wiring easy. The wire-ready COM terminals are on a different elevation with a large barrier between switches and easy-to-read, raised, textured lettering. An optional cover tamper switch securely snaps into place, no tools required. WFDNF detectors incorporate a mechanical time delay feature that minimizes the risk of false alarms due to pressure surges or air trapped in the fire sprinkler system. The large and easy-to-turn timer dial makes setting the water flow detector easy with high-contrast, pad-printed markings. The dial offers three tabs to help with turning: the largest tab is located on the dial position for approximately 60 seconds and a notch in the dial indicates approximately 30 seconds, making the detector easy to set in dimly lit locations. The detectors are designed for accuracy and repeatability. They also offer improved performance during vibration in riser applications where detectors are exposed to a large in-rush of water. 

Features & Benefits:
  • Directional cover allows installers and inspectors to easily see the direction of flow
  • UL-listed models are NEMA 4/IP 54 rated
  • Cover is lightweight, unpainted, and corrosion resistant
  • Sealed retard mechanism immune to dust and other contaminants
  • Less exposed metal reduces shock hazard, plastic cover acts as insulator and is resistant to arcing
  • Visual switch activation
  • Audible switch activation (73 dBA)
  • Field-replaceable timer/switch assembly
  • Accommodates up to 12 AWG wire
  • Switch synchronization activates both alarm panel and local bell or horn strobe
Certifications:
  • UL S739
  • ULC
  • CSFM 7770-1653:0501
Specifications

Others

  • Static Pressure Rating
    • 450 pounds per square inch
  • Minimum Operating Ambient Temperature
    • 0 degree Celsius
    • 32 degree Fahrenheit
  • Maximum Operating Ambient Temperature
    • 150 degree Fahrenheit
    • 60 degree Celsius
  • Relay Contact Type
    • Form C
  • Product Type
    • Waterflow Detector
  • Switch Configuration
    • SPDT
  • Maximum Surge
    • 18 ft/s
  • Brand
    • System Sensor
  • Minimum Flow Rate
    • 4

Others

  • Static Pressure Rating
    • 450 pounds per square inch
  • Minimum Operating Ambient Temperature
    • 0 degree Celsius
    • 32 degree Fahrenheit
  • Maximum Operating Ambient Temperature
    • 150 degree Fahrenheit
    • 60 degree Celsius
  • Relay Contact Type
    • Form C
  • Product Type
    • Waterflow Detector
  • Switch Configuration
    • SPDT
  • Maximum Surge
    • 18 ft/s
  • Brand
    • System Sensor
  • Minimum Flow Rate
    • 4
  • Static Pressure Rating : 450 pounds per square inch
  • Minimum Operating Ambient Temperature : 0 degree Celsius|32 degree Fahrenheit
  • Maximum Operating Ambient Temperature : 150 degree Fahrenheit|60 degree Celsius
  • Relay Contact Type : Form C
  • Product Type : Waterflow Detector
  • Switch Configuration : SPDT
  • Maximum Surge : 18 ft/s
  • Brand : System Sensor
  • Minimum Flow Rate : 4
Others
Name
Description
File Size
Date
Size
Fire Sprinkler Monitoring Overview
application/vnd.openxmlformats-officedocument.presentationml.presentation 34.84 MB
6/16/2022
34.84 MB
Engineering Specifications
Name
Description
File Size
Date
Size
Engineering specific
application/pdf 61.26 KB
2/11/2022
61.26 KB
WFDNF-Series-EngSpec Engineering Specs
application/pdf 61.26 KB
5/10/2023
61.26 KB
Name
Description
File Size
Date
Size
Engineering specific
61.26 KB
2/11/2022
61.26 KB
WFDNF-Series-EngSpec Engineering Specs
61.26 KB
5/10/2023
61.26 KB
Fire Sprinkler Monitoring Overview
34.84 MB
6/16/2022
34.84 MB
Name
Description
File Size
Date
Size
Fire Sprinkler Monitoring Overview
34.84 MB
6/16/2022
Engineering specific
61.26 KB
2/11/2022
WFDNF-Series-EngSpec Engineering Specs
61.26 KB
5/10/2023