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Flow Switches & Sensors

WFDEXP Explosion-Proof Waterflow Detector

WFDEXP Series explosion proof waterflow detectors are designed to handle extreme conditions.

WFDEXP Explosion-Proof Waterflow Detector

WFDEXP Series explosion proof waterflow detectors are designed to handle extreme conditions. These units are ideal for installation in hazardous locations classified as follows:

• Class I, Groups B, C, D, Division 1 & 2

• Class II, Groups E, F, G, Division 1 & 2

• Class III Division 1 & 2The WFDEXP series detectors consist of a rugged, NEMA 4-rated cast aluminum housing. Designed for both indoor and outdoor use, the WFDEXP series detectors operate across a wide temperature range, from 32 to 160 °F. Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a rugged terminal block to assure reliable performance. The WFDEXP series detectors offer unique features that assure greater operational reliability. By housing the spring mechanism separately from the explosion environment, the sensitivity of the adjustment spring and the detector is protected at all times. Adding to reliability is the sealed retard mechanism, which prevents contamination by dust and dirt when the cover is removed. The WFDEXP series is designed for easy installation. With visible switch activation, retard timing can be verified, even during noisy conditions.

Features & Benefits:
  • New WFD30-2EXP models install in 2 inch hole sizes
  • Designed and approved to operate in hazardous locations
  • NEMA 4 enclosure rating
  • Sensitivity-setting spring mechanism located outside of explosion environment
  • Sealed retard mechanism
  • Visual switch activation
  • Synchronized activation circuit
  • Field-replaceable terminal block and retard mechanism
  • Only one conduit entrance required for hook-up
Certifications:
  • UL Listed E200116
  • CSFM 7770-1653:0145
  • FM Approved 3006195, 3009361