WFD Series

Waterflow Detector

Robust Construction. The WFD series consists of a rugged,

NEMA 4-rated enclosure. Designed for both indoor and outdoor

use, the WFD series operates across a wide temperature range, from

32°F to 120°F.

Reliable Performance. 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 to assure reliable performance.

False Alarm Immunity. The WFD series incorporates a mechanical

retard feature, which minimizes the risk of false alarm due to

pressure surges or air trapped in the sprinkler system. In addition,

the mechanical retard’s unique sealed design is immune to dust and

other contaminants.

Simplified Operation. The WFD series is designed to simplify

installation. Two conduit openings permit easy attachment to the

local alarm system. The retard mechanism and dual SPDT switches

are field-replaceable.

Agency Listings

The System Sensor WFD series is compatible

with schedule 10 through 40 steel pipe, sizes

2˝ through 8˝, and can be mounted in a vertical

or horizontal position.

Features

• Two-inch mounting hole provided in new WFD30-2 models

• UL-listed models are NEMA 4 rated

• Sealed retard mechanism immune to dust and other contaminants

• Visual switch activation

• Field-replaceable retard mechanism and SPDT switches

• Rugged, dual SPDT switches enclosed in a durable terminal block

• Accommodates up to 12 AWG wire

• Designed for both indoor and outdoor use

• 100 percent synchronization activates both alarm panel and

local bell

• Tamper-resistant cover screws

167-93-E

7770-1653:114

3006195

CS169

S739