System Sensors 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.

Robust Construction. The WFD series consists of a rugges, NEMA 4 rated enclosure. Designed for both indoor and outdoor use, the WFD series operates across a wide temperature range, from 32 degrees Fahrenheit to 120 degrees Fahrenheit.

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 minimized the risk of flase alarm due to pressure surges or air trapped in the sprinkler system. In addition, the mechanical retards unique sealed design is immune to dust and other contaminants.

New WFD30-2 models install in 2" hole sizes

UL models are NEMA 4 rated

Sealed retard mechanism assures that the retard is not contaminated by dust and dirt when the cover is removed.

Visual switch activation permits installer to accurately set retard under noisy conditions.

Rugged, dual SPDT switches are enclosed in a durable terminal block.

Accommodates up to 12 AWG wire

100% synchronization activates both alarm panel and local bell simultaneously.