S&T-HONEYWELL WFS-1002-H

The S&T‑HONEYWELL WFS‑1002‑H provides dependable flow monitoring and automation control for a wide range of plumbing, HVAC, cooling, and fire‑safety systems. Installed directly on a water line, its paddle‑type mechanism senses when fluid begins or ceases flow, then toggles an electrical contact (SPDT) — ideal for activating pumps, shutting down equipment, or triggering alarms. Because it is built with rugged brass or phosphor‑bronze internals and designed to tolerate water with high salt or chlorine content, WFS‑1002‑H remains reliable even in challenging environments. Its high tolerance for operating pressure (up to 20 kgf/cm² / ~2 MPa) and ability to withstand surges (up to 32 kgf/cm² / ~3.2 MPa) make it suitable for pressurized systems. With fluid temperature support up to 100 °C, it works well in both chilled‑water and hot‑water circuits. Compared to electronic flow sensors — which often require calibration, power, or are vulnerable to water chemistry — this mechanical switch ensures simple, maintenance‑free operation. For system integrators, HVAC installers or fire‑safety contractors, WFS‑1002‑H offers a time‑tested, robust, and cost‑effective solution to ensure water is flowing — protecting pumps, chillers, boilers or sprinkler systems from damage due to dry‑run or flow interruption.