The Sensata FCHM (formerly Cynergy3) is a compact, all-in-one pump control module that combines the functions of a pressure switch, dry-running cut-out, non-return valve, pressure reservoir, and electromechanical control board into a single IP65-rated housing. Designed for Hydromatic-type single-phase or three-phase pumps up to 2 HP, the FCHM replaces the conventional arrangement of separate pressure tank, pressure switch, and control panel — reducing installation footprint, component count, and potential leak points.

How does the FCHM eliminate conventional pressure tanks?

A traditional pump installation requires an air-pre-charged pressure tank to prevent the pump from cycling on and off rapidly during low-flow conditions. The FCHM integrates a maintenance-free hydraulic pressure reservoir that requires no air pre-charging. An internal hydraulic damping chamber absorbs water hammer and smooths pressure fluctuations, while the electromechanical control board manages pump start and stop based on the adjustable start-up pressure setting (1–3.5 bar). When flow drops below 1.5 L/min — indicating that all taps or outlets are closed — the controller shuts the pump down to prevent deadheading. The dry-running cut-out provides an additional layer of protection: if inlet water pressure is lost, the module shuts down the pump and illuminates a visual indicator; reset is manual, ensuring the operator investigates the cause before restarting.

What protection does the FCHM offer against pump damage?

The FCHM is suitable for residential and commercial water pressure boosting, irrigation pump control, and industrial water transfer applications where reliable pump protection and compact installation are priorities.