Mercoid PG-3-P1 Pressure Switch

Mercoid PG-3-P1 Pressure Switch from Mercoid Controls is a compact pressure-sensing device that monitors pressure and switches its electrical contacts when the sensed pressure crosses the preset point. The PG-3-P1 model is listed with a 0-30" range and a 2PSIG read specification. This switch provides a discrete output suitable for wiring into relays, controllers, or alarm circuits in industrial systems where a straightforward pressure threshold signal is required. With a simple, mechanical sensing element, it supports monitoring of low-to-moderate pressure levels and can be used in applications where a compact, standalone switch is needed to trigger safety interlocks or control logic based on pressure changes. Because it is a pressure switch, it yields an output change when the pressure crosses the set range, which supports straightforward integration with control circuits. These specifications—0-30" range and 2 PSIG read—help determine whether this unit matches low-to-moderate pressure monitoring needs in an installation.