Connecticut-based fluid-sensor manufacturer, Gems Sensors Inc., (, recently acquired Pressure Devices Inc. (PDI) of West Union, S.C. (, an industrial-pressure-switch manufacturer. Gems Sensors, a Danaher Corp. business, manufactures liquid-level, flow, and pressure sensors and controls. Pressure Devices offers pressure switches for low, high, and differential pressure and vacuum applications serving the medical, automotive, agricultural, mobile, and industrial markets.