Diaphragm operated differential pressure gauge with switch
DP series
Frank W Murphy Ltd.
51 mm dial) and the 25DP and A25DP series (2½ inch/64 mm dial) Swichgage® models are diaphragm-actuated, differential pressure indicating gauges with a built-in electrical switch. The Swichgage® indicates the pressure difference between 2 inlet ports, and provides a closing contact when the user-set limit is exceeded.
These gauges are intended to monitor for oil, fuel or water filter restriction: they can reduce the risk of dangerously high pressure which may rupture the filter, resulting in contaminants entering the system; they can also trigger automatic flushing (backwash) in irrigation systems.
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