The 20DP and A20DP series (2 inch / 51 mm dial) and the 25DP and A25DP series (2 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. 

規(guī)格參數(shù)特點(diǎn):
Monitors oil, fuel and water filters
Combination indicating gauge and user-set limit switch
Actuates alarm, shutdown or backwash when filter becomes clogged
Signals coolant loss or aeration on engine water pump
Metal case, ground return (20DP/25DP) or polycarbonate case, insulated return (A20DP/A25DP)
Available in dual (PSID/kPa) or single (Bar) scales
經(jīng)典的繼電式儀表設(shè)計(jì)；
帶報(bào)警點(diǎn)輸出的壓力指示；
帶報(bào)警點(diǎn)可視并可從表面調(diào)節(jié)；報(bào)警點(diǎn)輸出可用于觸發(fā)報(bào)警及停機(jī)等功能；
產(chǎn)品技術(shù)指標(biāo)超過(guò)通用的SAE標(biāo)準(zhǔn)。