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A20PE和A25PE系列型
-除带微动开关与20P/25P类似
-工厂设定开关点

A25PE和A25PE系列型
-除带微动开关外与20P/25P类似
-工厂设定开关点
-A25PE是CBS标准标定的非危险场地使用的
-A25PE-EX是CSA标准标定的用于Class I，Div.1
Group C&D的危险场地

A20PE and A25PE Swichgage
A20PE (was A20EO) and A25PE (was A25EO). Features internal snap-acting SPDT switches, instead of the single pole/pointer contacts. When the switch closes on falling pressure, it becomes set, as pressure rises the switch resets (refer to wiring diagram).
Model A25PE is CSA listed for non-hazardous areas.
Model A25PE-EX is CSA listed for Class I, Division 1, Groups C and D hazardous areas.

Murphy A20 Series Pressure Swichgages

A20P-50 (05704515): 2" Pressure Swichgage with Polycarbonate Case
A20P-75 (05704254): 2" Pressure Swichgage with Polycarbonate Case
A20P-100 (05704255): 2" Pressure Swichgage with Polycarbonate Case
A20P-150 (05704256): 2" Pressure Swichgage with Polycarbonate Case
A20P-200 (05704257): 2" Pressure Swichgage with Polycarbonate Case
A20P-300 (05704258): 2" Pressure Swichgage with Polycarbonate Case
A20P-400 (05702525): 2" Pressure Swichgage with Polycarbonate Case
Murphy A25 Series Pressure & Vacuum Swichgages
A25P-100 (05704337): 2.5" Pressure Swichgage? with Polycarbonate Case