SLIDING PISTON PRESSURE INDICATOR

摘要

A fluid pressure indicating device is disclosed. The pressure indicating device includes a housing defining a cylindrical bore therein, and a piston movably disposed within the cylindrical bore. The housing includes a first portion that is permeable to visible light, a first end member, and a second end member opposite the first end member. A first variable volume is defined by the cylindrical bore, the piston, and the first end member of the housing. An inlet port is defined by the first end member of the housing and is in fluid communication with the first variable volume. A piston bypass channel is disposed outside the cylindrical bore and is in fluid communication with the inlet port. An outlet port is defined by the second end member, such that the outlet port is in fluid communication with the piston bypass channel.