| 摘要 |
<p>A pressure indicator of the kind comprising a diaphragm box containing two chambers which are completely separated by a resilient diaphragm, each of the chambers communicating via a connecting channel with an associated one of two fluid sources between which a pressure difference is to be established. A met al plate is fastened to the diaphragm and an inductive sensor is disposed at one of the walls of the diaphragm box, so that a pressure change in at least one of the chambers causes a change in distance between the metal plate and the sensor and, consequently, an output signal from the sensor.</p> |
