Pneumatic Instrumentation

The first types of pneumatic instrumentation were large and cumbersome, involving glass and scales. Later analogue electronic devices were developed and now these are slowly being replaced by digital electronic instruments. It can be anything which is used to indicate, measure or record quantities especially when it means changing or modifying the system. There are a variety of devices which can be used on a pneumatic-driven system. Some are high pressure instruments which means that it cleanses the component as it measures so there is no danger of contamination from the machinery affecting the readings. Most are connected to gauging components such as ring or snap gauges or air spindles. This non-contact arrangement with the part being measured means they are protected. Comparators measure internal dimensions such as taper and straightness. Transducers mostly operate on the piezo resistance principle and consist of a pressure point, integrated compensation resistors and a cable. Pressure sensors are in three basic categories: absolute press, gauge sensor and differential press sensor. Pneumatic instrumentation is of interest to anyone who maintains or repairs such machinery. These devices are especially used for factory automated production systems where inefficiency or breakdowns could lead to lower production.

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