Search Results for: Pneumatic instruments

Loop Powered Transmitter

What is the Purpose of Loop Powered Instruments?

Transmitter  A transmitter is a device for converting the response of a primary element into a useable signal, which then transmitted either to an indicating instrument or to a controller. Thus, transmitters is said to be secondary element.  Standard Signal  List some of wiring techniques in transmitter wiring. Some wiring techniques are  Loop Powered transmitter …

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Classification of measuring instruments

The instruments used to measure the physical and electrical quantities are known as measuring instruments. The measuring instruments may be classified as follows: Absolute instrument & Secondary instruments: Absolute instrument measures the process variable directly from the process without the use of conversion. Such instruments do not require comparison with any other standard. The tangent galvanometer is …

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Functions and features of pneumatic valves

Introduction Pneumatic valves control the path of the compressed air. The direction of flow is indicated by an arrow. Actuation can take place manually, mechanically, pneumatically or electrically. Automated systems generally use solenoid-actuated valves that form the interface between pneumatic and electrical control. They are switched by means of the output signals from the signal …

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Active and passive instruments

Introduction We can divide instruments into active and passive according to the consumption of power.”Active” means is that some component inside requires power, either a battery or an external voltage source for working. “Passive” just means that no components inside need to be powered. Examples of active components include transistors, LED lights, and op-amps or …

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