Answer / ashish tiwary

The selection of a PNP sensor verses an NPN sensor is determined by the nature of the circuit the device is to be used in. When used in a traditional relay type control circuit, it is normally possible to use either the PNP or the NPN type of sensor as shown below. PNP sensors tend to be more commonly used.

What are use of positioner.

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A RANGE OF TRANSMITTER IS (0-400)B mm abs what is "B"?

1 Answers   HCL,

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can we use a control valve without positioner

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what is written on orifice plate?

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1 Answers   Base Automation, NTPC, PDO,

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What is Integral and Derivative control?

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2 Answers  

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