Answer / aissa

why we use sensing type(NPN)on a vibration monitring
system not a (PNP)sensing type
ANSWER
it's a matter of THE COST since NPN technology is less than PNP

what do you mean by Loop checking ? What are the cold loop check and hot loop check? what are the difference between these two loops?

1 Answers  

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please tell me five types of fault of control valve and positioners?please

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CAN YOU USE MOVING COIL METER FOR MEASURING A.C?

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