any body tell me why 4-20 ma use as a current any reason for this amount why not 3-25 ma?

1 Answers  

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star delta (automatic)latest diagram with theory thanks

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what is the special feature of 5\3 electro pneumatic valve?

1 Answers   Samtel,

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what is Automated smoke test suit? and why we use thah in QTP??

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I m doing my B.tech in production engg.... can i apply for the company? In which subjects i will have to focus for the preparation?

1 Answers  

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How three wire proximity can be used in place of two wire proximity?

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What kind of tools and materials are required to test water softening system of heating plant?

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Mention different type of processes?

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I am in search of PLC with Scan time less than 5ms with around IO's. Normally i feel its around 30ms. Can any one suggest?

2 Answers   HLL,

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What is plant organization?

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reversing of each word in the string

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How to Calibrate Mass Flow transmitter in field

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