Answer / hassan abbas

these level transmitters measure the level in either of the three ways:

The weight of the fluid
The pressure head of the fluid
The position of the fluid in a container

Why we are using 4-20 mA as Analog signal transmission other than 3 to 19 or 2 to 18 or 6 to 22 like wise ? What is the reason behind using 4 & 20 mA? Can anyone give proper technical reply ?

5 Answers   Air Liquide,

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When can a bypass not used on a positioner?

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send me last 5 years questions asked in rrb chennai, for section engineer

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Difference between dcs and plc including date processing and architecture.

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where the use of direct action control valve?

2 Answers  

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WHAT IS AN INTERLOCK SYSTEM ?? HOW THEY WORKs ?? WHERE IT IS USED ??? MAINLY ??

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draw shematic diagram of c/v positioner(smart type)?

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How to Calibrate Penumatic Transmitter.LRV= -60 URV= -20.Can u give me Answer.

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How r the calculation of process line mpm.

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need to calculate flow rate with the help of dp range and orifice bore dia and size. range is 0 to 400 inwc and orifice size is 12 inch 150 # rf and bore dia is 7.180 inch. need to calculation for flow rate

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diffrence b/w accuracy and precision?

4 Answers   HPCL,

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