Why 4-20 amps is being used in instruments? Why cant we use any other range instead of 4-20 amps? Why only 4 amps is taken as lower limit and why 20 amps is taken as the higher limit?

0 Answers  

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What is the reverse action and direct action

2 Answers   Samsung,

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how many types of spped sensors n vibration sensors?their basic principle n connection?

0 Answers   IOCL, ITC Infotech,

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What is derating factor in Motor?

1 Answers  

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how to measure oxygen which methods are using?

0 Answers  

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in yokogawa prosef rd safety PLC how to data send frome local SCS to other SCS and other FCS

2 Answers  

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what are the basic instructions used in simatic s7-300 plc?

5 Answers   Dr Reddys, HZL, Siemens,

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What are the Components of Siemens S7 300 Series PLC system ?

1 Answers   Siemens,

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difference b\w a transducer and a sensor

4 Answers  

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Calibration procedure for Electro magnetic Flow meter

0 Answers   Reliance,

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what is diff between the motor and pump

10 Answers   HCL,

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what is output of FOUNDATION FIELD BUS transmitter

0 Answers  

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