Answer / gobinath

But Generally 3 wire RTD only preparred for Industrial
purpose. Most of the Industires & Design document suggest 3
wire RTD is suitable for any application.

Answer / basit

for long distance and more accuracy we use 3 or 4 wire RTD

Answer / shani_dms

depend on distance if distance too short its should be two
wire
3 and 4 wire used for long distance

Answer / rashidmanzoorkt

If the distance between transmitter and RTD is not long,Any
rtd (2,3 or 4 wire)is suitable.

Answer / bhardwaj**

generally pt100 3-wire rtd is used as third wire
compensates the error and maintains the accuracy of
measurement system

Answer / s vedpathak

3 wire RTD (PT100)is good compare to 4 wire & 2 wire as the
lead wire compensation is achieved in it with less cost.

Answer / ashish namdev, bina refinery [

3 & 4 wire rtd use for temp. compensation from sensor to Tx.
3 wire is good & mostly use.
4 wire is best because in 4 wire, both wire(+ & -) have
compensating cable. then reduce unwanted temp. approximate
negligible. then get correct output.
2 wire have more temp. interference error.

Answer / naseer jarral

3 wire rtd is good bcz thired wire is used to compensate
wire resistence it is a wheet stone bridge

Answer / m.murali- inst.technologist

Balance two wires are used for compensation, if no. of
compensation cable increases ie compensation resistance become
average.

in my plant 100% feedwater control v/v is air to close but due to instrument air fail,the valve opens but instead of drum level high its get tripped in low low drum level.the urv of level tx is 0 and lrv is -800.pls tell me the reason. for such behaviour.

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WHAT IS DIFFERENCE BETWEEN TWO WIRE RTD AND THREE WIRE RTD?

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