Answer / rajendra shaha

in general RtD and thermister is passive transducer and
thermocouple is active transducer

Answer / sanal sasidharan

RTD & Thermocouple are positive temp. Coefficeint and thermistor is negative temp . Coff..

Answer / krunal

rtd defines increase in resistance when temp. increase. rtd is positive temp. co-efficient. thermistor defines decrease in resistance when temp. increase. thermistor is negative temp. co-efficient. themocouple is measure temp. difference(t1-t2.

Answer / r.kannan

with t/c we can measure upto 1700deg. but with RTD 600
degree is accurable. in t/c only the tip is sensing point
wihre in RTD the average value will be taken.

Answer / elsayem

rtd use for low temperature
thermocpuple use for very high tempretue

I have installed a RTD whose length is 2250mm(RTD stem length), but it's upper 200 -250mm is out of the reactor, and this upper 200mm stem is surrounded by atmospheric temp. And the lower portion i.e. 2000mm is in contact with the measuring fluid, then does the final measuring temp. Gonna change as the upper 200mm RTD stem is out of reactor?

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