Temperature Sensor (Thermocouple TC and RTD)

What is Resistance Temperature Detector (RTD)?

Generally, electrical resistance of any metallic conductor varies
according to temperature change. The sensor for measurement of
temperature by utilizing this phenomenon is called “Resistance
Thermometer” or “RTD” and can measure temperatures more
precisely than other temperature sensor.

Features.

1) The use of high purity platinum resistance wire ensure
precision measurement.
2) Excellent in stability and reproducibility.

Vibration & Shock Resistance

For the use under high flow-velocity, vibration or mechancial
shock, RTD element and inner lead wires are shock-resistant
stainless steel inner tube support.

Low Temperature Treatment

Low temperature often cause dew condensation in a protection
tube that results in deterioration of insulation resistance. For use
at sub-zero temperature, please specify “Low Temperature
Treatment” that makes the sensing tip of RTD element covered
with silicon or paraffin coating to protect from dewing.

What is Thermocouple?

When two dissimilar metal conductors are connected together
to form a closed circuit and the two junctions are kept in
different temperatures, thermal electromotive forece (EMF) is
generated in the circuit (Seebeck’s effect).
Thus, when one end (cold junction) is kept constant at a certain
temperature, normally at 0°C, and the other end (measuring
junction) is exposed to unknown temperature, the temperature
at latter end can be determined by measurement of EMF so
generated.
This combination of two dissimilar metal conductors are called
“Thermocouple”.