Advantages of RTD | disadvantages of RTD
This page covers advantages and disadvantages of RTD. It mentions RTD advantages or benefits and RTD disadvantages or drawbacks.
RTD stands for Resistance Thermometer. It has positive temperature coefficient i.e. its resistance increases with increase in the temperature.
The figure-1 depicts voltage versus temperature curve of RTD. It can be used in the range from -250 to 10000C.
➨Sensitivity order: Thermistor > RTD > Thermocouple
➨Linearity Order: RTD > Thermocouple > Thermistor
Benefits or advantages of RTD
Following are the benefits or advantages of RTD:
➨They are most stable.
➨They are most accurate.
➨Linearity is higher compare to thermocouples.
Drawbacks or disadvantages of RTD
Following are the disadvantages of RTD:
➨They are passive i.e. current source is needed.
➨They are very expensive.
➨Less rugged compare to thermocouples.
➨Small change in resistance with temperature.
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What is difference between or comparison between
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