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Inst Tools > Blog > Temperature Measurement > Comparison of Temperature Sensors – Industrial Process Control

Comparison of Temperature Sensors – Industrial Process Control

The temperature sensors come in various types, each with its own set of characteristics suitable for specific applications. Compare Now.

Last updated: October 30, 2023 5:46 am
Editorial Staff
Temperature Measurement
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The temperature sensors come in various types, each with its own set of characteristics suitable for specific applications.

Comparison of Temperature Sensors

Comparison of Temperature Sensors - Industrial Process Control

Here we compared the popular temperature sensors in the below table. let’s have a look at it.

ParameterThermocoupleRTD (Resistance Temperature Detector)ThermistorInfraredBimetallic StripSemiconductor (IC)Fiber Optic
Principle of OperationSeebeck effectResistance varies with temperatureResistance varies exponentially with temperatureEmission of infrared radiationMechanical bending due to thermal expansionBandgap of semiconductor varies with temperatureLight wavelength changes with temperature
Temperature RangeWide (-200 to 2300°C)Moderate (-200 to 850°C)Limited (-100 to 300°C)Wide (-50 to 1000°C)Limited (-30 to 120°C)Moderate (-55 to 150°C)Wide (-200 to 800°C)
AccuracyModerateHighModerate to HighModerateLow to ModerateModerate to HighHigh
Response TimeFastModerateFastFastSlowFastFast
SensitivityLowModerateHighModerateLowModerateHigh
CostLowHighLowModerate to HighLowModerateHigh
LinearityNon-linearLinearNon-linearNon-linearNon-linearLinearLinear
Self-heatingLowModerateHighNoneNoneModerateNone
Ease of InstallationEasyModerateEasyModerateEasyModerateModerate
Safety AspectsGenerally SafeGenerally SafeGenerally SafeLimited (eye safety)Generally SafeGenerally SafeGenerally Safe

Here’s a brief explanation of the terms used:

  • Principle of Operation: The basic principle that allows the sensor to measure temperature.
  • Temperature Range: The range of temperatures the sensor can accurately measure.
  • Accuracy: How precisely the sensor can measure temperature.
  • Response Time: How quickly the sensor can respond to changes in temperature.
  • Sensitivity: How much the output changes for a given change in temperature.
  • Cost: The relative financial outlay required to purchase and install the sensor.
  • Linearity: Whether or not the output is directly proportional to the temperature.
  • Self-heating: Whether the sensor itself generates heat during operation, which could affect its accuracy.
  • Ease of Installation: How simple it is to install the sensor.
  • Safety Aspects: Considerations regarding the use of the sensor in hazardous conditions.

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