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Temperature Sensors - Comparing Types

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Temperature Sensors - Comparing Types
Cost Low High Low
Temperature Range Very wide
Short to medium
Interchange ability Good Excellent Poor to fair
Long-term Stability Poor to fair Good Poor
Accuracy Medium High Medium
Repeatability Poor to fair Excellent Fair to good
Sensitivity (output) Low Medium Very high
Response Medium to fast Medium Medium to fast
Linearity Fair Good Poor
Self Heating No Very low to low High
Point (end) Sensitive Excellent Fair Good
Lead Effect High Medium Low
Size/Packaging Small to large Medium to small Small to medium
  • A thermocouple has two dissimilar conductors forming electrical junctions at differing temperatures. The thermocouple produces a temperature-dependent voltage as a result of the thermoelectric effect and can be interpreted as a temperature measurement.
  • A RTD - Resistance Thermometer Detector - are made of a length of fine wire wrapped around a ceramic or glass core. The RTD wire is of pure material - typically platinum, nickel, or copper - with an accurate resistance/temperature relationship. The electrical resistance provides an indication of the temperature.
  • A thermistor is a type of resistor made of ceramic or polymer materials. The resistance is - like the RTD - dependent on temperature.
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Related Topics

Process Control Systems

Instrumentation, design and documentation of process control systems.

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Measurment of temperature - probes, sensors and transmitters.

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Air - Humidity Measurement from Dry and Wet Bulb Temperature

Relative humidity in moist air can estimated by measuring the dry and wet bulb temperature.

Fixed Temperature Points

Temperature points that can be used as a reference for calibration

Pt100 - Platinum Resistance Thermometer

Pt100 electrical resistance temperature sensor - ranging -220 to 750 degrees Celsius.

RTD Resistance Temperature Sensor

Thermal resistive sensor - a basic introduction.


Introduction to temperature - including Celsius, Fahrenheit, Kelvin and Rankine definitions - and an online temperature converter.


Thermocouples - types, principles and temperature ranges.

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