What types of temperature sensors are there?

There are many types of temperature sensors, including: thermocouple, RTD, semiconductor, infrared, laser, bimetal, liquid expansion and fiber optic sensors. Factors such as measurement accuracy, temperature range, response time, durability, environmental conditions, cost, and availability should be considered when selecting.

Types of Temperature Sensors

Temperature sensors are electronic devices used to measure and convert temperature. They come in many types, each with unique advantages and disadvantages.

Contact temperature sensor

• Thermocouple: Generates voltage through the temperature difference between different metals, suitable for high temperature measurement.
• Resistance Temperature Detector (RTD): Based on the principle that resistance changes with temperature, it has high accuracy and is suitable for a wide temperature range.
• Semiconductor temperature sensor: Using the pn junction characteristics of semiconductors, it has good linearity and fast response speed.

Non-contact temperature sensor

• Infrared temperature sensor: Measures the infrared radiation emitted by the target object, suitable for remote Non-contact distance measurement.
• Laser Thermometer: Use laser technology to measure the temperature of the target object surface, suitable for precision measurement.

Other types

• Bimetal temperature sensor: Uses the principle of two different metals with different thermal expansion coefficients, with switch characteristic.
• Liquid expansion temperature sensor: Based on the principle of liquid expansion, it is suitable for low to high temperature ranges.
• Optical fiber temperature sensor: Use optical fiber to transmit optical signals for remote or distributed temperature measurement.

Factors to consider when selecting a temperature sensor

• Measurement accuracy and resolution
• Temperature range
• Response Time
• Durability and Environmental Conditions
• Cost and Availability

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