What is the working principle of common temperature sensors?

Release Date:

2023-06-12

Author:

In our daily lives, we all frequently encounter thermometers, water heaters, microwave ovens, refrigerators, and more. All of these devices rely on an important component— Temperature sensor , this article will introduce to you Temperature sensor 、 Principle of Temperature Sensors 、 Types of Temperature Sensors 。

What is a temperature sensor?

Temperature sensor It is a kind of Measuring the degree of hotness or coldness of an object of the device, in a readable format Temperature measurement is provided via electrical signals. . The more common one is Thermocouple and Resistance Temperature Detector 。

Temperature sensor type

In practical applications, numerous temperature sensors are available, each exhibiting distinct characteristics depending on the specific use case. Temperature sensors are broadly categorized into two fundamental physical types:

Contact temperature sensor Type — these types of temperature sensors need to be compatible with Physical contact with the sensed object , and use Conduction for monitoring temperature changes They can be used over a very wide temperature range. Solid detection 、 Liquid or Gas 。
Non-contact temperature sensor Types — These types of temperature sensors Monitor temperature changes using convection and radiation. They can be used to detect liquids and gases that emit radiant energy as they heat up and cool down, causing convection currents that carry the energy to the bottom, or to measure radiant energy transmitted from objects in the form of infrared radiation (such as solar radiation).

Contact and non-contact temperature sensors are further classified into the following types; the operating principles of these sensors will now be explained.

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