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Views: 0 Author: Site Editor Publish Time: 2022-07-22 Origin: Site
Temperature sensing can be of two types: contact and non-contact. In contact-based temperature sensing, the sensor will be in physical contact with the object being sensed. In non-contact temperature sensing, the sensor interprets the radiant energy of the heat source. Radiant energy is the form of energy emitted in the infrared portion of the electromagnetic spectrum. Non-reflective solids and liquids can be monitored using non-contact techniques.
What is the role of the temperature sensor?
How can common temperature sensors be classified?
What is the principle of different types of temperature sensors?
The temperature sensorconverts the temperature into a usable output signal by using the law of various physical properties of the substance changing with the temperature. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into two categories: thermal resistance and thermocouple. The shape of modern temperature sensors is very small, which makes it widely used in various fields of production practice, and also provides countless conveniences and functions for our lives.
Commonly used temperature sensors can be divided into resistance signal temperature sensor, current signal temperature sensor, voltage signal temperature sensor, digital signal temperature sensor, etc. according to the signal;
According to the packaging form, it can be divided into integrated and split, and can also be divided into probes, probe rods, probes, etc.;
According to the accuracy, it can be divided into high precision and ordinary precision temperature sensor;
According to the size, it can be divided into miniature temperature sensor, lightweight temperature sensor, etc.
There are two types of temperature sensors, resistance sensing and thermocouple sensing. The principle is as follows: Resistance sensing. As the temperature of the metal changes, its resistance value also changes. For different metals, each time the temperature changes by one degree, the resistance value changes are different, and the resistance value can be directly used as an output signal. Thermocouple Sensing: A thermocouple consists of two wires of different materials welded together at the ends. By measuring the ambient temperature of the unheated part, the temperature of the heating point can be accurately known. Because it must have two conductors of different materials, it is called a thermocouple. Thermocouples made of different materials are used in different temperature ranges and their sensitivities vary. Extended answer: A temperature sensor is a sensor that senses temperature and converts it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into two categories: thermal resistance and thermocouple.
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