What is the role of the temperature sensor?

The specific definition of a temperature sensoris a sensor that can be used to sense temperature and convert it into a sensor that can be used to output signals as the temperature changes. The temperature sensor is the core of the temperature measuring instrument, which can be divided into contact type and non-contact type according to the measurement method.

What is the principle of temperature sensor?

What is the role of the temperature sensor?

What is a metal thermal resistance temperature sensor?

What is the principle of temperature sensor?

Generally, in the principle of temperature sensor, one is based on the physical properties of thermal expansion and contraction of materials (such as thermostats in household refrigerators), the other is based on the temperature characteristics of the resistivity of materials (thermistors), and then the thermocouple When the temperature of the junction of two different metals changes, the corresponding electromotive force appears at the other end (cold end), and the temperature changes. Mainly these three.

What is the role of the temperature sensor?

1. A temperature sensor refers to a sensor that can sense temperature and convert it into a usable output signal;

2. The temperature sensor is the core component of the temperature measuring instrument. There are many kinds. According to the measurement method, it can be divided into two types: contact type and non-contact type;

3. According to the characteristics of sensor materials and electronic components, it is divided into two types: thermal resistance and thermocouple. Temperature sensors are divided into various types. Therefore, different types of sensors have different working principles.

What is a metal thermal resistance temperature sensor?

The metal thermal resistance temperature sensor uses the principle that the resistance value of the metal conductor changes with the temperature change to measure the temperature. Most metal thermal resistances are made of pure metal materials. At present, the main materials used are platinum and copper, and manganese, rhodium, carbon and other materials are also used to make thermal resistances.

(1) Platinum thermal resistance

Platinum thermal resistance is characterized by high temperature measurement accuracy and good stability, and is a good material for manufacturing thermal resistance. The working principle of platinum thermal resistance element is that the resistance value of platinum resistance wire changes with the change of temperature. It can be used to measure the temperature in the range of -200～800℃. Its advantages are stable electrical performance, close to linear relationship between temperature and resistance, and high precision.

(2) Copper thermal resistance

Because platinum material is expensive, copper is often used as thermal resistance material in general engineering measurement. The biggest advantage of copper is its low price, easy purification, and good linearity of temperature characteristics in the range of -50-150 °C. The disadvantage is that the resistivity of copper is only a fraction of that of platinum. Therefore, the material used in the metal thermal resistance temperature sensor is thin and long, with poor mechanical strength and large thermal inertia. When used in medium, it is easy to be oxidized and has poor stability. Therefore, the metal thermal resistance temperature sensor can only be used in the medium with low measurement accuracy and low temperature (below 100 ℃) and non-corrosive medium.

T Sensor Tech is a temperature sensor manufacturer which has complete teams from R&D, design, production to sales. The main products are temperature sensors for air, solid and liquid, including food temperature sensors, temperature sensors, pt100/pt1 000 temperature sensors, thermocouple temperature sensors, etc.