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What are the selection methods of temperature sensors

Thermocouple is the most commonly used temperature sensor in temperature measurement. Its main advantage is that it has a wide temperature range and can adapt to various atmospheric environments. It is solid, low price, no power supply and the cheapest. The thermocouple consists of two different metal wires (metal A and metal b) connected at one end. When one end of the thermocouple is heated, there is a potential difference in the thermocouple circuit. The measured potential difference can be used to calculate the temperature.

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What is the working principle of the temperature sensor?

The metal will produce a corresponding extension after the ambient temperature changes, so the sensor can convert the signal of this reaction in different ways.The bimetallic sheet is composed of two pieces of metal with different expansion coefficients. With the change of temperature, the expansion degree of material a is higher than that of another metal, causing the metal sheet to bend. The curvature of the bend can be converted into an output signal.

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What should be paid attention to when installing and using the temperature sensor?

For example, the installation position and insertion depth of the thermocouple cannot reflect the real temperature of the furnace. In other words, the thermocouple should not be installed too close to the door and heating, and the insertion depth should be at least 8 ~ 10 times the diameter of the protective tube; The space between the protective sleeve and the wall of the thermocouple is not filled with insulating materials, resulting in heat overflow or cold air intrusion in the furnace. Therefore, the gap between the protective sleeve of the thermocouple and the hole of the furnace wall shall be blocked with insulating materials such as refractory mud or asbestos rope, so as to prevent the convection of cold and hot air from affecting the accuracy of temperature measurement; The cold end of the thermocouple is too close to the furnace body to make the temperature exceed 100 ℃; The installation of thermocouples should avoid strong magnetic field and strong electric field as far as possible, so thermocouples and power cables should not be installed in the same conduit to avoid introducing interference and causing errors; The thermocouple cannot be installed in the area where the measured medium rarely flows. When the thermocouple is used to measure the gas temperature in the pipe, the thermocouple must be installed against the flow direction and fully in contact with the gas.

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What is a temperature sensor?

Temperature transducer refers to a sensor that can sense the temperature and convert it into an available output signal. Temperature sensor is the core part of temperature measuring instrument, which has a wide variety. According to the measurement method, it can be divided into contact type and non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into thermal resistance and thermocouple.

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What are the proper use of pressure sensors and routine maintenance methods

What are the correct methods for daily use and maintenance of pressure sensors: Note the following: 1. Prevent the transmitter from contacting with corrosive or overheated media; 2. Prevent dregs from depositing in the conduit; 3. When measuring the liquid pressure, the pressure port shall be opened next to the process pipeline to prevent slag deposition; 4. When measuring the gas pressure, the pressure port shall be opened on the top of the process pipe, and the transmitter shall also be installed on the upper part of the process pipe, so that the accumulated liquid can be simply written into the process pipe;

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The sensitivity of the pressure sensor does not depend on the size and material structure

Generally speaking, the sensors that need to test the impact force of different products will be different, but many people don't know what kind of sensor to choose. Therefore, this paper introduces several sensors for measuring impact force for your reference.

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Accuracy level and influencing factors of high precision force measuring sensor

What are the accuracy levels and influencing factors of high-precision load cell? The accuracy of the dynamometer tension force sensor generally includes several performance parameters, such as stress relaxation, optimal control, zero output, repetition, sensitivity, optimal control, application operation temperature clearing and compensation, etc. When selecting the tension working pressure and weight sensor of the dynamometer, it is not necessary to blindly select the high-precision and accurate tension working pressure and weight sensor products, but the installation and application of the sensor should be considered.

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