Views: 0 Author: Site Editor Publish Time: 2022-02-07 Origin: Site
The changes in technology, it has affected all walks of life and brought many new things. Temperature sensors also produce different types of sensors. With the help of automation technology, office automation temperature sensors are constantly updated and upgraded to meet temperature detection in the office field and play a huge role in temperature detection.
What is the role of the thermocouple of the office automation temperature sensor in temperature measurement?
What is the measuring range of the office automation temperature sensor?
In which range is the resistance of the office automation temperature sensor controlled?
The thermocouple of the office automation temperature sensor is the most commonly used temperature sensor in temperature measurement. Its main advantages are a wide temperature range and adaptability to various atmospheric environments, and it is strong, low in price, does not require a power supply, and is also the cheapest. A thermocouple is composed 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 temperature can be calculated from the measured potential difference.
However, the relationship between voltage and temperature is non-linear. Since the relationship between voltage and temperature is non-linear, it is necessary to take a second measurement for the reference temperature (Tref) and use the tester's software or hardware to process the voltage-to-temperature conversion in the device. Finally, the thermocouple temperature (Tx) is obtained. Agilent 34970A and 34980A data collectors have built-in measurement capabilities.
In short, thermocouples are the simplest and most versatile temperature sensors, but thermocouples are not suitable for high-precision measurements and applications.
The temperature measurement range of the office automation temperature sensor is the most important performance index of the sensor. Each type of sensor has its specific temperature measurement range. Therefore, the temperature range measured by the user must be considered accurate and comprehensive, neither too narrow nor too wide. According to the law of black body radiation, the change of radiant energy caused by temperature in the short-wave band of the spectrum will exceed the change of radiant energy caused by the emissivity error. Therefore, it is better to choose a shortwave when measuring temperature.
The thermistor of the office automation temperature sensor measures absolute temperature on two lines with better accuracy, but it is more expensive than thermocouples, and the measurable temperature range is also smaller than that of thermocouples. A commonly used thermistor has a resistance of 5 kΩ at 25 °C, and a change in temperature of 1 °C causes a change in resistance of 200Ω. Note that the lead resistance of 10Ω only causes a negligible error of 0.05°C. It is very suitable for power control applications that require fast and sensitive temperature measurements. Small dimensions are advantageous for applications with space requirements, but care must be taken to avoid self-heating errors.
The continuous innovation of technology makes the office automation temperature sensor also upgrade its advantages to meet the temperature detection of people's office environment. Our company has professional staff and a complete logistics system. While ensuring product quality, we can quickly deliver products to your hands. If you want to know more about our company's office automation temperature sensor, please click our company website: https://www.cnjept.com/.
