A temperature transducer 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 it has a wide variety of products. 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.
What factors affect the performance of the temperature sensor? What will be explained in detail for you
One of the influencing factors
The choice of thermocouple temperature measurement point is the most important. The location of the temperature measurement point must be typical and representative for the production process, otherwise it will lose the significance of measurement and control. When the thermocouple is inserted into the location to be measured, heat flow will occur along the length of the sensor. When the ambient temperature is low, there will be heat loss. Resulting thermocouple temperature sensor does not match the temperature of the measured object to generate temperature error. In short, the error caused by heat conduction depends on the insertion depth. The insertion depth is related to the protection tube material. Metal protection tube because of its good thermal conductivity, its insertion depth should be deeper, ceramic materials, thermal insulation performance is good, can be inserted more shallow. For engineering temperature measurement, the insertion depth is also related to the state of the measurement object such as static or flowing. If the measurement of flowing liquid or high-speed airflow temperature is not limited to the above, the insertion depth can be lighter. The specific value should be determined by experiments.
Influencing factors two increase in thermal resistance
If a thermocouple temperature sensor is used at a high temperature, if the measured medium is in a gaseous state, dust deposited on the surface of the protection tube will be fused on the surface to increase the thermal resistance of the protection tube; if the measured medium is a melt, There will be slag deposition during use, which not only increases the response time of the thermocouple, but also makes the indicated temperature low.
The last is heat radiation
The above points are the factors affecting the temperature sensor. Therefore, attention should be paid in the use process. According to the actual situation, the quality of the best test should be guaranteed. Hope to help you!