On the selection of temperature sensors

Firstly, it is essential to select the structure of the controller to accurately measure the fluid dynamics or surface temperature of the sensitive components within the required measurement time. The output of the humidity sensor is only the temperature of the sensitive component. In fact, it is often difficult to ensure that the temperature indicated by the controller is the temperature of the other half being measured.
In most cases, when selecting a temperature sensor, the following aspects should be considered:
(1) Does the temperature of the tested object need to be recorded, alarmed, and automatically controlled, and does it require remote measurement and transmission.
(2) The size and accuracy requirements of the temperature measurement range.
(3) Is the size of temperature measuring components moderate,
(4) Can the backwardness of temperature measuring components be incorporated into temperature measurement regulations in places where the temperature of the other half of the measured object changes over time. (5) Is the natural environmental standard of the other half being tested harmful to temperature measuring components? (6) What is the price and is the application convenient.
The selection of temperature sensors mainly depends on the measurement range. When the detection range is estimated to be within the total production range, a platinum resistance controller can be used. In a narrow range, sensors typically must have a relatively high basic resistance to achieve sufficient resistance variation. The sufficient positive voltage variation provided by thermistors is very suitable for the narrow measurement range of these sensor components. If the detection range is very large, platinum thermoelectric anode is more useful. It is best to include the freezing point within this range, as the calibration table of the thermocouple is based on this temperature. The linearity of sensors within a known range can also be an additional condition for selecting sensors.
The response speed is generally expressed as a time constant, which is another fundamental basis for selecting controllers. If you want to monitor the temperature during storage, the time constant is not crucial. Little did they know that when it was necessary to accurately measure the temperature in the moving tube throughout the application process, the time constant became a decision factor in selecting the controller. The time constant of bead shaped thermistors and armored gas exposed platinum thermistors is very small, while the marine camera, which contains platinum thermistors for maintaining waterproof sleeves, has a relatively large time constant. (Pressure sensor)
The measurement of daily dynamic temperature is very complex, and only by continuously detecting and simulating the standards often generated in controller applications as closely as possible can we obtain effective similarities in the daily dynamic characteristics of the controller.