Understanding How Thermistors Work Within Controlled Systems

Thermistors are most frequently used to measure the temperature inside devices. When a thermistor is used inside controlled systems, it becomes a small but essential part of larger systems. Temperature controllers are used for displaying the temperature the thermistor is exposed. Thermistors and temperature sensorOnce getting an accurate reading, the thermistor tells a cooler or heater when to turn off or on—to maintain proper temperature of sensors.
A temperature sensor’s job is to send accurate temperature feedback to temperature controllers. A basic current runs through the thermistor, which is initially transmitted to the temperature controller. Resistance changes are converted to voltage changes so that they can be read by the controller. The controller is considered the brains of the systems. It takes information from sensors and then compares that information to the temperature needs of the unit (setpoint). The thermistor can adjust currents, which changes temperatures to match setpoints.
Location of thermistors inside systems changes stability and accuracy of controlled systems. For accurate results, thermistors should be placed near the device requiring temperature controls. When possible, thermistors should be embedded inside devices. It is also possible to attach them using thermally conductive glue or paste.


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