Thermistor

Thermistor is another type of resistive sensor. There are many kinds of thermistors available, ranging from inexpensive products to high-precision products. Low-cost, low-precision thermistors can perform simple measurement or threshold detection functions - these resistors require multiple components (such as comparators, reference and discrete resistors), but are very inexpensive and have non-linear resistance-temperature properties, as shown in Figure 2. If you need to measure a wide range of temperatures, you will need to do a lot of linearization. Calibration of several temperature points may be necessary. In order to achieve higher accuracy, more expensive and more tolerant thermistor arrays can be used to help solve this non-linear problem, but the sensitivity of such arrays is usually lower than that of single thermistor.