A thermistor is not exactly a "heat detector" in the sense that it doesn't directly "detect" heat. Instead, it is a type of temperature sensor that changes its electrical resistance with temperature. So, it can be used to
measure temperature, which could help in detecting heat in a system.
There are two main types of thermistors:
- NTC (Negative Temperature Coefficient) thermistor: Its resistance decreases as temperature increases.
- PTC (Positive Temperature Coefficient) thermistor: Its resistance increases as temperature increases.
Thermistors are commonly used in applications like temperature sensing, overcurrent protection, and even as temperature regulators. So, while a thermistor doesn't directly "detect" heat, it can help detect temperature changes, which can then be used to detect heat.