What is Thermistor ? Types of Thermistors | Applications of Thermistor Explained
In this video, what is Thermistor, its working principle, typical characteristics, and different applications of thermistor are explained in detail.
The following topics are covered in the video:
0:00 What is Thermsitor?
1:51 Types of Thermsitor
3:57 NTC Thermistor and its applications
16:11 PTC Thermistor and its applications
Thermistor:
Thermistor is a semiconductor device, whose resistance changes with the temperature. Compared to normal resistors, the change in the resistance with the temperature is large for the thermistors. And that is why they are commonly used in temperature sensing applications.
Types of Thermistor:There are two types of thermistor.
1) NTC Thermistor
2) PTC Thermistor
NTC Thermistor:
These thermistors have negative temperature coefficient of resistance. (with increase in temperature, their resistance reduces)
Material used: Cobalt, Nickel, Iron, Copper and Manganese
Application: Temperature Sensing, Inrush current liming, level sensing
PTC Thermistor:
These thermistors have positive temperature coefficient of resistance. (with increase in temperature, their resistance increases)
Material used: Barium, Lead, Strontium titanate
Applications:
PTC Thermistors are mainly used in applications where a sudden change in the resistance is required with temperature. Such as over current protection, soft starter circuits.Apart from that the Silicon PTC thermistors are also used in a temperature sensing application (as they have linear change in the resistance with temperature)
The NTC thermistors have non-linear response for a change in the resistance with temperature. In this video, the hardware techniques to improve the linearity are also explained. Along with that the effect of self-heating in the thermistor is also discussed.
This video will be useful to all the students of science and engineering in understanding what a thermistor is, types of thermistors, their characteristics, and the applications of thermistors.
The link for the other useful videos:
1) Types of Resistors:
• What is Resistor? Different Types of ...
2) Types of Capacitor:
• Types of Capacitor and their applicat...
3) Heatsink Explained:
• What is Heat Sink? Why Heat Sinks are...
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