Thermistor

In this PPT you will see principle,constructionn ,working etc of about thermistor

1. Thermistor Department of Chemical Engineering Submitted by:- Krishna Kant Nayak Student MNIT Jaipur

2. Index Introduction Construction Working Types Advantages Disadvantages Applications References

3. THERMISTOR A temperature sensing element which measures temperature according to change in resistance . It is usually made of a sintered semiconductor material. They can or cannot be self heated. They use ceramic or polymer materials while RTDs use pure metals. They are available in various shapes like disc, rod, washer, etc.

4. CONSTRUCTION

5. WORKING 1/T=A+B*ln(R)+C  

6. TYPES Positive Temperature Coefficient Thermistor Negative Temperature Coefficient Thermistor

7. ADVANTAGES Low cost. Sensitivity is high. Small in size. Good stability. High output signal . Easy to transport.

8. DISADVANTAGES Non-linear output is seen. Not suitable for high temperature measurement. Requires external power supply. S hielded cables should be used to minimize interference. S elf-heating.

9. APPLICATIONS PTC Thermistor Current limiting devices. Timer in degaussing coil Motors Self regulating heaters NTC Thermistor Very low temperature thermometers Digital thermostats In-rush protection devices Battery pack monitors

10. REFERENCES https://www.teamwavelength.com/info/thermistors.php https://en.wikipedia.org/wiki/Thermistor http://www.resistorguide.com/thermistor/ http://www.electronicshub.org/thermistors-types-and-applications/ https://www.elprocus.com/introduction-to-thermistor-types-with-its-workings-and-applications/

11. Thank You!!