A thermistor is a temperature-sensing element composed of sintered semiconductor material which exhibits a large change in resistance proportional to a small change in temperature. Thermistors usually have negative temperature coefficients which means the resistance of the thermistor decreases as the temperature increases.
The experimental setup with steel case and integral power supply helps to study the characteristics of the Thermistor.
- To draw the resistance temperature characteristics of a thermistor.
- To find the temperature co-efficient of resistance of the thermistor.
The setup consists of the following specifications:
- Transducer : Thermistor ( NTC type ) 100 Ohm.
- Oven : Temperature control bath.
- Temperature range : Ambient temperature to 110 degree centigrade.
- Temperature controller with Digital temperature indicator.
- Output : Measured by Digital Voltmeter : 0 – 20 V, 3 ½ digit Digital Display.
- Temperature indicator : 3 ½ digit Digital Display.
- IC regulated power supply : + 5 V @500 mA.
- Bridge Network.