What is the purpose of a thermistor?
Thermistors are thermally sensitive resistors whose prime function is to exhibit a large, predictable and precise change in electrical resistance when subjected to a corresponding change in body temperature.
What happens if a thermistor fails?
When a thermistor is failing, it’ll display incorrect temperatures, or you’ll see impossible temperature fluctuations. When a thermistor in a car is failing, the AC system will blow cold air for a short time or the blower will stop functioning correctly.
Which is the thermistor material?
Thermistors are made from semiconductor materials, typically metallic oxides, using cobalt, manganese, or nickel. The temperature–resistance relationship in a thermistor is nonlinear and negative, as shown in Equation 1.10.
Is a thermistor a sensor?
Thermistors, derived from the term thermaIly sensitive resistors, are a very accurate and cost- effective sensor for measuring temperature. Available in 2 types, NTC (negative temperature coefficient) and PTC (positive temperature coefficient), it is the NTC thermistor that is commonly used to measure temperature.
How do you use a thermistor in a circuit?
To use an NTC thermistor in a detection circuit, put a small voltage across the thermistor. The resistance of the thermistor will reflect the temperature, with its resistance dropping rapidly as temperature increases.
How does a thermistor work in a freezer?
In freezing and refrigeration, a thermistor is a crucial component that is responsible for allowing systems to stay within a short temperature range. Thermistors can gauge temperatures and then react based on the readings. For instance, cooling cycles will be turned on when the temperature of a refrigerator rises.
How much does it cost to replace a thermistor?
For an indoor Aircon thermistor, it will typically cost between $90 – $160. Depending on the brand, and whether it is brand new. Outdoor Aircon thermistor price could cost between $150 – $250. Again, it depends on brand, new or refurbished and also how many sets of thermistor you are looking at.