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An electrical resistor with a relatively large negative temperature coefficient of resistance. Thermistors are useful for measuring temperature and gas flow or wind velocity.
A thermistor can also be called a thermal resistor. It is a semiconductor device made of materials whose resistance varies as a function of temperature. It is used to compensate for temperature variation in other components of an electronic circuit, sometimes taking the place of a fuse with its ability to limit current when overheated by an electrical fault. It is often used as part of temperature control circuitry, among its many other applications.
What else can I help you with?
What is a ntc thermistor?
A NTC thermistor is a temperature sensor that has a "negative temperature coefficient". That means as temperature goes up, the resistance of the device goes down over it's operating range.
What is the relationship between current and voltage in a thermistor?
V=IRR changes as a result of the change in temperature.
Operating range of ntc and ptc thermistor?
That depends on which units we are using. They are models that cover a variety of ranges.
How could a thermistor be used to determine airflow in cubic feet per minute - a thermistor measures temperature changes - how do you change that to cubic feet per minute?
You must have your foudation cubic feet per min first. Then using the thermistor measure the temperature and it should hold steady. The fluctuations in the resistance will show degradations in the airflow. More ohms the less airflow. So Temp % resistance = x Airflow =r known computed airflow =f ix= diff r/f okay. i think i understand.
What is the working principle of the thermistor?
A thermistor changes it's resistance depending on temperature. Hence Thermal-Resistor. (Thermistor) It is all to do with the crystal structure of the substance the thermistor is made of. Some increase their resistance as temperature rises, called Positive Thermal coefficient, 'PTC'. Others reduce their resistance with increasing temperature, called Negative Thermal Coefficient. 'NTC'. They can be used in a feedback loop of a simple amplifier and switch circuits, to control temperature of a device. They can be calibrated for use in a current loop, to directly measure temperature, like a thermometer. They can be used to stop surges in start up circuits, initially giving a high resistance until things warm up. Or used to apply a large current and then reduce as things warm up. (Like in the old degaussing coils on a colour CRT).
What is the symbol of thermistor?
The symbol of a thermistor is a resistor with an arrow pointing towards it.
What kind of thermometer has a thermistor at its end?
A RV absorption refrigerator uses a thermistor as a thermostat. The thermistor is moved up or down to regulate the refrigerator temperature.
How can I test a dryer thermistor to determine if it is functioning properly?
To test a dryer thermistor, you can use a multimeter to measure its resistance. Disconnect the thermistor from the dryer and set the multimeter to the resistance setting. Place the multimeter probes on the thermistor's terminals and check the reading. Compare the reading to the manufacturer's specifications to determine if the thermistor is functioning properly.
What is the relationship between the resistance of a thermistor and temperature?
The resistance of a thermistor decreases as the temperature increases.
How could you change the resistance of the thermistor?
You can modify the resistance of a thermistor by changing its temperature. As the temperature increases, the resistance of a thermistor decreases, and vice versa. By adjusting the surrounding temperature or applying heat or cooling, you can effectively change the resistance of the thermistor.
Is the resistance of a thermistor measured in degrees celsius?
No, the resistance of a thermistor is typically measured in ohms. The relationship between the resistance of a thermistor and temperature is nonlinear, and it is used to calculate the temperature of the thermistor in degrees Celsius.
What happens to a thermistor as it gets colder?
As a thermistor gets colder, its resistance increases. This is because the material in the thermistor contracts, reducing the number of charge carriers available for conduction, hence increasing resistance.
What is thermoresistive?
A thermistor is thermoresistive.
When the temperature increases thermistor resistance decreases?
Yes, that's correct. In a thermistor, which is a type of temperature-sensitive resistor, the resistance decreases as the temperature increases. This is because the conductivity of the thermistor material increases with temperature, causing the resistance to decrease.
What does a thermister do and how does it function in a circuit?
A thermistor is a type of resistor that changes its resistance with temperature. In a circuit, a thermistor is used to measure temperature by detecting the change in its resistance. When the temperature changes, the resistance of the thermistor changes, which can be measured and used to determine the temperature in the circuit.
Is potentiometer and Thermistor are variable resistors. How please explain?
A: A potentiometer is a manual device to change the resistance A thermistor changes as a function of environment temperature
How do you tell if a faulty thermistor?
While some people use a much more exhaustive and precise testing procedure, a very simple test can uncover the most common problems with a thermistor: * measure the resistance of the thermistor at room temperature with an ohmmeter. If this resistance is 0 (short) or infinity (open), then something is connected incorrectly or the thermistor has been destroyed. (These are the most common problems). If that test looks good, then a followup test can uncover nearly all the remaining possible problems with a thermistor: * put icewater in a ziplock bag and press it against the thermistor. Then measure the resistance of the themistor at freezing. The two measured values of resistance are usually adequate to identify what kind of thermistor it is. If both values are practically the same, then it's not really a thermistor -- perhaps someone has accidentally substituted a resistor. If one or both values are not the expected values, perhaps someone has accidentally substituted a different kind of thermistor.
