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Where is NTC thermistor used?
NTC thermistors are used as ICLs (inrush current limiters) to protect circuits of electrical and electronic devices against inrush currents easily and effectively.
Which is more accurate thermocouple or NTC thermistor?
NTC thermistors are highly accurate through incremental changes within their operating range. Thermocouples have lower accuracy and require a conversion of millivolts to temperature when used for temperature control and compensation.
How accurate are NTC thermistors?
So, a commercial temperature sensor cannot provide accuracy greater than ±0.002˚C. Thermistors, over their measurement range, are some of the most accurate sensors available. TE’s standard interchangeability values are ±0.2, ±0.1, and ±0.05˚C over the temperature range of 0 to 70˚C.
What is the main reason behind using NTC thermistor?
NTC thermistors are resistors with a negative temperature coefficient, which means that the resistance decreases with increasing temperature. They are primarily used as resistive temperature sensors and current-limiting devices.
Is thermistor a transducer?
Thermistors. The Thermistor is a solid state temperature sensing device which acts a bit like an electrical resistor but is temperature sensitive. Thermistors can be used to produce an analogue output voltage with variations in ambient temperature and as such can be referred to as a transducer.
How much current does a 10K thermistor get?
If you have a 10K thermistor + 10K resistor connected between 5V and ground, you’ll get about 5V / (10K + 10K) = 0.25mA flowing at all times. While this isn’t a lot of current, it will heat up your thermistor as the 10K thermistor will be dissipating about 0.25mA * 2.5V = 0.625 mW.
How does the thermistor connect to the ground?
Connect one end of the 10K resistor to 5V, connect the other end of the 10K 1% resistor to one pin of the thermistor and the other pin of the thermistor to ground. Then connect Analog 0 pin to the ‘center’ of the two.
Which is better a thermocouple or a thermistor?
In general, we think thermistors are higher precision than thermocouples, or most low cost digital sensors, but you will not get better than +-0.1°C accuracy on an Arduino with a 1% thermistor and we would suggest assuming no better than +-0.5°C.
What does 1% error mean on the thermistor?
The thermistor is correct to 1%, which means that at 25°C it can read 10,100 to 9900 ohms. At around 25°C a difference of 450 ohms represents 1°C so 1% error means about +-0.25°C (you may be able to calibrate this away by determining the resistance of the thermistor in a 0°C ice bath and removing any offset).