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What is the resistance of NTC?
NTC Thermistors are non-linear resistors, which alter their resistance characteristics with temperature. The resistance of NTC will decrease as the temperature increases. The manner in which the resistance decreases is related to a constant known in the electronics industry as beta, or ß. Beta is measured in °K.
How is NTC resistance calculated?
The actual resistance values of a particular NTC thermistor are obtained by multiplying the ratio RT/R25 (tabulated value) by the resistance value at 25 °C (specified in the data sheets).
What is a low resistance?
A low resistance measurement is typically a measurement below 1.000 ohm. The lower range on many low resistance ohmmeters will resolve 0.1 micro-ohms. This level of measurement is required to perform a number of low range resistance tests.
What does a negative temperature resistance NTC thermistor do?
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.
What does NTC stand for in resistor category?
NTC stands for “Negative Temperature Coefficient. 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.
What is the temperature coefficient of a NTC?
For example, the temperature coefficient of un-doped silicon is −0.075 K -1 at 20 °C. Even if silicon is used as temperature sensor, NTCs are usually constructed with metal oxides, shaped and sintered together, and have even higher temperature coefficients.
Which is better NTC thermistor or platinum alloy RTD?
As can be seen from the figure, the NTC thermistors have a much steeper resistance-temperature slope compared to platinum alloy RTDs, which translates to better temperature sensitivity.