What is a thermally sensitive resistor?
Definition. A temperature sensitive resistor has a high enough temperature coefficient of resistance, indicating variation of electrical resistivity with temperature. A temperature sensitive resistor used for the measurement of fluid flow generally takes the form of either hot wire or hot film.
What is B value in thermistor?
A thermistor’s “b” value, or beta value, is an indication of the shape of the curve representing the relationship between resistance and temperature of an NTC thermistor.
What is thermistor 12th physics?
Thermistor is a type of resistor whose resistance changes rapidly with the small change in temperature. In other words, it is a type of resistor in which the flow of electric current changes rapidly with small change in temperature. The word thermistor is derived from the combination of words “thermal” and “resistor”.
What is a 10k NTC thermistor?
– A 10k NTC thermistor displays 10k ohm resistance at 25°C and has a negative relationship between temperature and resistance. – A 100k PTC thermistor displays 100k ohm resistance at 25°C and has a positive temperature-resistance relationship.
What is alpha and beta in thermistor?
There are four basic ways the NTC thermistor industry defines the R/T curve characteristics of a NTC thermistor: by the Steinhart-Hart equation, by the Resistance Ratio between two temperature points, the Beta value (β), and/or the Alpha (α) or Negative Temperature Coefficient [NTC] at 25 °C.
How do you read the thermistor value?
Thermistor Specifications Usually expressed in percent (e.g. 1%, 10%, etc). For example, if the specified resistance at 25°C for a thermistor with 10% tolerance is 10,000 ohms then the measured resistance at that temperature can range from 9,000 ohms to 11000 ohms.
Is NTC a thermocouple?
NTC thermistors and thermocouples both operate within a wide range of temperatures, making them both ideal for a wide range of applications. NTC thermistors perform well in an operating range between -50 to 250 °C while thermocouples operate within the widest temperature range from -200 °C to 1750 °C.