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source:Industry News release time:2023-02-15 Hits: Popular:Infrared sensing module
The B value is the material constant of the thermistor, that is, the chip (a semiconductor ceramics) of the thermistor resistor (a semiconductor ceramics) forms a material with a certain resistivity after a high temperature sintering. There is only one B value at each formula and sintering temperature. So it is called material constant.
The B value can be calculated by measuring the resistance value at 25 ° C and 50 ° C (or 85 ° C). The B value is positively correlated with the product resistance temperature coefficient, which means that the larger the B value, the larger the resistance temperature coefficient.
The temperature coefficient refers to the change rate of the resistance value for every 1 ° C of the temperature. The following formula can be used to replace the B value to the resist temperature coefficient:
Resistance temperature coefficient = B value/t^2 (t is the absolute temperature value to be converted)
The RT table is the normal NTC thermistor RT relationship table, which mainly reflects different resistance values corresponding to NTC in different temperatures. The correct parameters have a very important role in software development.
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