49D-15 is a plug-in negative temperature coefficient thermistor NTC; product model description 47 for the R25 nominal resistance value of 47 ohms; D-15 for the head diameter D = 15mm.
The main features of the thermistor:
1) higher sensitivity, its resistance temperature coefficient than the metal is greater than 10 to 100 times greater than that of the temperature change of the detection of 10-6 ℃;
Wide operating temperature range, room temperature devices for -55 ℃ to 315 ℃;
Wide operating temperature range, room temperature devices for -55 ℃ to 315 ℃. temperature change;
② wide range of operating temperatures, room temperature devices for -55 ℃ to 315 ℃, high temperature devices for temperatures higher than 315 ℃ (up to 2000 ℃ at present), low-temperature devices for -273 ℃ to -55 ℃;
③ small size, able to measure other thermometers can not be measured by the temperature of the voids, cavities, and blood vessels in the organism;
④Easy to use, resistance value can be selected arbitrarily between 0.1 ~ 100kΩ;
⑤Easy to process into complex shapes, mass production;
⑥Good stability, overload capacity.
Expanded InformationApplications:
Thermistors can also be used as electronic circuit components for instrumentation line temperature compensation and temperature compensation of the cold end of the temperature differential coupling. The use of NTC thermistor self-heating characteristics can realize automatic gain control, constitute the RC oscillator amplitude stabilization circuit, delay circuit and protection circuit.
In the self-heating temperature is much larger than the ambient temperature resistance is also related to the environment of the heat dissipation conditions, so in the flow rate meter, flow meter, gas analyzer, thermal conductivity analysis is often used to make the thermistor this feature, made of special detection components.
PTC thermistors are mainly used for overheating protection of electrical equipment, non-contact relays, constant temperature, automatic gain control, motor startup, time delay, automatic demagnetization of color TVs, fire alarms and temperature compensation.
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