thermistor unit
Thermistor is a resistance thermometer, or resistance whose resistance depends on temperature. The term is a combination of "heat" and "resistance". It is made of metal oxide, pressed into beads, discs or cylinders, and then encapsulated the thermistor with a gas impermeable material such as epoxy resin or glass.
There are two types of thermistors: negative temperature coefficient (NTC) and positive temperature coefficient (PTC). Using NTC thermistor, when the temperature rises, the resistance will decrease. Conversely, when the temperature decreases, the resistance increases. This type of thermistor is used the most.
PTC thermistors work slightly differently. When the temperature increases, the resistance increases, and when the temperature decreases, the resistance decreases. This type of thermistor is usually used as a fuse.
Generally, the thermistor achieves high accuracy in a limited temperature range of about 50C around the target temperature. The range depends on the base resistance.
The thermistor symbol is:
Thermistors are easy to use, inexpensive, durable, and can predict temperature changes. Although they do not work well in overheated or low temperatures, they are the sensors of choice for applications that measure temperature at the required base point. They are ideal when very precise temperature is required.
Some of the most common uses of thermistors are in digital thermometers. Used to measure the temperature of oil and coolant in automobiles, as well as household appliances such as ovens and refrigerators. But almost all applications that require heating or cooling protection circuits to ensure safety have this purpose. For more complex applications, such as laser stabilized detectors, optical modules and charge-coupled devices, built-in thermistors. For example, a 10kΩ thermistor is a standard built into the laser package.
There are two types of thermistors: negative temperature coefficient (NTC) and positive temperature coefficient (PTC). Using NTC thermistor, when the temperature rises, the resistance will decrease. Conversely, when the temperature decreases, the resistance increases. This type of thermistor is used the most.
PTC thermistors work slightly differently. When the temperature increases, the resistance increases, and when the temperature decreases, the resistance decreases. This type of thermistor is usually used as a fuse.
Generally, the thermistor achieves high accuracy in a limited temperature range of about 50C around the target temperature. The range depends on the base resistance.
The thermistor symbol is:
Thermistors are easy to use, inexpensive, durable, and can predict temperature changes. Although they do not work well in overheated or low temperatures, they are the sensors of choice for applications that measure temperature at the required base point. They are ideal when very precise temperature is required.
Some of the most common uses of thermistors are in digital thermometers. Used to measure the temperature of oil and coolant in automobiles, as well as household appliances such as ovens and refrigerators. But almost all applications that require heating or cooling protection circuits to ensure safety have this purpose. For more complex applications, such as laser stabilized detectors, optical modules and charge-coupled devices, built-in thermistors. For example, a 10kΩ thermistor is a standard built into the laser package.
