112-105PAJ-B01

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NTC thermistors, otherwise known as negative temperature coefficient thermistors, are highly sensitive temperature sensors commonly used in a variety of applications. The 112-105PAJ-B01 temperature sensor is one such device. In this article, we will provide some insight into the field of applications the 112-105PAJ-B01 can be used in, as well as explain its working principle.

Fields of Application

The 112-105PAJ-B01 is primarily used in refrigeration for air conditioning. Many room air conditioners today are automated and powered by electronic controls that involve the use of an NTC thermistor. Moreover, the high temperature stability of NTC thermistors makes them ideal for temperature feedback for compressors and evaporators in various refrigeration units. Additionally, NTC thermistors are also used in the laboratory for automated chemical process control. Furthermore, they are used to measure temperatures in food processing and even in medical procedures.

Working Principle of NTC Thermistor

NTC thermistors operate on a simple principle: when exposed to a rise in temperature, the electrical resistance of the device increases and vice versa. The temperature coefficient, or Beta value, of an NTC thermistor is determined by its temperature range. In general, the Beta value of the 112-105PAJ-B01 is between 7450 and 10500, making it versatile for many applications. The Beta value of the device is also related to its operating temperature, with the lower temperature resulting in a lower Beta. This leads to the device providing an effective temperature reading at the operating temperature range.

In operation, NTC thermistors are connected in series with a bias resistor and connected to a voltage source. As the temperature increases, the resistance of the NTC thermistor increases, thus increasing the voltage drop across the device. This voltage drop is then passed to an amplifier, where it is further amplified. This signal is then passed to a control system, where the desired temperature is set. If the temperature is not within the desired range, the control system automatically adjusts the temperature to bring it into the desired range.

Conclusion

NTC thermistors, such as the 112-105PAJ-B01, are highly sensitive temperature sensors can be used in a variety of applications, depending on their temperature range and Beta value. Their working principle is based upon the electrical resistance of the device increasing with a rise in temperature. Thus, when connected to a voltage source, the voltage drop across the device can be amplified and then passed to a control system, which can be used to adjust the temperature as required.

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