121-103FAC-Q02

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NTC thermistor temperature sensors are a type of temperature sensing device that measures the temperature dependent resistance of a material, usually a metal oxide. The resistance changes when the material is exposed to a changing temperature. NTC thermistors are commonly used in many industrial and consumer applications because of their accuracy, reliability and low cost. The 121-103FAC-Q02 is an example of a NTC thermistor temperature sensor typically used in industrial applications.

Application Field

The 121-103FAC-Q02 is a two-wire self-powered temperature sensor. It is commonly used in thermal imagers, air conditioners, automotive systems, home appliances, medical equipment, telecommunication systems, smoke detectors, medical imaging, temperature controllers, and other industries. For instance, in home appliances such as ovens, air conditioners, refrigerators, or water heaters, sensors are used to measure the ambient temperature. In medical equipment, such as EKG monitors and respiratory monitors, an NTC thermistor temperature sensor can monitor patient temperature in real-time.

Working Principle

The thermistor measures the temperature by means of a special material that has a negative temperature coefficient (NTC) that enables the resistance of the thermistor to increase as the temperature decreases. This type of temperature sensor is also called a Bolometer. The resistance of the thermistor is measured by placing it in a circuit to obtain an electrical reading. This reading can then be measured by a microprocessor and converted to either Celsius or Fahrenheit. The microprocessor can use this data to activate, for example, a heater or cooling device.

The circuit itself usually consists of a positive voltage supply and a load resistor. When a voltage is applied across the thermistor, the resistance increases with a decrease in temperature, thus increasing the total resistance of the circuit. This resistance can then be measured with a specialized voltage measuring circuit or the microprocessor. The electrical resistance of the NTC thermistor can also be calibrated so that different resistance readings can be obtained for different temperatures.

The advantage of a thermistor is that it provides greater accuracy than traditional temperature measuring devices. The thermistor also has a wide range of temperature measurement and can handle temperatures ranging from -50°C to +150°C.

Conclusion

The 121-103FAC-Q02 is an example of a NTC thermistor temperature sensor typically used in industrial applications. It is a two-wire self-powered temperature sensor with a negative temperature coefficient (NTC) that enables the resistance of the thermistor to increase as the temperature decreases. This type of temperature sensor is commonly used in thermal imagers, air conditioners, automotive systems, home appliances, medical equipment, telecommunication systems, smoke detectors, medical imaging, temperature controllers, and other industries. The thermistor has a wide temperature range and can handle temperatures ranging from -50°C to +150°C. It also offers greater accuracy than traditional temperature measuring devices.

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