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Temperature Sensors - NTC Thermistors

PX502J2 Application Field and Working Principle

NTC Thermistors have applications in temperature sensing. They are used in many consumer electronics, domestic appliances, heating/cooling systems, automotive and industrial temperature control applications. The PX502J2 is a precision discrete NTC Thermistor, designed to measure temperature in a wide range of applications.

A thermistor is a temperature-sensitive device made of semiconductor material with a negative temperature coefficient (NTC) resistance-temperature relationship. The PX502J2 is designed to measure both absolute temperature and temperature differences in a wide range of temperatures. It includes a thermistor element, a built-in temperature sensor and a junction thermistor circuit.

The thermistor element is a bead of semiconductor material with a low thermal conductivity. The thermistor is mounted in a case which is filled with a dielectric such as air, gas, or a liquid. This case acts as a shield from external temperatures, allowing only the temperature of the thermistor to be measured. The thermistor is connected to a junction thermistor circuit which acts as a temperature sensor. The temperature sensor measures the junction voltage between the thermistor and the junction. This voltage is then converted to a temperature according to the NTC resistance-temperature relationship.

The PX502J2 has a high accuracy and wide temperature range. It can accurately measure temperatures from -20°C to 250°C. It also has a low self-heating effect, meaning that it is not significantly affected by its own heating when in use. Additionally, the PX502J2 has a long lifetime and is designed to withstand shock and vibration, making it ideal for use in rugged or harsh environments.

In conclusion, the PX502J2 is an accurate, reliable and durable NTC thermistor which is suitable for a wide range of applications. It can measure both absolute temperatures and temperature differences in a wide range of temperatures, making it a great choice for temperature sensing applications.

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