PS222J2

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Temperature Sensors - NTC Thermistors

NTC thermistors, also referred to as negative temperature coefficient (NTC) thermistors, are temperature-sensitive, semiconductor-like components that have an electrical resistance proportional to temperature. The thermal response of NTC thermistors is based on the increase of electrical resistance of the circuit with the decrease in temperature. They can be used in a wide variety of temperature measurement and control applications, ranging from simple temperature gauges and thermostats to more sophisticated integrated sensing systems.

PS222J2 Application Field and Working Principle

PS222J2 is an NTC epoxy thermistor from an international sensor manufacturer, which is designed for general purpose temperature sensing applications in the automotive and industrial sectors. It is a precision component, made of a proprietary blend of crystalline material, and it exhibits excellent performance characteristics.

The PS222J2 has a temperature range from -40°C to 125°C, and its accuracy is rated to ±2°C. It also has an exceptionally low thermal resistance and fast response time, which makes it highly suitable for applications such as automotive engine temperature sensing, fan speed control, and door and window switches.

The working principle of the PS222J2 NTC thermistor is simple. When a voltage is applied across its leads, the epoxy material within the thermistor converts the voltage into heat energy. This causes the thermistor to increase in temperature, and this in turn causes the electrical resistance of the circuit to also increase. The amount of heat energy required for a given change in temperature depends upon the resistance value of the thermistor and the ambient temperature.

When the voltage across the thermistor is removed, the device then cools and the electrical resistance of the circuit decreases. The rate at which the thermistor cools is dependent on the ambient temperature and the thermal time constant of the thermistor.

The PS222J2 NTC thermistor is an ideal device for a wide variety of temperature sensing applications. Its fast response time and accurate temperature measurement make it highly suitable for tasks such as monitoring engine temperature, providing feedback for speed control applications, and actuating door and window switches.

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