DKA103B3

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Temperature Sensors - NTC Thermistors

Temperature sensors are used in a variety of applications as devices for measuring the temperature of solids, liquids, and gases. NTC thermistors are resistors whose resistance changes with temperature. As a result, they can be used for measuring temperatures and to provide feedback in temperature control systems. One type of NTC thermistor is the DKA103B3. This specific device is a chip type thermistor with a negative temperature coefficient and is mainly used in temperature control.

Characteristics of DKA103B3

The DKA103B3 is able to detect temperatures in the range of -40°C to 125°C. It has a high resolution of 0.25°C, which makes it a suitable device for precision temperature control. It also has low self-heating, a low thermal time constant, a small size, a wide resistance range, and good long-term stability and reproducibility. Another benefit of this NTC thermistor is that it has a high thermal shock resistance.

Construction of DKA103B3

The DKA103B3 comprises of a ceramic chip and a metal for electrical lead-out. The construction of the chip is made from high-quality alumina or sintered-glass material, and consists of a plated nickel barrier layer which separates the two active layers. The interior of the chip is formed by a ferrite material with an embedded NTC thermistor. The outside edges of the chip also have silver electrodes for electrical connection and connection to the external circuit.

Working Principle

The NTC thermistor in the DKA103B3 works on the principle of the temperature coefficient of resistance, where the resistance decreases as the temperature increases. The NTC thermistor works by the electrons in the material being pinned by the localized energy state of the atoms, resulting in a decrease in the number of available electrons. As a result, the resistance of the material increases as the temperature decreases.

Applications for DKA103B3

The DKA103B3 is designed for a number of temperature sensing application among them being control systems for packaging machinery, food processing, microwave ovens, and other various home appliances. It is also suitable for medical and laboratory equipments as well as automotive industry such as temperature monitoring of engine oil, fuel, and air-conditioners.

Conclusion

The DKA103B3 is an NTC thermistor chip type temperature sensor capable of measuring temperatures in a range of -40°C to 125°C with a resolution of 0.25°C. It has a high thermal shock resistance, good long-term stability and reproducibility, making it ideal for accurate temperature control in industries, laboratory and medical equipments, and automotive applications.

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