128-402VLD-Q03

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Temperature sensors are devices that measure temperature in a variety of applications. They are used to trigger alarms, indicate system malfunction, or control other devices as required. NTC thermistors are widely used in temperature sensing applications, and 128-402VLD-Q03 is one of the most popular ones.

The 128-402VLD-Q03 is an NTC thermistor with a negative temperature coefficient, meaning it has a resistance that decreases with an increase in temperature. This results in a decrease of electrical current when it is exposed to higher temperatures. Its features include a high sensitivity (+/- 0.01%/°C) and wide temperature range from -50°C to 150°C. It is composed of an NTC thermistor, an SPC lead and a glass bead. The total resistance range is between 28K ohms - 175K ohms at 25°C.

128-402VLD-Q03 can be used in a variety of applications, including temperature measuring and controlling, temperature compensation, over-temperature protection, etc. The most common application for this type of thermistor is temperature sensing and temperature measurement.

In temperature sensing applications, the thermistor is usually placed in contact with a heat source like a heater, motor, or heat exchanger. When the temperature rises or falls above a certain threshold, the thermistor\'s resistance will change proportionally. This change in resistance is detected using a voltage or current regulator. This can then be used to trigger an alarm or to control other devices.

In temperature measurement applications, NTC thermistors can be used to measure ambient temperature as well as the temperature of the object they are in contact with. Thermistors are usually placed inside a housing or sensor package and connected to a suitable voltage or current regulator. When the temperature of the object changes, the thermistor\'s resistance change will generate a voltage signal which can then be used to measure the temperature accurately.

The working principle of 128-402VLD-Q03 is very simple. It has a negative temperature coefficient (NTC) which results in the resistance decreasing with increasing temperature. This resistance change is detected using a suitable voltage or current regulator which can detect a voltage coefficient or current coefficient change in resistance. This voltage or current signal can then be used to measure temperature accurately.

Overall, 128- 402VLD-Q03 is a very popular NTC thermistor with wide applications in temperature sensing and temperature measurement. Its features like high sensitivity and wide temperature range make it suitable for most temperature sensing and measurement applications. The resistance-temperature relationship is linear, making it easy to read signals with good accuracy.

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