JS8741A

Series:	JS8741
Part Status:	Active
Resistance in Ohms @ 25°C:	2.7k
Resistance Tolerance:	±5%
B Value Tolerance:	--
B0/50:	--
B25/50:	--
B25/75:	--
B25/85:	3977K
B25/100:	--
Operating Temperature:	-40°C ~ 120°C
Length - Lead Wire:	--
Mounting Type:	Clip On
Package / Case:	Pipe Sensor Assembly

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Temperature Sensors - NTC Thermistors

An NTC thermistor is an electrical device made out of a thermally sensitive semiconductor material, which resistive properties are affected by temperature. The NTC thermistor is a type of temperature sensor which can detect and measure changes in temperature. It has a negative temperature coefficient (NTC) value, which means that it has a negative resistance versus temperature relation. The NTC thermistor has a precision range of -200°C to 300°C, making them well-suited for measuring temperatures in various industrial, medical, and electrical applications.One of the most prominent applications of the NTC thermistor is in combustion engines. In order to ensure proper fuel and air mixtures, the engine must be able to measure the temperature inside the combustion chamber accurately. By mounting a NTC thermistor on the combustion chamber wall, it is possible to accurately measure and control the temperature inside the combustion chamber. This helps to improve the efficiency of the engine by better managing the combustion process.Another common application is to monitor environmental temperature in industrial facilities. By mounting NTC thermistors in strategic locations in the facility, it is possible to accurately monitor the temperature in specific areas of the facility. This helps to ensure that the temperature in these areas are maintained at specified levels. This makes it easier to manage indoor temperatures, improve employee safety, and reduce energy costs.In addition to being used in commercial and industrial applications, NTC thermistors can also be used for temperature sensing in medical equipment and in consumer electronics. In medical equipment, NTC thermistors are used in devices such as stethoscopes, thermometers, and other temperature-sensing instruments. In consumer electronics, NTC thermistors can be used in laptop computers, monitors, air conditioners, and other consumer devices to monitor and control temperature.The JS 8741A is one of the industry’s leading NTC thermistor designs. This thermistor has a tighter bipolar temperature coefficient, which provides an improved accuracy. The bipolar temperature coefficient is calculated from the resistance value at two reference temperatures – 25°C and 85°C. The JS 8741A thermistor also has a wide temperature range (-55°C to 125°C) and low noise characteristics.The working principle of an NTC thermistor is based on the principle of thermoelectricity, which states that when two different metals are connected and a temperature gradient is applied, an electric current will be generated. When an external temperature is applied to an NTC thermistor, its resistance changes based on the temperature gradient. The resistance of the thermistor is inversely related to the temperature, meaning that as the temperature increases, the resistance decreases and vice versa. This is known as the NTC effect.In most applications, NTC thermistors are connected in an electrical circuit, such as a Wheatstone bridge, which is composed of four resistors. With this setup, a voltage is applied across the bridge and the output is measured. The thermistor’s resistance change is then measured and the corresponding temperature can be determined.In summary, the NTC thermistor is a type of temperature sensor that is used in a variety of applications. It provides accurate temperature readings over a wide range, and can be used to monitor and control temperature in industrial, commercial, and consumer applications. The JS8741A is one of the most popular thermistors used in the industry due to its tight bipolar temperature coefficient and wide temperature range. It works based on the principle of thermoelectricity, and is normally used in electrical circuits with resistive elements.

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