LM135H

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Temperature readings are essential to the safety and efficiency of many engineering processes, and understanding the principles of temperature sensors and their application can be critical when designing a system. The LM135H is a very popular analog temperature sensor that is capable of producing a digital output signal. In this article, we will explore the application fields of the LM135H and the working principles behind its operation.

Applications of the LM135H

The LM135H is used in a variety of applications, ranging from industrial process control and automotive applications to medical instrumentation. It can be found in applications such as cooling systems, air conditioning systems, home security systems, and energy management systems. Additionally, the LM135H has been used in safety applications such as health monitoring systems as well as measuring temperatures in hazardous locations.

In addition to its widespread industrial applications, the LM135H has also proven to be a popular choice for hobbyist and DIY projects. Due to its easy-to-use interface and its accuracy, the LM135H can be leveraged for monitoring temperature in a wide variety of settings and use cases.

Working Principle of the LM135H

At its core, the LM135H is a precision temperature sensor that is designed to output an analog voltage signal that is proportional to the temperature surrounding the device. It works by varying a junction voltage (Vbe) to measure the ambient temperature, as the LM135H uses as a transistor junction probe as a temperature sensor. When the temperature varies, the transistor junction voltage (Vbe) also varies, which results in a change of the output voltage.

The output voltage of the LM135H is proportional to temperature in a range of –55°C to +150°C. However, the device can also be used in much wider temperature ranges, as the output voltage is still linearly proportional. Additionally, the LM135H can measure temperatures that are much higher than 150°C, as it is also capable of outputting a current signal. This makes the LM135H suitable for measuring temperatures of up to 350°C.

The signal produced by the LM135H can be used to interface with a variety of devices, including amplifiers and comparators. The signal can also be used to interface with a digital control system, as the LM135H is capable of producing a digital output signal that can be used to control the operation of other devices.

Conclusion

The LM135H is a popular analog temperature sensor offering accurate, easy-to-use temperature sensing capabilities. It is used in a variety of applications, ranging from industrial process control to home security and energy management systems. Additionally, the LM135H is capable of producing a digital output signal that can be used to control other devices. Its linear nature and capability to measure temperatures up to 350°C make it a popular choice among DIY enthusiasts and hobbyists.

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