LM35 Temperature Sensor – Precision Analog Temperature Sensor

The LM35 Temperature Sensor is a precise and easy-to-use analog device designed for accurate temperature measurement. It produces a linear output of 10mV per degree Celsius, which allows direct and reliable temperature readings without the need for complex signal processing or calibration. This simplicity makes the LM35 especially popular in educational, DIY, and professional electronics projects.

The sensor operates over a wide temperature range from –55°C to +150°C and delivers typical accuracy of ±0.5°C at room temperature. Unlike thermistors, the LM35 comes factory calibrated in degrees Celsius, ensuring stable and repeatable results across its operating range. Its low self-heating characteristic helps maintain measurement accuracy, even during continuous operation.

The LM35 works with an operating voltage range of 4V to 20V and provides a low-impedance analog output, making it easy to interface with analog-to-digital converters on microcontrollers such as Arduino, Raspberry Pi, ESP32, ESP8266, PIC, AVR, and STM32. Its low power consumption makes it suitable for battery-powered and energy-efficient systems.

Due to its reliability and straightforward design, the LM35 is widely used in temperature monitoring systems, embedded and Arduino projects, HVAC control systems, home automation setups, medical and laboratory equipment, industrial temperature sensing, weather stations, and battery temperature protection circuits.

Choosing the LM35 Temperature Sensor means selecting a trusted and proven solution for analog temperature measurement. Its combination of accuracy, stability, low power consumption, and ease of interfacing makes it an excellent choice for beginners, students, and professional developers alike.