LM35 temperature sensor module + DuPont line 3PIN for arduino

Description

The LM35 Temperature Sensor Module is a compact, ready-to-use analog temperature sensing board built around the Texas Instruments LM35 precision integrated-circuit temperature sensor. Unlike thermistors that require complex calibration curves, the LM35 provides a linear output voltage directly proportional to temperature in Celsius — 10mV per °C — making it one of the simplest and most accurate analog temperature sensors available for microcontroller projects.

At the heart of the module is the LM35 sensor, which measures temperatures from 0°C to 100°C (or -55°C to +150°C depending on the exact variant) with a typical accuracy of ±0.5°C at 25°C . The output voltage is linearly proportional to temperature without requiring any external calibration or trimming. For example, at 25°C the output is 250mV, and at 50°C it is 500mV. This linear relationship makes the conversion formula straightforward: Temperature (°C) = Vout (mV) / 10.

The module operates from a 4V to 30V DC supply (5V typical for Arduino), drawing only 60µA of current — making it suitable for battery-powered and low-power applications . The output can be connected directly to any microcontroller ADC input (e.g., A0 on Arduino). The module includes onboard decoupling capacitors and is supplied with a 3-pin DuPont cable for quick, solder-free connection to your Arduino or breadboard.

Important Note: The LM35 provides an analog voltage output, not a digital signal. You must use an ADC to read it and apply the conversion formula. The sensor has a low output impedance and is easy to interface, but for accurate readings ensure your ADC reference voltage is stable and known. The standard LM35 has a temperature range of 0°C to 100°C; for negative temperatures, the LM35CZ or LM35CAZ variants are required . The sensor is not waterproof and should be kept dry. Avoid exposing it to temperatures beyond its rated range.

Whether you are building a weather station, a thermostat, a temperature logger, or an educational project, the LM35 module provides a reliable, linear, and easy-to-use solution for analog temperature measurement.

Features

• LM35 precision temperature sensor — Linear 10mV/°C output, no calibration required

• Wide temperature range — 0°C to 100°C (standard variant)

• High accuracy — ±0.5°C at 25°C

• Low power consumption — Only 60µA current draw

• Wide supply voltage — 4V to 30V DC operation

• Direct ADC interface — Output connects directly to any microcontroller ADC input

• Onboard decoupling capacitors — Stable and reliable operation

• 3-pin DuPont cable included — Solder-free connection to Arduino and breadboards

• Compact module form factor — Easy integration into projects

• Wide application range — Weather stations, thermostats, data loggers, education

Technical Specifications