This video outlines 3 great Arduino temperature sensors for use in your personal projects, including the LM34 (LM35), DS18B20, and DS3231 real-time clock. So, whether you are building a temperature logger or a feedback controller, this video will help you determine which sensor is best for your project.

The LM34 temperature sensor measures Farenheit at 10mV/degree, so it is very easy to program using Arduino. It is an analog temperature sensor, so you need 1 analog pin on the Arduino for each sensor. The sensor updates continuously, so it is good for high speed measurement. Be careful however to keep the wires as short as possible or use shielding, as it can be subject to interference.

The DS18B20 uses the 1-wire library to communicate with the Arduino. It has an accuracy of ±2°C. The cool thing is that you can connect multiple DS18B20 sensors to the Arduino on a single digital input. The DS18B20 can be used far away from the Arduino, so they are great for measurements in applications such as a greenhouse.

The DS3231 is a real-time clock (rtc) that is compatible with Arduino. It can keep track of the day, month, year, hour, minute, second, and yes…even the temperature. This makes this module a good fit for an Arduino temperature data logger.