MLX90614 IR Thermometer sensor

Information

MLX90614 sensor is manufactured by Melexis Microelectronics Integrated system, it has two devices embedded in it, one is the infrared thermopile detector (sensing unit) and the other is a signal conditioning DSP device (computational unit). It works based on Stefan-Boltzmann law which states that all objects emits IR energy and the intensity of this energy will be directly proportional to the temperature of that object. The sensing unit in the sensor measures how much IR energy is emitted by a targeted object and the computational unit converts it into temperature value using a 17-bit in-built ADC and outputs the data through I2C communication protocol. The sensor measures both the object temperature and ambient temperature to calibrate the object temperature value. The features of MLX90614 sensor is given below, for more details refer the MLX90614 data-sheet.

Features

• Operating Voltage: 3.6V to 5V
• Object Temperature Range: -70°C to 382.2°C
• Ambient Temperature Range: -40°C to 125°C
• Resolution/Accuracy: 0.02°C

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Setup

In order to use the MLX90614 IR Thermometer sensor use the following settings:

Mandatory

Hardware

MLX90614 IR Thermometer sensor

Types

temperature

Address

<I2C Address>,[I2C Bus] where the I2C bus is optional, followed by either ,o for object or ,a for ambient temperature
Ex: 0x3f,1,o

Other settings can be found at the sensor setup information