The MLX90614 is a high-precision non-contact infrared temperature sensor that measures surface temperature by detecting infrared radiation. Featuring an integrated optical system, low-noise amplifier, 17-bit ADC, and DSP-based self-calibration, it delivers fast, accurate, and stable temperature readings. With an I²C interface and compact design, it is ideal for medical monitoring, environmental sensing, smart home automation, automotive electronics, and industrial applications.

Downloadable Resources

Schematics

Datasheet

GitHub

Docs

Tech Specs

Projects

1. Example Code for Arduino-Get Temperature Data

This demo demonstrates how to put the sensor into and out of sleep mode and how to read temperature data from the sensor.

2. Example Code for Arduino-Set Sensor Parameters

This demo shows how to set the emissivity calibration coefficient and configure measurement parameters such as IIR, FIR, and measurement target options.

Reference

Specification

Parameter	Value
Operating Voltage	3.3V – 5V
Operating Current	1.2 mA
Temperature Range	-70.01 °C to +270 °C (0.01 °C resolution)
Interface Type	I²C
Interface Line Sequence	VCC, GND, SCL, SDA
Field of View (FOV)	5°
Dimensions	31.5 × 18 mm (1.24 × 0.7 inches)

Pinout

IR Thermometer Sensor-MLX90614 Interface Instruction

SEN0263 SEN0206 IR Thermometer Sensor-MLX90614 Pin Outs

Label	Name	Function
1	VCC	Positive Terminal
2	GND	Negative Terminal
3	SCL	I2C Clock Pin
4	SDA	I2C Data Pin

Non-Contact Temperature Sensors, How Do They Work?

Mellow_Labs Sep 30, 2025

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