Adafruit MLX90632 FIR Remote Thermal Temperature Sensor – Medical Grade STEMMA QT / Qwiic

The Adafruit MLX90632 FIR Temperature Sensor offers non-contact infrared temperature measurement with a 50° field of view, ±0.2°C accuracy in the 35–42°C medical range, extended -20–100°C mode, I2C interface, and STEMMA QT/Qwiic connectors for easy integration.

Remote infrared sensors are unique in their ability to measure something they are pointed at, but not touching, and we’ve been looking for a replacement for the now-discontinued TMP007 for a few years. The Adafruit MLX90632 FIR Temperature Sensor features a compact and low-cost ‘remote’ infrared sensor. These are great when you want to measure the temperature of something very hot or very cold, or maybe something delicate and tough to attach a probe to. 

This sensor has a 50˚ field of view, so it will work best when only a few cm/inches away from the item being measured; otherwise, you’ll be getting an average of a large area.

Melexis is famous for its infrared sensor technology, and the MLX90632 is pick-and-placeable with an I2C interface, which makes it a great match for any microcontroller or microcomputer. This breakout board comes with the MLX90632SLD-DC, B, which is ‘medical grade’. The medical version is factory calibrated with an accuracy of ±0.2˚C within the narrow object temperature range from 35 to 42˚C for medical applications. You can also put it into ‘extended’ mode for measuring object temperatures from -20 to 100˚C. Of course, you can also measure the ‘local’ temperature on the chip as well.

To get you going fast, we spun up a custom-made PCB in the STEMMA QT form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the MLX90632 or to chain them with a wide range of other sensors and accessories using a compatible cable. Please note, the QT Cable is not included, but we have a variety in our Qwiic and STEMMA QT section.

We also include a bit of a header if you want to solder this into a breadboard or perfboard. Level shifting and voltage regulation on board means it will work with any 3V or 5V microcontrollers/microcomputers that have I2C, so it can get you temperature, whether it’s on a classic Arduino-compatible or a Raspberry Pi computer.

Features

MLX90632 Specs

• Factory calibrated
• External ambient and object temperature calculation
• Standard measurement resolution 0.02°C
• Medical measurement resolution 0.01°C
• Supply voltage of 3.3V, supply current 1mA (sleep current less than 2.5uA)
• I2C-compatible digital interface
• Software definable I2C address with 1 LSB bit external address pin
• Field of View of 50°
• Default refresh rate 0.5s, configurable between 16ms and 2s
• Integrated post-calibration option

Specifications

• Product Dimensions: 25.5mm x 17.7mm x 4.7mm
• Product Weight: 1.7g

Package Contents

• 1x Adafruit MLX90632 FIR Remote Thermal Temperature Sensor – Medical Grade STEMMA QT / Qwiic
• 1x 6-pin header