Product Description

The MLX90614 Infrared Non-Contact Temperature Sensor Module is a compact, low-cost digital temperature sensing solution designed for high-precision non-contact temperature measurement. It can measure both the sensor’s ambient temperature and the temperature of an object without requiring physical contact.

The sensor is factory calibrated over a wide temperature range and provides high measurement accuracy of up to ±0.5°C within the specified 0°C to 50°C measurement conditions. With a resolution of 0.02°C, it is suitable for applications requiring precise temperature monitoring.

Mounted on a convenient breakout board, the module provides an SMBus-compatible digital interface, I2C pull-up resistors, optional solder jumpers, and customizable PWM output. Its low-power sleep mode and multiple configuration options make it suitable for embedded, industrial, automotive, home appliance, and healthcare applications.

Features and Benefits

• Non-contact infrared temperature measurement
• Small size and low-cost design
• Breakout board for easy integration
• Two types of pins provided on the breakout board
• 10KΩ I2C pull-up resistors
• Optional solder jumpers for I2C pull-ups
• Factory calibrated
• Wide sensor temperature range: -40°C to +125°C
• Wide object temperature range: -70°C to +380°C
• Accuracy up to ±0.5°C under specified conditions
• Measurement resolution of 0.02°C
• High-accuracy calibration options
• SMBus-compatible digital interface
• Available in single-zone and dual-zone versions
• Customizable PWM output
• Sleep mode for reduced power consumption
• Adaptable for 8–16V applications
• Multiple package options
• Suitable for automotive-grade applications
• Supports multi-sensor temperature monitoring

Specifications

Working Principle

The MLX90614 uses infrared radiation emitted by an object to determine its temperature without direct physical contact.

Every object emits infrared radiation according to its temperature. The sensor’s infrared-sensitive detector receives this radiation and converts it into an electrical signal. Internal signal processing then calculates the corresponding temperature.

The measured temperature can be accessed digitally through the SMBus-compatible interface, while the configurable PWM output can also be used for continuous temperature reading in suitable applications.

Non-Contact Temperature Measurement

One of the major advantages of this sensor is that it can measure the temperature of an object without touching its surface.

This makes it useful for applications where:

• The target is moving.
• Physical contact is undesirable.
• The target is difficult to reach.
• Surface temperature needs to be monitored continuously.
• Mechanical contact could interfere with the measurement.

Communication Interface

The sensor provides an SMBus-compatible digital interface, allowing it to communicate with compatible microcontrollers and embedded systems.

The breakout board also provides 10KΩ pull-up resistors for the I2C interface, with optional solder jumpers for configuration.

The digital interface makes the sensor suitable for integration into automated temperature-monitoring systems.

PWM Output

The sensor supports a customizable PWM output, which can be configured for continuous temperature reading in suitable applications.

This provides an alternative method of obtaining temperature information when a digital communication interface is not preferred.

Power-Saving Mode

A sleep mode is available to reduce power consumption when continuous temperature measurement is not required. This can be particularly useful for battery-powered or energy-conscious embedded applications.

Multi-Sensor Operation

The product information indicates that up to 127 sensors can be read through a common two-wire interface in suitable configurations. This enables multiple temperature sensors to be incorporated into larger temperature-monitoring systems.

This feature is useful for applications requiring temperature measurements at multiple locations.

Design and Construction

The sensor is mounted on a compact breakout board, making it easier to integrate into prototype and embedded systems. The board provides accessible connection pins and integrated I2C pull-up resistors.

Optional solder jumpers provide additional flexibility when configuring the I2C interface.

The compact construction makes the module suitable for installation in equipment where space is limited.

Applications

The MLX90614 sensor can be used for:

• High-precision non-contact temperature measurement
• Thermal comfort sensing
• Mobile air-conditioning control
• Residential air-conditioning systems
• Commercial HVAC systems
• Industrial temperature control
• Moving-part temperature monitoring
• Windshield defogging systems
• Automotive applications
• Automotive blind-angle detection systems
• Printers and copiers
• Home appliances
• Healthcare equipment development
• Livestock monitoring
• Movement detection
• Multi-zone temperature control
• Thermal relay and alert systems
• Industrial automation
• Embedded temperature monitoring
• IoT temperature sensing

Package Includes

• 1 × MLX90614 Infrared Non-Contact Temperature Sensor Module

Product Disclaimer

• Temperature accuracy depends on the operating conditions, target properties, distance, field of view, and system configuration.
• The stated ±0.5°C accuracy applies under the specified measurement conditions and should not be assumed across the entire temperature range.
• Non-contact infrared measurement can be affected by emissivity, ambient temperature, airflow, reflective surfaces, and the distance between the sensor and target.
• Actual operating voltage and interface configuration should be verified before connecting the module.
• Product images are for representation only. The actual product may differ slightly in appearance, colour, PCB layout, or component placement.