MLX90614ESF Infrared IR Temperature Sensor Module
MLX90614ESF Infrared Temperature Sensor
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Overview
Non-contact infrared temperature sensor module
Based on MLX90614ESF thermopile sensor
Measures object temperature without touching
Communicates via I2C (SMBus compatible)
Works with Arduino, ESP32, Raspberry Pi
Working Principle
Detects infrared radiation emitted by objects
Internal thermopile converts IR energy voltage
Built-in DSP processes signal
Outputs:
Object temperature
Ambient (sensor) temperature
Comps
Operating Voltage: 3V 5V
Current Consumption: ~2mA
Interface: I2C / SMBus
Object Temp Range: -70C to +380C
Ambient Temp Range: -40C to +125C
Accuracy: 0.5C (typical)
Resolution: 0.02C
Field of View (FOV): ~5
Response Rate: ~8Hz
Pin Configuration
VCC 3.3V / 5V
GND Ground
SDA I2C Data
SC
Low-noise amplifier
17-bit ADC
Digital signal processor (DSP)
Features
Non-contact temperature sensing
Factory calibrated (no external calibration needed)
High accuracy & stability
Supports PWM + I2C output
Low power consumption
Works in harsh environments
Applications
Contactless thermometers
Human body temperature measurement
Industrial temperature monitoring
HVAC systems
Food safety monitoring
IoT & smart sensing systems
Moving object temperature measurement
Usage Tips
Maintain proper dield of view
Avoid reflective/metal surfaces
Use averaging/filtering for stable readings
Shield from airflow for accurate results
Advantages
Contactless safe & hygienic
High accuracy and resolution
Easy I2C interfacing
Low power consumption
Reliable for continuous monitoring
Limitations
Accuracy affected by distance & emissivity
Measures surface temperature only
Narrow field of view
Sensitive to environmental conditions
Summary
A non-contact IR temperature sensor
Measures object & ambient temperature
Uses thermopile + DSP for accuratp>Ideal for medical, industrial, and IoT applications