MAX30102 Heart Rate and Pulse Oximetry Sensor Module - High Precision SpO2 Detection, I2C Interface, for Arduino and Health Monitoring DIY Projects

The MAX30102 Heart Rate and Pulse Oximetry Sensor Module is an integrated optical biosensor designed for advanced health monitoring and wearable electronics projects. Combining pulse oximetry and heart-rate measurement capabilities, this module utilizes advanced photoplethysmography (PPG) to detect blood oxygen saturation (SpO2) levels and pulse rates non-invasively. Ideal for makers, engineers, and developers working on biometric monitoring systems, fitness trackers, and biomedical prototypes, the MAX30102 delivers laboratory-grade sensing performance in a small form factor that easily integrates into breadboard and custom PCB designs.

At the core of the module is the MAX30102 sensor IC, which incorporates two LEDs, a photodetector, optimized optics, and low-noise analog signal processing to detect pulse oximetry and heart-rate signals. The device measures blood oxygen saturation by emitting light from two LEDs—one red and one infrared—into the skin and measuring the reflected light using the photodetector. Because varying amounts of light are absorbed by arterial blood during pulse beats, the sensor accurately calculates SpO2 levels and heart rate. The internal architecture includes robust ambient light cancellation circuitry, ensuring reliable performance even under varying environmental lighting conditions. Communication with a host microcontroller is handled via a standard I2C interface, simplifying wiring and programming.

The operating voltage for the sensor logic typically ranges from 1.8V to 3.3V, while the LED supply voltage can extend up to 5V depending on the specific breakout board design. The I2C interface supports standard and fast communication modes. The module features internal 18-bit ADCs for high-resolution signal conversion. Current consumption is exceptionally low in shutdown mode, making it well-suited for battery-powered wearable applications. Operating temperature ranges conform to standard commercial electronics specifications, though exact thresholds may vary by module revision.

This biosensor module is exceptionally versatile for a wide range of DIY and professional applications. Common use cases include wearable fitness bands, smart health monitoring pendants, remote patient monitoring proof-of-concept devices, biometric security systems, sleep apnea research monitors, and educational electronics projects focusing on biomedical engineering and signal processing.

When integrating the MAX30102 module into your circuit, ensure proper voltage level shifting if connecting to a 5V microcontroller like an Arduino Uno, as the sensor logic operates at lower voltages. Proper finger placement and minimal motion are critical during measurement to reduce motion artifacts and ensure accurate SpO2 and heart-rate readings. Consult the official Maxim Integrated MAX30102 datasheet for complete register maps, advanced configuration settings, and recommended optical design guidelines.

1x MAX30102 Heart Rate and SpO2 Sensor Module with male header pins