The Grove - Air Quality Sensor v1.3 is an Arduino-compatible Grove module for indoor air-quality indication and harmful-gas detection projects. It uses the MP503 gas sensor and provides an analog output that can respond to carbon monoxide, alcohol, acetone, thinner, formaldehyde, and other slightly toxic gases. The module supports both 3.3V and 5V power supplies and is documented for Arduino, Raspberry Pi, and ESP-IDF workflows, making it easy to add air-quality feedback to prototypes and monitoring devices. Key Features Wide target-gas response: responds to carbon monoxide, alcohol, acetone, thinner, formaldehyde, and other slightly toxic gases. High sensitivity: reflects target-gas concentration through changes in sensor conductivity. Low-power, stable design: long life and low power consumption help maintain stable measurements over time. Grove-ready integration: compatible with 3.3V and 5V systems for Arduino, Raspberry Pi, and similar platforms. Beginner-friendly documentation: Seeed's Wiki includes wiring examples, sample code, and platform setup guidance. Applications Indoor air-quality monitoring Harmful-gas indication for homes and offices Automatic exhaust, ventilation, and air-cleaner trigger projects Environmental sensing prototypes and education projects Other Content This sensor is best used for qualitative air-quality indication or threshold monitoring, rather than precise laboratory-grade gas concentration measurement. Long exposure to highly polluted air can significantly weaken sensor sensitivity. When using the Grove Base Hat for Raspberry Pi, match the analog port carefully: the board silkscreen may show A1/A0 while sample commands use 0/1, so choosing the wrong port can cause pin conflicts. Specifications Sensor MP503 Output Analog signal Supply Voltage 3.3V or 5V Supported Platforms Arduino, Raspberry Pi, ESP-IDF Dimensions 40 mm x 20 mm x 15 mm Weight 11 g Part List Grove - Air Quality Sensor v1.3 1 Grove Cable 1 Resources Seeed Studio Wiki: Grove - Air Quality Sensor v1.3 setup and examples AirQuality Sensor Arduino library ZIP Grove Air Quality Sensor v1.3 schematic PDF Grove Air Quality Sensor v1.3 schematic and PCB files ZIP MP503 air quality sensor datasheet in English FAQ Can this sensor measure exact gas concentration? No. It is better suited for qualitative air-quality indication and threshold-based projects than precise concentration measurement. Which gases can it respond to? It can respond to carbon monoxide, alcohol, acetone, thinner, formaldehyde, and other slightly toxic gases. Which development platforms are documented? Seeed's Wiki provides examples and setup information for Arduino, Raspberry Pi, and ESP-IDF workflows.
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