Seeed Studio Studio Grove Air Quality Sensor v1.3 - Winsen MP503 Module w/ Grove Cable

The sensor uses a Winsen MP503 metal oxide semiconductor (MOS) element that responds qualitatively to a range of reducing gases and volatile organic compounds (VOCs), including carbon monoxide, alcohol, acetone, thinner, and formaldehyde. It provides a general air quality indication rather than precise, individual gas concentrations.

The module provides an analog output signal. Using the included Grove cable, connect the module to an analog Grove port on a Seeed Studio Studio base shield, or directly wire the signal pin (typically yellow wire) to an analog input (ADC) pin on your Arduino. The module requires both power (3.3V or 5V) and ground connections.

No, this sensor is not designed or certified for safety-critical applications like carbon monoxide alarms or explosive gas leak detection. It is intended for qualitative indoor air quality trend monitoring and should not be relied upon for life safety. For safety applications, use specifically certified and calibrated sensors.

MOS sensors like the MP503 can experience a temporary reduction in sensitivity when exposed to high concentrations of target gases for extended periods. This is a known characteristic of the technology. Sensitivity often recovers after operating in clean air. For consistent long-term monitoring, periodic baseline calibration in clean air is recommended.