The DFRobot Gravity: MEMS Gas Sensor (MiCS-4514) is a compact and low-power multi-gas sensor module based on SGX Sensortech's MiCS-4514 sensor chip. It’s capable of detecting carbon monoxide (CO), alcohol, nitrogen dioxide (NO₂), and ammonia (NH₃) gases with good accuracy and fast response. Designed for air quality monitoring applications, this sensor is ideal for smart homes, environmental monitoring, and robotic sensing.
Utilizing MEMS (Microelectromechanical Systems) technology, the sensor features two independent sensing elements: one for oxidizing gases (e.g., NO₂) and one for reducing gases (e.g., CO, NH₃, alcohol). The module communicates via the I2C protocol, making it easy to interface with microcontrollers like Arduino, Raspberry Pi, or ESP32. It features onboard signal conditioning, making it ready-to-use and reliable for long-term integration.
Features
Detects multiple gases: CO, NH₃, NO₂, alcohol
Dual-channel MEMS sensor: separate oxidizing and reducing gas detection
I2C digital interface: simplifies communication with microcontrollers
Low power consumption, suitable for portable or battery-powered applications
Pre-calibrated and easy to integrate
Compact and modular design compatible with DFRobot’s Gravity series
Operating temperature and humidity ranges support indoor and semi-outdoor use
Ideal for air quality monitoring, gas leak detection, and smart IoT projects
