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The DFRobot Fermion MEMS Nitrogen Dioxide (NO₂) Gas Detection Sensor is a compact, high-precision breakout board designed for detecting low concentrations of NO₂ gas in the air. Based on advanced MEMS (Micro-Electro-Mechanical Systems) technology, this sensor offers high sensitivity, low power consumption, and fast response time, making it ideal for applications in air quality monitoring, environmental sensing, smart cities, and industrial safety. With a detection range of 0.1 to 10 ppm, the sensor is capable of identifying even small traces of nitrogen dioxide—a common pollutant generated by vehicle emissions and industrial processes. The sensor provides an analog output proportional to gas concentration, which can be easily read by microcontrollers like Arduino, ESP32, or Raspberry Pi. The breakout board features a Gravity-compatible interface, simplifying connections and integration into various prototyping platforms. Its small size, ease of use, and accurate performance make it suitable for both educational and professional projects where real-time NO₂ monitoring is essential. This sensor is a practical solution for developers and engineers looking to integrate air quality awareness into IoT devices, smart buildings, and environmental sensing networks.

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