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The Fermion MEMS Odor/Smell Gas Detection breakout (SEN0571) by DFRobot is a compact (13 × 13 × 2.5 mm), low-power (<20 mA, 3.3–5 V) sensor engineered for qualitative detection of odor-causing gases like H₂S, ethanol, and acetone within a 0.5–50 ppm range. Utilizing advanced MEMS technology, it delivers rapid response and recovery, minimal heat output, and over five years of air-based lifespan. Ideal for breath analysis, spoiled food detection, cabin air monitoring, and personal hygiene applications. Outputs analog voltage; however, it is qualitative—consider DFRobot’s Gravity series for quantitative readings.

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