DFRobot - Fermion: Formaldehyde Sensor (Breakout, 0-3ppm MEMS HCHO Detection, Low Power)

Ensure safe indoor air quality with the Fermion MEMS Formaldehyde Sensor (HCHO), a high-sensitivity detector for 0-3ppm gas concentrations. Perfect for HVAC systems, air purifiers, and portable monitors, this low-power sensor delivers fast, reliable results with MEMS technology.

High Sensitivity & Fast Response

The MEMS-based sensor detects HCHO concentrations (0-3ppm) with rapid recovery times, ensuring real-time monitoring for health-critical environments.

Ultra-Low Power Consumption (＜20mA)

Designed for battery-operated devices, the sensor’s minimal power draw extends operational life in portable detectors and IoT deployments.

Compact & Easy to Integrate

At just 13×13×2.5mm, the sensor fits seamlessly into air purifiers, smart wearables, and Arduino/Raspberry Pi projects with analog voltage output.

Durable for Long-Term Use

With a 3-year lifespan and -10°C to 50°C operating range, it withstands diverse environments while avoiding interference from humidity or contaminants.

Precautions for use

• Kindly remove the protective film before usage.
• To prevent exposure to volatile silicon compounds vapors (such as silicone adhesive, hair gel, silicone rubber, or other locations where volatile silicon compounds are present).
• Avoid exposure to high concentrations of corrosive gases (such as H2S, SOX, Cl2, HCl, etc.).
• Prevent contamination from alkalis, alkali metal salts, and halogens.
• Refrain from prolonged exposure to extreme environments (such as high temperatures, high humidity, high pollution).
• Avoid contact with water, condensation, and freezing.
• Minimize excessive vibration, impact, and dropping.
• Please refrain from employing this module in systems that involve personal safety concerns.
• For extended periods of non-usage, it is advisable to preheat the module for at least 24 hours.

• Compact size, measuring only 13*13*2.5mm
• Low power consumption,operating current ＜20mA
• High sensitivity and rapid response recovery
• Advanced MEMS technology

• Air purifiers
• HVAC systems
• Smart wearables
• Portable detectors

• Gas detected: Formaldehyde (HCHO)
• Detection range: 0-3ppm
• Operating voltage: 3.3-5V
• Operating current: ＜20mA
• Output signal: Analog voltage
• Sensitivity: R0(in air)/Rs(in 0.4ppm HCHO) ≥ 1.8
• Operating temperature: -10-50℃
• Operating humidity: 15-90%RH (non-condensing)
• Lifespan: ≥3 years (in air)
• Dimension：13×13 x 2.5mm/ 0.0.51×0.51x0.1"

• Fermion: MEMS Formaldehyde HCHO Gas Detection Sensor (breakout) × 1
• 2.54mm pitch header pin × 1