DFRobot Gravity SFA40 HCHO Sensor (0–1000 ppb Wide Range, High Accuracy ±20 ppb) - I2C Interface
The DFRobot Gravity SFA40 is a high-precision electrochemical formaldehyde (HCHO) sensor module with a 0–1000 ppb range and ±20 ppb accuracy. Featuring an integrated SHT4x for temperature and humidity compensation, it connects via a plug-and-play Gravity I2C interface for seamless integration with Arduino, Raspberry Pi, ESP32, and other 3.3V/5V microcontroller platforms.
Features
- High-precision electrochemical sensing for formaldehyde (HCHO) with a wide 0–1000 ppb measurement range.
- Excellent accuracy of ±20 ppb and a low detection limit of 20 ppb for sensitive monitoring.
- Integrated SHT4x sensor provides automatic temperature and humidity compensation for stable readings.
- Minimized cross-sensitivity to common interferents like ethanol (<0.3%) for reliable performance.
- Plug-and-play Gravity I2C interface (3.3–5.5V) for easy connection to Arduino, Raspberry Pi, and other MCUs.
Out of stock
The DFRobot Gravity SFA40 HCHO Sensor is engineered around the Sensirion SFA40 electrochemical sensing element, providing specific and reliable detection of formaldehyde vapor. Its core principle involves a gas-permeable membrane and an electrochemical cell that generates a current proportional to the HCHO concentration, ensuring high selectivity and long-term stability.
To maintain accuracy across varying environmental conditions, the module incorporates a Sensirion SHT4x digital sensor for real-time temperature and humidity compensation. This design mitigates measurement drift, making it suitable for continuous monitoring applications in indoor air quality systems, smart HVAC controls, and portable health devices.
Additional Information
| Weight | 0.004 kg |
|---|---|
| Dimensions | 3.2 × 2.2 cm |
