Product Description
Product Description
The Gravity: SFA40 formaldehyde sensor module SEN0661 is an electrochemical sensing module for measuring formaldehyde (HCHO) in indoor environments. The Gravity: SFA40 Formaldehyde (HCHO) Sensor (0-1000ppb, ±20ppb Accuracy) variant is based on the Sensirion SFA40 sensor chip and is intended for selective detection of low HCHO concentrations. Integrated temperature and humidity sensing from the SHT4x series provides automatic environmental compensation for stable measurement results.
The module uses a Gravity I2C interface for integration into microcontroller-based and air-quality monitoring systems. Low cross-sensitivity to ethanol supports applications where common household vapors should have minimal influence on the formaldehyde reading.
Technical Features
- Electrochemical formaldehyde sensor module for HCHO measurement
- Measurement range: 0 to 1000 ppb
- Accuracy: ±20 ppb
- Detection limit: 20 ppb
- Sensirion SFA40 sensor chip
- Integrated temperature and humidity compensation via SHT4x
- Maximum ethanol cross-sensitivity: below 0.3%
- Gravity I2C interface for microcontrollers and embedded systems
Application Areas
Typical applications include indoor air-quality monitoring, experimental air measurement setups, building and HVAC monitoring, and detection of formaldehyde emissions from furniture, coatings, or construction materials. The module is suitable for development projects, test setups, and stationary air-quality instruments requiring selective HCHO detection in the ppb range.
What's Included
- Gravity: SFA40 HCHO Sensor x1
- Gravity 4pin sensor cable x1
