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Electrochemical Formaldehyde Sensor Module for Accurate Indoor Air Quality Monitoring
Gravity SFA40 Formaldehyde Sensor is a high accuracy electrochemical sensing module designed for precise detection of formaldehyde HCHO in indoor environments. Based on the Sensirion SFA40 sensor chip it provides reliable measurement of low concentration formaldehyde levels making it suitable for health focused air quality monitoring and environmental sensing applications.
The sensor measures formaldehyde concentrations from zero to one thousand ppb with a low detection threshold of twenty ppb and a typical error margin of plus or minus twenty ppb. Using the Gravity interface it enables easy integration with microcontrollers such as Arduino ESP32 and other development platforms making it ideal for smart home systems building automation research and educational projects.
Key Features
- Electrochemical HCHO Detection
Uses Sensirion SFA40 technology for stable and selective formaldehyde sensing
- Wide Measurement Range
Measures formaldehyde concentration from zero to one thousand ppb
- High Sensitivity At Low Levels
Detects formaldehyde down to twenty ppb for early air quality warning
- Reliable Measurement Accuracy
Typical error margin of plus or minus twenty ppb
- Gravity Interface Compatibility
Enables quick plug and play integration with common microcontroller platforms
The Gravity: SFA40 HCHO Sensor is a high-precision electrochemical module developed to address the most common issue in air quality monitoring: false alarms. This formaldehyde detector, powered by the industry-leading Sensirion SFA40 chip, focuses on HCHO molecules while avoiding common household scents such as alcohol or perfume. With a built-in SHT4x sensor for automated temperature and humidity compensation, this monitoring unit provides dependable data for smart home devices, HVAC systems, and DIY air purifiers.
Zero False Alarms: Anti-Interference Design
Standard sensors frequently increase only because someone peeled an orange or applied hand sanitizer. This electrochemical HCHO sensor addresses this issue by using sophisticated electrode materials with a cross-sensitivity to ethanol of less than 0.3%. It assures that an increasing result signifies genuine formaldehyde, rather than a change in daily household odors.
Laboratory-Grade Sensitivity (20 ppb)
Detecting trace gases needs extreme precision. The Gravity SFA40 module has a detection threshold of only 20 ppb. To put this in context, discovering 20 ppb is the same as finding 20 grains of rice in 15,600 kilos. Whether you're monitoring weak off-gassing from new furniture or performing scientific study, this sensor detects minute changes that other equipment miss.
Plug-and-Play Gravity I2C Interface with Arduino
Applications
- Smart Home Air Guardians: Create a monitor that informs you when new furniture emits formaldehyde.
- Automated ventilation: When HCHO levels reach safe limits (>80 ppb), automatically turn on fans or open windows.
- Smart air purifiers: Create a gadget that only engages filtration when contaminants are present, conserving energy.
- Portable health checkers: Create a handheld logger to monitor air quality in various rooms or new vehicles.
Package Includes:
- Gravity: SFA40 HCHO Sensorx1
- Gravity 4pin sensor cablex1
