DFRobot and Sensirion Launch the SFA40 Formaldehyde Module: Combining Low Cross Sensitivity with Precise Quantification

To address the growing market demand for stable, reliable, and easy-to-integrate formaldehyde detection solutions, DFRobot, a global leader in open-source hardware, and Sensirion, a pioneer in sensor technology, today jointly launched the Gravity: SFA40 Formaldehyde (HCHO) Module.

The module integrates Sensirion’s electrochemical sensing technology with DFRobot’s standardized Gravity modular ecosystem, delivering low cross-sensitivity, precise quantification, and seamless integration. It provides developers and enterprises with a reliable, easy-to-deploy solution for formaldehyde measurement in real-world applications.

Sensirion Inside: DFRobot Gravity: SFA40 Formaldehyde Module

The DFRobot Gravity: SFA40 Formaldehyde Module is built around Sensirion's advanced SFA40 sensing chip, fully incorporating the core strengths of its electrochemical detection technology. Through optimized design and system integration, the sensor delivers the following outstanding features:

• Superior Anti-Interference: Cross-sensitivity to ethanol is below 0.3%, effectively avoiding interference from common odors such as alcohol and perfume.
• Built-in Temperature and Humidity Compensation: Integrated SHT4X temperature and humidity sensor enables automatic environmental compensation, enhancing measurement stability.
• Plug and Play: Adopts a standard Gravity 4-Pin interface for quick integration with development platforms such as Arduino and Raspberry Pi.
• Reliable Detection: Measurement range covers 0–2000 ppb, with typical accuracy of ±20 ppb or ±20% of reading (within 0–200 ppb range).

Easy Development to Empower Innovative Applications

The DFRobot Gravity: SFA40 Formaldehyde Module continues the user-friendly nature of the Gravity series, providing comprehensive software and hardware support for developers and makers worldwide:

• Programming-Free Data Reading: Offers an SCI firmware version that enables "plug-and-play" serial data reading, facilitating quick testing and application.
• Graphical Programming Compatibility: Deeply compatible with Mind+ programming software, making it easy for beginners to get started quickly.
• Rich Development Resources: Provides comprehensive Arduino and Python libraries to meet professional development needs.
• Modular and Easy to Integrate: Seamlessly fits into the DFRobot Gravity ecosystem, enabling fast transition from prototype validation to product deployment.
• Compact and Flexible Design: Small footprint with standard mounting holes makes it easy to integrate into various compact devices or existing systems.

Wide Applications Empowering Diverse Scenarios

The DFRobot Gravity: SFA40 Formaldehyde Module will provide core sensing capabilities across multiple sectors:

• Smart Home Monitoring – Realtime integration with air purification systems
• Air Purifiers – Precision formaldehyde sensing for ondemand purification
• Building Ventilation – Control reference for offices, schools, and public spaces
• Portable Detectors – Rapid development of professionalgrade mobile measurement devices

Technical Specifications

• Measurement Range: 0–2000 ppb
• Typical Accuracy: ±20 ppb or ±20% of reading (within 0–200 ppb range)
• Supply Voltage: 3.3-5V
• Operating Temperature: 0–50°C
• Operating Humidity: 10–90% RH
• Operating Current: 80 μA (average @ 2Hz), 2 mA (peak)
• Dimensions: 32 × 22 mm
• Mounting Hole Diameter: φ3.0 mm

DFRobot Marketing Director Ashley Gong commented: "This collaboration with Sensirion addresses a key market need—air quality detection moving toward precise quantification. By combining Sensirion's advanced electrochemical sensing with DFRobot's modular design, the Gravity SFA40 Formaldehyde Module delivers low cross-sensitivity with precise quantification, along with steady output and easy integration. This partnership offers developers a more dependable solution and advances detection technology toward greater robustness and usability."

"This partnership marks a key step in making precise quantification sensing more accessible,” said Dong Zhihong, Channel Manager at Sensirion. “Leveraging the strengths of Sensirion’s SFA40 chip and DFRobot's plug-and-play modular ecosystem, we have created a formaldehyde solution that balances professional performance with easy integration. This collaboration will accelerate lab-grade sensing in real-world applications and drive air quality detection toward more reliable and practical use."

The DFRobot Gravity: SFA40 Formaldehyde Module is now available for purchase on the official DFRobot online store, priced at $49.50.