4-in-1 Indoor Air Quality Monitor Formaldehyde Detector with Touchscreen FNIRSI SFD-02

One small monitor – a huge difference for your health

The FNIRSI SFD-02 is an advanced 4-in-1 indoor air quality monitor that measures formaldehyde (HCHO), TVOC, humidity, and air quality hazard level (AQI) in real time. It combines high-precision electrochemical and semiconductor sensors, active ventilation, a clear 2.4" HD touchscreen, intelligent alarms, and analytical functions. It's a complete health care tool for homes, offices, cars, and renovated or rental apartments.

Lab-grade precision in a home monitor

At the heart of the device is a highly sensitive electrochemical sensor, specifically designed for the selective detection of formaldehyde. Advanced interference filtering ensures accurate and stable measurements even at very low concentrations, ensuring you're responding to a real threat, not random fluctuations.

TVOC under constant surveillance – detect hidden sources of pollution

FNIRSI SFD-02 also monitors TVOC – volatile organic compounds emitted among others . through furniture, paints, adhesives, detergents, and new finishing materials. This allows you to quickly identify problematic items or rooms and effectively improve air quality.

Stable measurements thanks to forced air flow

The built-in active air suction system eliminates the effects of external drafts and uneven airflow. The result? A constant airflow to the sensors and more accurate readings, regardless of the device's location.

Clear 2.4” HD touchscreen – everything is clear at a glance

The large tempered glass touchscreen clearly displays: HCHO concentration, TVOC, humidity, AQI, hazard rating, date, time, and battery charge status. Operation is intuitive and user-friendly, even for children and seniors.

Real-time threat assessment – know when to react

Thanks to its powerful processor, the FNIRSI SFD-02 instantly interprets data and presents it as an easy-to-understand air quality rating (Excellent / Good / Mild / Moderate / Severe). You don't have to analyze the numbers – the device itself shows whether the air is safe.

Automatic Audible Alarm – Safety You Can Hear

When formaldehyde or TVOC levels exceed safe levels, the monitor automatically sounds an audible alarm. This ensures you don't miss the threat, even when you're not looking at the screen.

Different household members, different needs – individual safety thresholds

The device offers special settings for children, pregnant women, and the elderly, taking into account their greater sensitivity to pollution. This is a real benefit for families who want to care for their most vulnerable household members.

Measurement history that shows more than a single reading

FNIRSI SFD-02 records historical data and presents it in the form of clear curve graphs, allowing you to observe trends and assess the effectiveness of ventilation or air purification.

Intelligent "smiling guardian" - visual warning in sleep mode

In sleep mode, the screen displays changing facial expressions—the worse the air quality, the "sadder" the face, and at high concentrations, audible warnings are triggered. It's a simple, yet very clear, warning signal.

Formaldehyde Removal Calculator – Plan Your Actions Without Guessing

The built-in formaldehyde reduction calculator helps estimate the time and cost of removing contaminants depending on the room size, HCHO concentration, and the chosen method (ventilation, activated carbon, photocatalysis). This provides practical support for real-world decisions.

Mobility and convenience – 1000 mAh battery and docking station

The built-in 1000 mAh lithium battery and wireless docking station ensure long battery life and convenient charging. You can easily move the monitor between rooms, take it in your car, or use it when you're handing over your apartment after renovations.

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