FNIRSI SFD-02 is a compact indoor air quality monitor that tracks formaldehyde (HCHO), TVOC, humidity, and a clear Air Quality Index (AQI) in real time. Thanks to active air intake, a 2.4" HD touchscreen, an automatic audible alarm, and measurement history shown in graphs, it helps you quickly uncover hidden sources of pollution at home, in the office, and even in the car.
Stay informed about what you are really breathing. The FNIRSI SFD-02 combines an electrochemical sensor for selective formaldehyde detection and a semiconductor sensor for TVOC. With smart evaluation, it immediately converts measured values into an easy-to-understand AQI rating (from excellent to severe), so you don’t have to interpret the numbers yourself.
Built-in forced airflow (active ventilation) ensures a steady air supply to the sensors, delivering more accurate and consistent measurements regardless of where the device is placed. The large 2.4" color touchscreen with hardened glass clearly displays HCHO, TVOC, humidity, AQI, battery status, date, and time.
Key features and benefits:
- 4-in-1 measurement: HCHO, TVOC, humidity, and AQI
- Automatic audible alarm when safe limits are exceeded
- User profiles for children, pregnant women, and seniors (more sensitive thresholds)
- History and trend charts to evaluate ventilation or air purifiers
- Sleep mode with visual warning (“smiling guard”)
- Formaldehyde reduction calculator to estimate time and costs based on room and method
- Portable use thanks to a 1000 mAh battery and charging via docking station/USB
Specifications
- Manufacturer
- FNIRSI
- Model
- SFD-02
- Device type
- Air quality monitor / formaldehyde detector
- Measured parameters
- HCHO, TVOC, humidity, air quality rating (AQI)
- Formaldehyde (HCHO) sensor type
- Electrochemical
- TVOC sensor type
- Semiconductor
- Humidity measurement
- Yes
- Formaldehyde (HCHO) measurement range
- 0–0.6 mg/m³
- Formaldehyde measurement resolution
- 0.001 mg/m³
- TVOC measurement range
- 0–1.0 mg/m³
- TVOC measurement resolution
- 0.001 mg/m³
- Humidity measurement range
- 0–99 % RH
- Units
- mg/m³, % RH
- Air quality rating
- AQI with hazard level description
- Air quality rating levels
- Excellent / Good / Mild / Moderate / Severe
- Display
- Color HD touchscreen
- Display size
- 2.4"
- Display cover
- Hardened glass
- Controls
- Touch
- User profiles
- Children / pregnant women / elderly people
- Power supply
- 1000 mAh lithium battery
- Charging method
- Docking station / USB
- Operating mode
- Portable and stationary
- Other functions
- Audible alarm, active ventilation, data logging, clock, sleep mode, formaldehyde reduction calculator
