FNIRSI SFD-02 is a desktop indoor air quality tester specially for home renovation, apartment and office air monitoring. It adopts professional electrochemical sensor for formaldehyde (HCHO) and semiconductor sensor for TVOC, simultaneously measuring humidity and evaluating air quality grade. Equipped with a 2.4-inch tempered glass HD touch screen, it supports real-time data, historical trend curve, average value calculation and smart air quality expression reminder. Users can set custom concentration threshold with sound-light alarm when exceeding standard. Built-in 1000mAh rechargeable lithium battery with Type-C charging, English/Chinese bilingual menu, clock and calendar display. It also contains a practical formaldehyde removal time/cost calculator, ideal for newly decorated houses, baby rooms, office space and daily indoor safety inspection.

• 4-in-1 detection: HCHO formaldehyde, TVOC, ambient humidity and AQI air quality evaluation
• Professional electrochemical HCHO sensor + semiconductor TVOC sensor
• Measurement range: HCHO 0~2000ppm; TVOC 0~10mg/m³
• 2.4-inch tempered glass HD touchscreen, adjustable brightness
• Real-time trend curve + historical record + average data analysis
• Customizable HCHO & TVOC threshold, sound-light over-limit alarm
• Smart facial expression reminder, intuitive air quality grading
• Built-in formaldehyde removal calculator (estimate time & cost)
• Built-in 1000mAh rechargeable battery, Type-C charging
• Clock, calendar and bilingual English/Chinese interface
• Compact desktop stand design, suitable for bedroom, living room and office