The FNIRSI SFD-02 High Precision 4-in-1 Indoor Air Quality Monitor is an advanced, smart air quality testing device designed to accurately detect and analyze formaldehyde (HCHO) and TVOC levels in real time. Built for homes, offices, newly renovated rooms, furniture testing, and professional indoor environmental monitoring, this compact touchscreen air quality detector delivers fast, reliable, and easy-to-understand results.

Using electrochemical and semiconductor sensing technology, the SFD-02 provides high-precision measurements with intelligent alerts to help protect health and improve indoor living conditions. With a 2.4-inch HD color touchscreen, long battery life, USB-C fast charging, and smart data analysis features, this device is a complete indoor air safety solution for users in Bangladesh.

Features:

• Real-time detection of formaldehyde (HCHO) and TVOC levels

• 4-in-1 monitoring: HCHO, TVOC, humidity, date and time

• Audible and visual alarms when air quality exceeds set thresholds

• Customizable alert values for formaldehyde and TVOC

• Five-level air quality grading from excellent to severe

• Touchscreen HD color display with adjustable backlight

• Compact, lightweight, and handheld design

• Long-lasting 1000mAh rechargeable lithium battery

• USB Type-C fast charging with support for use while charging

• Historical data recording for long-term air quality tracking

• Spatial averaging for more accurate environmental assessment

• Smart formaldehyde removal calculator based on room size

Specifications:

• Model: SFD-02

• Screen: 2.4-inch tempered glass touch HD color display

• Languages: English, Chinese

• Power Supply: USB Type-C (5V / 2A)

• Battery Capacity: 1000mAh lithium battery

• Charging Time: Approx. 1.5 hours

• Working Time: 8–10 hours continuous use

• Product Size: Approx. 75 × 45 × 95 mm

• Weight: Approx. 193g

Technical Parameters

• Formaldehyde Detection Range: 0 – 2000 PPM

• Formaldehyde Sensor Type: Electrochemical

• Formaldehyde Preheat Time: 5 seconds

• TVOC Detection Range: 0 – 10 mg/m³

• TVOC Sensor Type: Semiconductor

• TVOC Preheat Time: 120 seconds

Formaldehyde Level Classification

• Excellent: 0 – 0.08 mg/m³

• Good: 0.08 – 0.10 mg/m³

• Mild: 0.10 – 0.20 mg/m³

• Moderate: 0.20 – 0.30 mg/m³

• Severe: 0.30 mg/m³ and above

Applications

• Home indoor air quality monitoring

• Office and workplace safety testing

• Newly renovated rooms and furniture inspection

• Child room and bedroom air safety checking

• Rental property inspection

• Real estate handover testing

• Environmental health monitoring

• Laboratory and professional air testing use

How to Use

• Power on the device using the touchscreen

• Allow sensors to complete preheat time

• Place the device in the target room or area

• Monitor real-time HCHO and TVOC values on screen

• Set custom alarm thresholds as required

• Review historical data to track air quality trends

• Use the smart removal calculator for mitigation planning

Product Instructions

• Use in a well-ventilated indoor environment

• Avoid blocking sensor air inlets

• Fully charge before extended use

• Do not expose to extreme heat or moisture

• Calibrate by allowing stabilization after power-on

• Clean outer surface gently, avoid chemicals

• Keep firmware and usage according to manual guidelines

Package Includes

• SFD-02 Indoor Air Quality Monitor × 1

• Packing Box × 1

• User Manual × 1

• USB Type-C Data Cable × 1

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