5-in-1 Air Quality Monitor | CO2, TVOC, Formaldehyde, Temp & Humidity

5-in-1 Indoor Air Quality Monitor — Know What You're Breathing

Keep your home, office, or workspace environment in check with this compact yet powerful 5-in-1 Air Quality Monitor. In a single device, it simultaneously tracks CO₂ levels, formaldehyde (HCHO), total volatile organic compounds (TVOC), temperature, and humidity — giving you a complete snapshot of your indoor air in real time. Made in Mainland China.

Why Indoor Air Quality Matters

According to the U.S. Environmental Protection Agency (EPA), indoor air can be 2–5 times more polluted than outdoor air. Monitoring your indoor environment is a smart step toward maintaining a fresher, more comfortable living and working space.

Key Features

• Advanced Semiconductor Sensor Technology: Simultaneously monitors CO₂, formaldehyde, TVOC, temperature, and humidity — five critical air quality parameters in one portable device.
• High-Precision Electrochemical Detection: Delivers stable, accurate readings with strong anti-interference capability and low power consumption for long-lasting, reliable performance.
• Color-Coded 2.8" TFT-LCD Display: The large, easy-to-read screen uses distinct font colors (green, yellow, orange, red) to indicate air quality levels at a glance — no guesswork needed.
• No Calibration Required: Simply power on and start monitoring instantly. Ready right out of the box with no setup or calibration steps.
• Optimized Ventilation Design: Multiple ventilation holes promote efficient airflow around the sensors, ensuring accurate readings and better heat dissipation for extended device life.
• USB-C Rechargeable: Built-in 1200mAh battery charges fully in about 1 hour via the included Type-C data cable — no disposable batteries needed.

CO₂ Color Indicator Guide

• 400–800 ppm (Green): Low CO₂ — air is in a normal, healthy state.
• 800–1200 ppm (Green + Yellow): Elevated CO₂ — consider improving ventilation.
• 1200–1500 ppm (Green + Yellow + Orange): High CO₂ — open windows or increase airflow promptly.
• Above 1500 ppm (All bands including Red): Very high CO₂ — ventilate immediately.

Technical Specifications

Button Operation Guide

• Press 1×: Switch temperature unit (°C / °F)
• Press 2×: Toggle sound alert on/off
• Press 3×: Enter calibration interface
• Press 4×: Turn screen off (press once to wake)

What's in the Box

• 1× Air Quality Monitor (Host Unit)
• 1× USB Type-C Data/Charging Cable
• 1× Instruction Manual

Note: This device uses a semiconductor sensor for qualitative detection. Readings provide a general indication of air quality trends and are not intended for certified laboratory-grade quantitative analysis. It detects mixed CO₂ (such as that exhaled by humans) and cannot detect pure industrial CO₂.

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Frequently Asked Questions

Q: What does this 5-in-1 air quality monitor measure?

A: This air quality monitor simultaneously measures five parameters: CO₂ (carbon dioxide) concentration (400–5000 ppm), formaldehyde (HCHO, 0–0.6 mg/m³), total volatile organic compounds (TVOC, 0–2.0 mg/m³), ambient temperature (0–50°C), and relative humidity (0–99% RH). All readings are displayed in real time on the color-coded 2.8" LCD screen.

Q: Does this CO₂ and formaldehyde detector need calibration before use?

A: No calibration is required. Simply charge the unit, power it on, and it begins monitoring immediately. The device is designed for plug-and-play convenience, making it ideal for home, office, classroom, or workshop use.

Q: How long does the battery last, and how do I recharge it?

A: The built-in 1200mAh rechargeable battery charges fully in approximately 1 hour using the included USB Type-C cable. Battery life varies based on screen brightness and usage, but the on-screen battery indicator keeps you informed at all times.

Q: Is this monitor suitable for detecting formaldehyde from new furniture or renovations?

A: Yes — this monitor is well-suited for checking HCHO and TVOC levels in newly furnished rooms, recently renovated spaces, or workshops where wood products, adhesives, or paints may off-gas compounds. It provides a useful qualitative reading to help you decide when to ventilate a space.

Q: What do the different colors on the display mean?

A: The color-coded display uses green, yellow, orange, and red indicator bands corresponding to CO₂ concentration levels. Green (400–800 ppm) signals normal air; yellow appears at 800–1200 ppm indicating elevated CO₂; orange shows at 1200–1500 ppm signaling poor air quality; and red (above 1500 ppm) indicates very high CO₂ — at which point immediate ventilation is strongly recommended.