5-in-1 Air Quality Monitor – CO2, TVOC, Formaldehyde, Temp & Humidity
5-in-1 Air Quality Monitor – CO2, TVOC, Formaldehyde, Temp & Humidity
ALLOET 5-in-1 Indoor Air Quality Monitor with LCD Display
Keep your home or office environment safe and comfortable with the ALLOET 5-in-1 Air Quality Monitor. This compact, USB rechargeable device simultaneously tracks CO2 levels, formaldehyde (HCHO), TVOC, temperature, and humidity — giving you a complete real-time picture of your indoor air on a single 2.8-inch color TFT-LCD screen.
Made in Mainland China.
Why Monitor Your Indoor Air?
Indoor air can carry elevated levels of carbon dioxide, volatile organic compounds, and formaldehyde from everyday sources like furniture, cleaning products, and poor ventilation. The U.S. Environmental Protection Agency (EPA) notes that indoor air pollutants can be 2–5 times higher than outdoor levels — making a reliable monitor an essential household tool.
Key Features
- 5 Sensors in 1 Device: Simultaneously monitors CO2 (400–5000 ppm), HCHO (0–0.6 mg/m³), TVOC (0–2.0 mg/m³), temperature (0–50°C / ±1°C accuracy), and humidity (0–99% RH / ±2% RH accuracy).
- Color-Coded Air Quality Alerts: The large screen uses distinct font colors and bar indicators — green for clean air, yellow/orange for elevated levels, red for seriously exceeded thresholds — so you can act immediately without interpreting raw numbers.
- High-Precision Electrochemical CO2 Sensor: Delivers accurate, stable CO2 readings (±150 ppm) with strong anti-interference performance and low power consumption. Note: This device uses a semiconductor sensor best suited for qualitative detection of mixed CO2 (e.g., from human respiration) rather than pure CO2 sources.
- Zero-Calibration Startup: No warm-up or manual calibration required — simply power it on and get instant readings. A calibration mode is available via the button interface for advanced users.
- Ventilated Housing for Accurate Sensing: Multiple ventilation holes on the ABS casing promote consistent airflow around the sensors, ensuring responsive readings and efficient heat dissipation for long device life.
- USB-C Rechargeable: Built-in 1200 mAh lithium battery charges fully in approximately 1 hour via USB Type-C (5V/1A). No disposable batteries needed.
- Intuitive Button Controls: One button cycles through display modes — press once to switch temperature units, twice to toggle audio alerts, three times to enter calibration, four times to turn the screen off (press again to wake).
Full Technical Specifications
| CO2 Range | 400–5000 ppm (±150 ppm) |
| Temperature Range | 0–50°C (±1°C) |
| Humidity Range | 0–99% RH (±2% RH) |
| HCHO Range | 0–0.6 mg/m³ |
| TVOC Range | 0–2.0 mg/m³ |
| Screen Size | 2.8-inch TFT-LCD (240×240 resolution, glass) |
| Response Time | <1 second |
| Battery | 3.7V / 1200 mAh lithium, ~1 hr charge time |
| Charging | USB Type-C, 5V/1A, 600 mA max charge current |
| Casing Material | ABS plastic |
| Dimensions | ~90 × 70 × 35 mm / 3.54 × 2.76 × 1.38 in |
| Origin | Mainland China |
What's in the Box
- 1 × Air Quality Monitor (Host Unit)
- 1 × USB Type-C Data/Charging Cable
- 1 × Instruction Manual
Ideal For
Bedrooms, home offices, nurseries, classrooms, workshops, and any enclosed space where you want confidence in the air you breathe.
Frequently Asked Questions
Q: What does the CO2 color scale mean on the air quality monitor?
A: The monitor uses an intuitive color-bar system. A green bar (400–800 ppm) means CO2 levels are low and air quality is normal. Green + yellow bars (800–1200 ppm) indicate elevated CO2 where ventilation is recommended. Green + yellow + orange bars (1200–1500 ppm) signal poor air quality. If all four bars (green, yellow, orange, and red) appear simultaneously, CO2 has exceeded 1500 ppm and you should open windows immediately for fresh air circulation.
Q: Does this monitor need calibration before first use?
A: No — the ALLOET 5-in-1 Air Quality Monitor requires no initial calibration. Simply charge it and power it on to begin monitoring right away. A manual calibration mode is accessible by pressing the button three times if you ever want to fine-tune readings over time.
Q: Can this device detect pure CO2 from a CO2 tank or gas cylinder?
A: This monitor uses a semiconductor sensor optimized for detecting mixed CO2 as typically found in indoor environments (such as CO2 exhaled by people). It is not designed for precise measurement of pure or concentrated CO2 from industrial gas sources. It's best used as a qualitative indoor air quality tool rather than a laboratory-grade quantitative analyzer.
Q: How long does the battery last on a full charge?
A: The built-in 1200 mAh lithium battery fully charges in approximately 1 hour via USB Type-C. Battery life varies with usage and screen brightness, but the low-power sensor design helps maximize runtime between charges. The screen-off mode (activated by pressing the button four times) can further extend battery life.