1. Introduction
This manual provides detailed instructions for the proper use and maintenance of your Tuya WIFI 8 In 1 Air Quality Monitor. This device is designed to accurately detect and display concentrations of various air pollutants and environmental factors, including PM1.0, PM2.5, PM10, Carbon Dioxide (CO2), Formaldehyde (HCHO), Total Volatile Organic Compounds (TVOC), Temperature, and Humidity.
Equipped with a clear LCD display, automatic brightness adjustment, and Tuya APP connectivity, it offers convenient real-time monitoring and data tracking. Its intelligent features like automatic sleep and approach wake-up enhance user experience and energy efficiency. This monitor is suitable for a wide range of applications, from homes and offices to agricultural settings and production warehouses.
Figure 1: Front view of the 8-in-1 monitor displaying various air quality parameters.
2. Key Features
- 8-in-1 Detection: Simultaneously measures PM1.0, PM2.5, PM10, CO2, TVOC, HCHO, Temperature, and Humidity.
- High-Precision Sensors: Utilizes NDIR infrared CO2 sensor, laser particle sensor, semiconductor sensor, optical sensor, and distance sensor for accurate readings.
- LCD Color Display: Large display with automatic brightness adjustment for clear visibility in various lighting conditions.
- Tuya APP Control: Connects to the Tuya APP via WiFi for remote data viewing, parameter settings, and notifications.
- Smart Energy Saving: Features automatic screen off after inactivity and approach wake-up functionality.
- Easy Calibration: Supports both manual and automatic calibration for consistent accuracy.
- AQI Indication: Color-coded air quality index (Good, Poor, Unhealthy) for quick assessment.
- Efficient Heat Dissipation: Designed with numerous ventilation holes for optimal performance and longevity.
- Type-C Charging: Convenient USB Type-C interface for power.
Figure 2: Visual representation of the monitor's key advantages.
3. Package Contents
Please check the package contents upon unboxing:
- 1 x Air Quality Monitor (Model: PV28CW)
- 1 x Type-C Cable
- 1 x Guideline (User Manual)
4. Specifications
| Parameter | Value/Range |
|---|---|
| Material | ABS |
| Color | White |
| Battery | 1 * 350mAh Lithium Battery (included) |
| Display | LCD Color Display |
| Sensors | NDIR Infrared CO2, Laser Particle, Semiconductor, Optical, Distance |
| HCHO Measurement Range | 0-1.999 mg/m³ |
| TVOC Measurement Range | 0-9.999 mg/m³ |
| PM1.0/PM2.5/PM10 Range | 0-1000 μg/m³; ±10 μg/m³ (0-100 μg/m³) or ±10% (100-500 μg/m³) |
| CO2 Measurement Range | 400-5000 PPM; ±(50 + 5% reading) PPM |
| Temperature Range | 0-50 ℃; ±1 ℃ |
| Humidity Range | 0-99% RH; ±5% RH |
| Recharging Method | USB Type-C interface, 5V 2A |
| Item Size | 70 * 84 * 35 mm / 2.76 * 3.31 * 1.38 in |
| Package Weight | 209 g / 7.37 oz |
| Smart Device | Yes |
| Certification | CE |
Figure 3: Device dimensions and rear panel layout.
Figure 4: Rear view of the monitor with model and power input details.
5. Setup
5.1 Charging the Device
Before first use, ensure the device is fully charged. Connect the provided Type-C cable to the monitor's Type-C port and the other end to a 5V 2A USB power adapter (not included).
5.2 Initial Placement
For accurate readings, place the monitor in the desired monitoring area away from direct airflow, heat sources, or strong electromagnetic fields. Allow the device to stabilize for 5-10 minutes after powering on before taking initial readings.
5.3 Tuya APP Connection
- Download the "Tuya Smart" or "Smart Life" app from your smartphone's app store (iOS or Android).
- Register or log in to your Tuya account.
- Power on the air quality monitor. The device will automatically enter pairing mode upon first use.
- In the Tuya app, tap the "+" icon to add a new device.
- Follow the on-screen instructions in the app to connect the monitor to your home WiFi network. Ensure your phone is connected to a 2.4GHz WiFi network during pairing.
- Once connected, you can view real-time data, adjust settings, and receive alerts through the app.
Figure 5: Monitor data accessible via the Tuya mobile application.
6. Operation
6.1 Power On/Off
Press and hold the multi-function button on the back of the device to power it on or off.
6.2 Display Switching
The monitor can switch between displaying HCHO & TVOC values and PM1.0 & PM10 values. Briefly press the multi-function button to toggle between these display modes.
Figure 6: Switching display content using the multi-function button.
6.3 Automatic Brightness Adjustment
The device features an optical sensor that automatically adjusts the screen brightness based on the ambient light, ensuring readability without being overly bright or dim.
Figure 7: Automatic brightness adjustment feature.
6.4 Sleep and Approach Wake-up
To conserve energy, the screen will automatically turn off after 30 seconds of inactivity (this duration can be adjusted in the Tuya APP). The device's sensors continue to transmit data to the cloud even when the screen is off. To wake up the screen, simply wave your hand in front of the monitor.
Figure 8: Screen off to save energy and wake-up gesture.
6.5 Calibration
The monitor supports two calibration methods:
- Manual Calibration: After powering on the device and allowing it to stabilize for 5-10 minutes in a well-ventilated area, press the multi-function button three times consecutively to initiate manual calibration.
- Automatic Calibration: The device will perform an automatic calibration after 24 hours of continuous operation.
6.6 Air Quality Indication (AQI)
The monitor provides a visual indication of air quality based on concentration levels:
- Green: Good air quality
- Orange: Poor air quality
- Red: Unhealthy air quality
Figure 9: Air quality level indications based on gas concentration.
Figure 10: Detailed gas concentration level ranges for different pollutants.
6.7 APP Settings
Through the Tuya APP, you can customize various settings:
- Set PM2.5 and CO2 alarm values.
- Enable/disable alarm sound.
- Switch temperature unit between Celsius (℃) and Fahrenheit (℉).
- Toggle screen off function and set screen off time.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use abrasive cleaners, solvents, or immerse the device in water.
- Ventilation: Ensure the ventilation holes on the device are not blocked to maintain accurate readings and proper heat dissipation.
- Storage: When not in use for extended periods, store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Recharge the battery regularly to prolong its lifespan. Avoid completely draining the battery frequently.
8. Troubleshooting
8.1 Device Not Powering On
- Ensure the device is fully charged. Connect it to a 5V 2A power source using the Type-C cable.
- Press and hold the multi-function button for a few seconds to ensure it's not a short press.
8.2 Inaccurate Readings
- Calibration: Perform a manual calibration in a well-ventilated outdoor area.
- Placement: Ensure the device is not near strong air currents, heat sources, or chemical fumes that could interfere with sensors.
- Sensor Blockage: Check if the ventilation holes are clear of dust or debris.
- Environmental Factors: Extreme temperature or humidity can affect sensor performance. Allow the device to acclimate to the environment.
8.3 Tuya APP Connectivity Issues
- WiFi Network: Ensure your router is broadcasting a 2.4GHz WiFi signal and your phone is connected to it during pairing.
- Signal Strength: Place the monitor within good range of your WiFi router.
- Re-pairing: If issues persist, try resetting the device (refer to the app for specific reset instructions if available) and re-pairing it with the Tuya APP.
- App Version: Ensure your Tuya APP is updated to the latest version.
8.4 Screen Not Waking Up
- Ensure the approach wake-up function is enabled in the Tuya APP settings.
- Wave your hand clearly and close to the device's proximity sensor.
9. User Tips
- For the most accurate CO2 readings, especially after moving the device, allow it to run for at least 30 minutes in the new environment.
- Regularly check the Tuya app for firmware updates to ensure optimal performance and new features.
- Consider placing the monitor in areas where air quality is a concern, such as bedrooms, living rooms, or near cooking areas.
- If you notice consistently high readings for certain pollutants, investigate potential sources (e.g., new furniture for HCHO, poor ventilation for CO2).
10. Warranty and Support
This product comes with a standard manufacturer's warranty. For detailed warranty information, please refer to the warranty card included in your package or contact the seller directly. For technical support, troubleshooting assistance, or any questions regarding your device, please reach out to the customer service provided by your retailer or the manufacturer.
