Eujgoov Multifunction Air Quality Sensor Module User Manual

1. Introduction

This manual provides comprehensive instructions for the Eujgoov Multifunction Air Quality Sensor Module. This advanced module is designed for precise monitoring of various air quality parameters, including PM2.5, PM10, Carbon Dioxide (CO2), Formaldehyde (CH2O), Total Volatile Organic Compounds (TVOC), temperature, and humidity. It is suitable for integration into gas detectors, air conditioners, air quality monitoring systems, air purifiers, HVAC systems, and smart home applications.

2. Product Features

• Multifunctionality: Integrates a dust sensor, infrared carbon dioxide sensor, electrochemical sensor, VOC sensor, and a temperature and humidity sensor into a single module.
• Comprehensive Data Output: Simultaneously outputs seven sets of data: carbon dioxide, formaldehyde (CH2O), TVOC, PM2.5, PM10, temperature, and humidity.
• Wide Application: Ideal for use in gas detectors, air conditioners, air quality monitoring devices, air purifiers, HVAC systems, and smart home IAQ systems.
• High Sensitivity: Features high accuracy with temperature measurements precise to 0.01°C and humidity measurements accurate to 0.04%.
• Efficient Operation: Only CO2, CH2O, and TVOC parameters require a brief preheating period; other parameters are displayed immediately upon power-on.

3. Specifications

3.1. Measurement Parameters

3.2. General Specifications

• Output Method: 485 Protocol
• Physical Interface: XH2.54 Female Socket
• Working Voltage: 5.0VDC
• Working Current: ≤80mA
• Working Temperature: 0°C ~ 50°C
• Working Humidity: ≤95%RH
• Preheating Time: 2 Minutes (for CO2, CH2O, and TVOC only)
• Service Life: 5 Years (in air)
• Item Weight: 1.76 ounces
• Package Dimensions: 4.49 x 2.48 x 0.71 inches

4. Package Contents

The package includes the following items:

• 1 x Air Quality Sensor Module
• 1 x Data Cable

5. Setup and Installation

The Eujgoov Air Quality Sensor Module is designed for direct installation and use. Follow the steps below for proper connection.

5.1. Physical Connections

The module utilizes an XH2.54 Female Socket for connections. Refer to the pinout diagram and table below for correct wiring.

Figure 1: Front view of the sensor module with pin labels and connection diagrams. This image displays the front of the sensor module, highlighting the TX, NC, GND, and VDD pins. To its right, two connection diagrams illustrate how to interface the module using either the 485 Protocol (A, B, GND, 5V) or UART (RXD, N/A, GND, 5V) with an M702 V2.4 system.

Figure 2: Pin Assignment Table. This table provides a clear breakdown of the module's pin functions: Pin 1 for 5V power, Pin 2 for Power ground (GND), Pin 3 as N/A (Dangling), and Pin 4 for UART data output (TXD).

Connect the module to your system using the provided data cable according to the pin definitions:

• Pin 1 (5V): Connect to a stable 5V DC power supply.
• Pin 2 (GND): Connect to the power ground.
• Pin 3 (N/A): This pin is not used and should be left dangling.
• Pin 4 (TXD): This is the UART data output pin. Connect it to the RXD pin of your receiving device for data communication.

The module supports the 485 Protocol for data output. Ensure your receiving system is configured to communicate via this protocol.

6. Operating Instructions

Once properly connected and powered, the module will begin monitoring air quality. Note the following operational characteristics:

• Preheating: Carbon Dioxide (CO2), Formaldehyde (CH2O), and Total Volatile Organic Compounds (TVOC) sensors require approximately 2 minutes of preheating time to stabilize and provide accurate readings.
• Immediate Readings: All other parameters, including PM2.5, PM10, temperature, and humidity, will display readings immediately upon power-on without a preheating delay.
• Data Output: The module continuously outputs data for all seven parameters via the 485 Protocol through the TXD pin. Your connected system should be programmed to read and interpret this data stream.

Figure 3: Multifunction Air Quality Sensor Module. An angled perspective of the Eujgoov Air Quality Sensor Module, emphasizing its compact design. The accompanying text lists its integrated components: a dust sensor, infrared carbon dioxide sensor, electrochemical formaldehyde sensor, VOC sensor, and temperature and humidity sensor, all contributing to high sensitivity and stable data.

7. Maintenance

To ensure optimal performance and longevity of your Eujgoov Air Quality Sensor Module, consider the following maintenance guidelines:

• Keep Clean: Periodically inspect the module for dust accumulation, especially around the sensor openings. Gently clean with a soft, dry brush or compressed air if necessary. Avoid using liquids or harsh chemicals.
• Environmental Conditions: Operate the module within the specified working temperature (0°C ~ 50°C) and humidity (≤95%RH) ranges. Avoid exposure to extreme conditions, direct water, or corrosive environments.
• Secure Connections: Ensure all electrical connections remain secure and free from corrosion.

8. Troubleshooting

If you encounter issues with your Eujgoov Air Quality Sensor Module, try the following troubleshooting steps:

• No Power/No Readings:
  • Verify that the 5V DC power supply is correctly connected to Pin 1 and ground to Pin 2.
  • Check the power supply voltage to ensure it is within the 5.0VDC specification.
  • Ensure the data cable is securely connected to both the module and your receiving device.
• Inaccurate Readings (CO2, CH2O, TVOC):
  • Allow the module to preheat for at least 2 minutes after power-on before taking readings for these parameters.
  • Ensure the module is not placed in an area with restricted airflow or near sources of high concentration of the gases being measured, which could skew readings.
• Communication Issues:
  • Confirm that your receiving device is configured to communicate using the 485 Protocol.
  • Check the wiring of the TXD pin to the RXD pin of your receiving device.

If problems persist after attempting these steps, please contact Eujgoov customer support for further assistance.

9. Warranty and Support

For information regarding product warranty, returns, or technical support, please refer to the documentation provided at the time of purchase or visit the official Eujgoov website. Keep your purchase receipt or order number handy when contacting support.