1. Introduction
The morayelec ME202W is a wireless liquid level sensor designed for remote monitoring of water and oil tanks. It utilizes a submersible sensor to accurately measure liquid depth and transmits data via WiFi to the Tuya Smart or Smart Life mobile application. This manual provides detailed instructions for setting up, operating, and maintaining your ME202W sensor.
2. Safety Information
- Ensure the power supply voltage matches the device specifications (100-240VAC to DC 5V).
- Do not touch the sensor's diaphragm, as this can cause damage.
- Keep the device away from extreme temperatures and direct sunlight.
- The sensor is rated IP68 for water resistance, but the control box is IP67. Ensure proper installation to prevent water ingress into the control box.
- Only use the provided power adapter.
3. Package Contents
Please check the package for the following items:
- ME202W Liquid Level Sensor (submersible probe with cable)
- Control Box (with WiFi module)
- AC/DC Power Adapter (100-240VAC to 5V DC)
- Mounting Screws
- User Manual (this document, also available as PDF: PDF User Manual)
4. Specifications
| Feature | Specification |
|---|---|
| Product Name | Fluid Level Monitor |
| Model Number | ME202W |
| Application | Water / Oil Tank, Home Automation System |
| Measuring Range | Up to 10m (0m-5m for ME202W/D variant) |
| Accuracy | ±0.5%FS |
| Operating Temperature | -20°C ~ 70°C |
| Power Supply | 100-240VAC to DC 5V (≤100mA@ 5V DC) |
| Network Mode | 2.4G WiFi (IEEE 802.11b/g/n) |
| WiFi Transmission Distance | 30-50m (no obstacle) |
| Operation System | Android, iOS APP |
| Compatible APP | Tuya SmartLife |
| Protection Rating | Sensor: IP68, Control Box: IP67 |
| Control Box Dimensions | 86 x 122 x 55.5 mm (approx.) |
5. Setup Instructions
5.1 Physical Installation
- Mount the control box in a suitable location near the tank, ensuring it is protected from direct weather exposure if not fully sheltered.
- Carefully lower the submersible sensor into the liquid to be measured. Ensure the sensor is fully submerged and hangs freely without touching the sides or bottom of the tank, or any obstructions.
- Connect the sensor cable to the designated port on the control box.
5.2 Power Connection
- Connect the AC/DC power adapter to the control box.
- Plug the power adapter into a standard electrical outlet (100-240VAC). The device will power on.
5.3 App Download and Installation
- Scan the QR code provided in the manual or on the product packaging to download the "Tuya Smart" or "Smart Life" application from your mobile device's app store (available for Android and iOS).
- Install the application on your smartphone.
5.4 Device Pairing with App
- Ensure your smartphone's WiFi and Bluetooth are turned on.
- Open the Tuya Smart or Smart Life app.
- On the control box, press and hold the button for 5 seconds. The LED light will flash rapidly, indicating it's in pairing mode. Release the button.
- In the app, tap "Add Device" (usually a '+' icon) and follow the on-screen instructions. The app should automatically detect the "ME202W Level Sensor".
- Enter your home WiFi network name (SSID) and password. Note: The device only supports 2.4GHz WiFi networks.
- Once connected, the LED light on the control box will stop flashing and remain steadily on. The app will confirm "Connection successful".
Video 1: ME202W Setup and App Connection Guide
6. Operating Instructions
6.1 Monitoring Liquid Level
After successful connection, open the Tuya Smart or Smart Life app to view the liquid level status:
- Liquid Level Ratio: Percentage of the tank filled.
- Liquid Level Depth: Actual measured depth in meters.
- Liquid Level Status: Indicates Normal, Lower alarm, or Full alarm.
- Supply Voltage: Current voltage of the device.
- Historical data and graphs are available for daily, monthly, and yearly views.
6.2 Setting Alarms and Parameters
Navigate to the 'Setting' section within the device interface in the app:
- Liquid maximum depth: Set the total height of the liquid in your tank (e.g., 5.00m). This is 'B' in the diagram.
- Set Max: Configure the percentage for a high-level alarm (e.g., 80%). When the liquid level reaches this percentage of the maximum depth, a 'Full alarm' will be triggered. This is 'C' in the diagram.
- Set Min: Configure the percentage for a low-level alarm (e.g., 20%). When the liquid level drops to this percentage, a 'Lower alarm' will be triggered.
- Level Rate: This refers to the density of the liquid being measured (e.g., 1g/cm³ for water, 0.85g/cm³ for diesel). Ensure this is set correctly for accurate readings.
- Auto Pump Control: Toggle between automatic and manual pump control.
- Pump Mode: Select between 'Supply' (on-Supply / off-Drainage) or 'Drainage' (on-Drainage / off-Supply) modes.
- Pump Switch: Manually start or stop the pump.
6.3 Multi-Tank Monitoring
The app supports monitoring multiple ME202W sensors, allowing you to view the status of several tanks from a single interface. You can create groups for easier management.
6.4 Sharing Device Data
You can share your water tank data with other users through the app's 'Share Device' function, allowing multiple individuals to monitor the liquid levels.
7. Maintenance
- Regularly check the sensor for any buildup or debris that might affect accuracy. Clean gently if necessary, avoiding damage to the diaphragm.
- Ensure the control box is free from moisture and dust.
- Periodically verify the sensor's readings against manual measurements to ensure continued accuracy.
- Keep the app updated to the latest version for optimal performance and new features.
Warning:
Do not touch the diaphragm of the sensor to prevent damage.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not found by app or fails to connect | Incorrect pairing mode, 5GHz WiFi, WiFi signal issues, incorrect password. | Ensure device is in rapid flashing LED mode. Verify your WiFi is 2.4GHz. Check WiFi password. If issues persist, perform a network reset by holding the button for 5 seconds until the LED flashes rapidly, then try adding the device again. |
| Inaccurate liquid level readings | Incorrect 'Liquid maximum depth' or 'Level Rate' settings in app, sensor obstruction, sensor diaphragm damage. | Verify 'Liquid maximum depth' and 'Level Rate' settings in the app. Check for any physical obstructions around the sensor. Ensure the sensor diaphragm is not damaged. |
| No data updates in app | WiFi disconnection, power loss to device. | Check the LED status on the control box (should be steadily on). Ensure the device has power and is connected to WiFi. Restart the device and app if necessary. |
| App shows 'Err_Sensor' | Sensor malfunction or disconnection. | Check the physical connection of the sensor cable to the control box. If the problem persists, the sensor may be faulty. |
9. User Tips
- For Non-Liquid Mediums: This sensor is designed for water and oil. If you intend to use it for other mediums, such as wood pellets, please verify compatibility with the manufacturer as ultrasonic sensors (like the ME201 and ME203 variants) might be more suitable for solid materials, while this submersible sensor is specifically for liquids.
- Wired Measurement Range: The ME202W model is specified for a measurement range of up to 10 meters. Ensure your tank depth is within this range for accurate readings.
- WiFi Frequency: Always remember that the device only connects to 2.4GHz WiFi networks. If you have a dual-band router, ensure your phone is connected to the 2.4GHz band during setup.
10. Warranty and Support
For warranty claims, technical support, or further assistance, please contact your retailer or the manufacturer directly. Refer to your purchase documentation for specific warranty terms and contact information.
11. Frequently Asked Questions (FAQ)
- Q: Can I use this sensor for solid materials like wood pellets?
- A: The ME202W is a submersible sensor designed for liquids (water/oil). For solid materials, an ultrasonic sensor (like the ME201 or ME203 models from morayelec) might be more appropriate. Please consult the manufacturer for specific compatibility.
- Q: What is the maximum measurement range for this wired sensor?
- A: The ME202W model has a maximum measurement range of 10 meters.
- Q: Why is the price so high?
- A: Product pricing is determined by various factors including technology, materials, manufacturing, and market conditions. For specific pricing inquiries, please contact the seller.
- Q: Is there a version of this measuring device available for 25m or 50m?
- A: The ME202 model series can support ranges up to 200m. Please check the product variants or contact the seller for models with 25m or 50m range capabilities.