Moray ME201R Ultrasonic Water Liquid Depth LCD Temperature Time Display Low Battery Indicator Alarm Tank Level Monitor

1. Introduction

The Moray ME201R is an advanced ultrasonic tank level monitor designed for accurate liquid depth measurement in water and oil tanks. This device integrates temperature display, water level alarm functions, and smart connectivity via the Tuya Smart APP or Smart Life APP. Its reliable distance detection capability, ease of installation, high durability, versatility, and low maintenance costs make it a valuable addition for home automation and monitoring projects.

2. Package Contents

Please check the package contents carefully upon unboxing:

• Ultrasonic Sensor Unit
• Display Unit (Tank Level Monitor)
• Power Adapter (AC/DC 100-240V to 5V DC)
• USB Type-C Cable (0.8m)
• Mounting Screws
• User Manual (this document)

3. Specifications

4. Installation

4.1. Physical Installation of the Sensor

1. Remove the release paper from the gasket and attach the gasket to the center of the tank where the hole will be drilled.
2. Drill a hole in the middle of the tank with a diameter of >55mm.
3. Place the sensor over the gasket, ensuring it is aligned with the screw holes.
4. Fasten the sensor with self-tapping screws. If the mounting surface is curved, it is sufficient to fix the sensor with screws to prevent stress. If data is abnormal, loosen the screws slightly.

Sensor Placement Guidelines:

• Hold the sensor perpendicular to the liquid surface.
• Install the sensor away from the water inlet to avoid pseudo-echoes.
• The sensor installation should not be close to the bulkhead, as this can cause strong pseudo-echoes.
• Ensure there are no obstacles (e.g., pipelines, protruding outlets, floating balls, boards) in the reflective area of the sensor.
• The tank should ideally have a smooth inner wall.

ME201R Series Application Notes:

• The ME201R model is designed for environments without floating balls in the tank.
• It is not applicable for underground water tanks.
• It is not suitable for environments with steam or high humidity, as water droplets on the sensor can cause inaccurate measurements.

4.2. Wiring

1. Connect the ultrasonic sensor unit to the display unit.
2. Connect the power adapter to the display unit using the provided USB Type-C cable.
3. Plug the power adapter into a standard electrical outlet.

4.3. Video Guide for Installation

5. Initial Setup and App Connection

5.1. Network Reset

To reset the network settings of the gateway (display unit):

1. Press and hold the gateway touch key (labeled with a WiFi icon) for 5 seconds.
2. The LED light will flash rapidly.
3. Release the button. The network will reset, and the device will attempt to connect to the network automatically.

5.2. Connecting Gateway to APP

1. Download the "TUYA Smart APP" or "Smart Life APP" from your mobile device's app store.
2. Ensure your mobile phone's WiFi and Bluetooth are turned on.
3. Open the APP and navigate to add a new device.
4. The APP will search for nearby devices. Make sure your device has entered pairing mode (WiFi light flashing rapidly).
5. Select "Liquid Level Monitor" from the discovered devices.
6. Enter your Wi-Fi information (SSID and password). Note: The WiFi frequency must be 2.4GHz, not 5GHz.
7. Confirm the connection. Once successfully added, the device will appear in your app.

Note: When adding a device, ensure that the gateway and your phone are connected to the same 2.4GHz WiFi network. After successful setup, the indicator light on the gateway should be steady. If the phone cannot find the device or fails to connect, hold down the gateway touch key for 5 seconds until the indicator flashes to re-enter pairing mode.

6. Operation

6.1. Display Unit (Gateway)

The display unit provides real-time information and status indicators:

• Battery Indicator: Shows the current battery level of the sensor unit.
• WiFi Light:
  • Flashes rapidly: WiFi configuration mode.
  • On: WiFi connected.
  • Flashes slowly: WiFi disconnected.
• Pump Light: Indicates if the pump is currently operating (on/off).
• Sensor Light:
  • Flashes: Sensor is reporting data.
  • Off: Sensor is not reporting data (e.g., not connected).
• Digital Display: Shows water tank environmental temperature (in ℃) and water tank level percentage (%).

6.2. Mobile App Interface

The Tuya Smart / Smart Life APP provides comprehensive monitoring and control:

• Liquid Level Ratio & Depth: Displays the current liquid level as a percentage and in meters.
• Liquid Level Status: Indicates "Normal", "Full alarm", or "Lower alarm".
• Temperature: Shows the current liquid temperature.
• Sensor Power: Displays the current voltage of the sensor unit.
• History: View historical liquid level data over time (Day, Month, Year).
• Settings: Access various configuration options.

6.3. Alarm Settings

You can configure various alarm parameters within the app's settings:

• Set Max: Define the maximum liquid level percentage for a high-level alarm.
• Set Min: Define the minimum liquid level percentage for a low-level alarm.
• Installation Height: Calibrate the sensor by setting the distance from the sensor to the tank bottom.
• Liquid Maximum Depth: Set the maximum height of liquid in the tank.
• Beep Alarm: Toggle the audible alarm sound on/off for the display unit.

6.4. Optional Pump Control

The device supports optional pump control functionality, which can be configured in the app:

• Auto Pump Control: Enable or disable automatic pump operation.
• Pump Mode: Select between "on-Supply" (pump fills tank) or "off-Drainage" (pump empties tank).
• Pump Switch: Manually start or stop the pump.

7. Maintenance

• Keep both the ultrasonic sensor and the display unit clean and free from dust or debris.
• Regularly inspect the sensor's reflection area inside the tank to ensure there are no new obstacles that could interfere with measurements.
• If you notice abnormal data readings, check the sensor's mounting for excessive stress; slightly loosening the screws might resolve the issue.
• Monitor the sensor's battery level via the display unit or app and replace/recharge as necessary to ensure continuous operation.
• Avoid exposing the ME201R sensor to steam or high humidity environments, as this can lead to condensation and inaccurate readings.

8. Troubleshooting

8.1. Device Not Found / Connection Issues

• Ensure your mobile phone and the gateway are connected to the same 2.4GHz WiFi network. The device does not support 5GHz WiFi.
• Perform a network reset on the gateway by pressing and holding the WiFi touch key for 5 seconds until the LED flashes rapidly.
• Check the WiFi light status on the display unit: if it's off or flashing slowly, there might be a connection issue with your router.

8.2. Inaccurate Readings

• Verify that the sensor is installed perpendicularly to the liquid surface and away from the water inlet.
• Ensure there are no floating objects, pipelines, or rough surfaces within the sensor's reflection area inside the tank.
• If operating in a humid environment, ensure the ME201R model is suitable for such conditions; condensation can affect accuracy.
• Check if the sensor is under excessive stress from mounting; slightly loosening the screws might improve accuracy.

8.3. No Sensor Data / Sensor Not Reporting

• Check the sensor light status on the display unit. If it's off, the sensor might not be connected or powered.
• Ensure the sensor unit has sufficient battery power.
• Verify that the sensor is within the maximum 300m wireless range of the gateway, with no significant obstacles in between.

8.4. Alarm Not Functioning

• Check the alarm settings (Set Max, Set Min) in the mobile app to ensure they are configured correctly.
• If an audible alarm is desired, ensure the "Beep Alarm" setting in the app is enabled.

9. User Tips

• Fast and Reliable: Users have reported fast connection speeds and accurate measurements. Ensure optimal placement for the best wireless coverage.
• Monitoring Reminders: Leverage the app's alarm features to receive timely notifications for high or low water levels, providing peace of mind.
• Power Cable Consideration: When planning your installation, consider the length of the sensor's power cable to ensure it reaches a power source conveniently.
• Sensor Replacement: In case of sensor damage, it may be possible to replace only the sensor unit, rather than the entire system. Contact support for availability.

10. Warranty and Support

For detailed warranty information, return policies, and comprehensive technical support, please refer to the official user manual PDF or contact the seller directly. The PDF manual can be accessed at: Moray ME201R User Manual (PDF).

If you encounter any issues not covered in this manual or require further assistance, please reach out to the manufacturer's customer service or your point of purchase.