Moray ME201R Ultrasonic Tank Level Monitor

1. Introduction

The Moray ME201R is an advanced ultrasonic tank level monitor designed for precise measurement of liquid levels and temperature in various tanks. It features wireless connectivity, allowing for remote monitoring and alerts via the Tuya Smartlife mobile application. This device offers reliable distance detection, easy installation, high durability, and low maintenance, making it an excellent solution for home automation and plumbing applications.

Figure 1: Moray ME201R Monitor and Mobile App Interface

2. Package Contents

Please check the package for the following items:

• ME201R Ultrasonic Sensor
• Tank Level Monitor Display Unit
• AC/DC Power Adapter (100-240VAC to DC 5V)
• USB Type-C Cable (0.8m)
• Mounting Screws
• Gasket/Installation Mark
• User Manual (PDF available: Download PDF)

Figure 2: Product Package Contents

3. Specifications

Figure 3: Sensor Dimensions (65mm x 65mm base, 40mm height, hole >55mm)

4. Installation

4.1 Sensor Placement Guidelines

• The sensor should be installed on a smooth, non-rough inner wall.
• Avoid placing the sensor near pipelines or protruding outlets within the tank.
• Ensure no floating objects or boards obstruct the sensor's reflection area.
• The sensor should be installed away from the water inlet to prevent pseudo-echoes.
• Do not install the sensor too close to bulkheads, as this can cause strong pseudo-echoes.

Figure 4: Sensor Placement and Reflection Area

4.2 Physical Installation Steps

1. In the center of the tank, paste the provided 3M installation mark (gasket).
2. Drill a hole with a diameter of at least 55mm in the middle of the tank lid, aligning with the mark.
3. Place the sensor over the drilled hole, ensuring it is centered and the probe is unobstructed.
4. Fasten the sensor securely using the self-tapping screws.

Note: 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.

Figure 5: Sensor Installation Steps

5. Initial Setup and App Connection

5.1 Powering On

1. Connect the AC/DC power adapter to a power source.
2. Connect the USB Type-C cable to the gateway display unit and the power adapter.
3. Power on the sensor unit.

5.2 Network Reset (if needed)

If the device fails to connect or you need to re-link it, perform a network reset:

• Press and hold the touch key on the gateway display unit for 5 seconds.
• The LED light will flash rapidly. Release the button.
• The network will reset, and the device will attempt to connect to the network automatically.

5.3 Connecting to the Tuya Smartlife App

1. Download the "Tuya Smart APP" or "Smart Life APP" on your mobile device (available for Android and iOS).
2. Ensure your phone's WiFi and Bluetooth are turned on.
3. Open the app and select "Add Device". The app will search for nearby devices.
4. Select the "Liquid Level Monitor" (ME201R) from the discovered devices.
5. Connect to your 2.4GHz WiFi network (5GHz networks are not supported).
6. Follow the on-screen prompts to complete the connection.

Note: The WiFi frequency can only be 2.4GHz, not 5GHz. When adding a device, ensure the gateway and your phone are within range of your WiFi router.

Figure 6: System Connection Diagram

6. Operation

6.1 Display Unit Indicators

• Battery Level: Shows the remaining battery power of the sensor.
• WiFi Light: Indicates WiFi connection status. Flashing rapidly during configuration, solid when connected, slowly flashing when disconnected.
• Pump Light: Indicates pump operation (if connected). On when pump is active, off when inactive.
• Sensor Light: Indicates sensor status. Flashing for 15 seconds means sensor is reporting data, off means not reporting.
• Temperature Display: Shows the water tank environmental temperature (-20°C to 70°C).
• Percentage Display: Shows the water tank level percentage (0% to 100%).

Figure 7: Monitor Display Details

6.2 App Settings and Features

Once connected to the app, you can configure various settings and monitor data:

• Installation Height: Set the distance from the sensor to the tank bottom (A).
• Liquid Maximum Depth: Set the maximum height of liquid in the tank (B).
• Set Max: Configure the high-level alarm threshold (actual liquid level value C).
• Set Min: Configure the low-level alarm threshold.
• Sensor ID: Link or re-link sensors to the gateway.
• Beep Alarm: Enable or disable the audible alarm sound from the display unit.
• Pump Control (Optional): The app allows for control of a connected pump, with a default refilling mode.
• Real-time Monitoring: View liquid level ratio, liquid level depth, status (Normal, Full Alarm, Lower Alarm), temperature, and sensor power.
• History Data: Access historical liquid level data.
• Device Sharing: Share tank data with other users.

Figure 8: App Interface with Alarm Displays

7. Maintenance

• Regularly check the sensor for any obstructions or buildup that might affect its accuracy.
• Ensure the power adapter and cables are securely connected and free from damage.
• Keep the display unit clean and dry.
• If the sensor is installed on a curved surface, periodically check the tightness of the screws to ensure proper function and prevent stress on the unit.

8. Troubleshooting

• Device not found during app connection: Ensure your phone's WiFi and Bluetooth are on, and the gateway is powered and in pairing mode (LED flashing rapidly after network reset). Confirm your WiFi network is 2.4GHz.
• Inaccurate readings: Check for any physical obstructions in the sensor's reflection area inside the tank. Ensure the sensor is installed correctly and securely.
• No data reporting: Check the sensor light on the display unit. If it's off, the sensor might not be reporting data or is disconnected. Ensure the sensor is powered and within RF433MHz range of the gateway (max 300m without obstacles).
• Alarm not triggering: Verify that the 'Set Max' and 'Set Min' alarm thresholds are correctly configured in the app. Ensure the 'Beep Alarm' is enabled if you desire audible alerts.
• Gateway LED is off: Check the power connection to the gateway display unit.

9. User Tips

• For optimal performance, ensure the sensor is installed in a location free from internal tank obstructions.
• The fast connection speed and wide coverage of the wireless sensor make it convenient for monitoring various tank types.
• Utilize the mobile app's remote monitoring and reminder features to keep track of water levels and temperature from anywhere.

10. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official Moray Elec website or contact your retailer. Keep your purchase receipt as proof of purchase.

Moray Elec is an IoT solutions company specializing in wireless monitoring of tank levels and pipeline pressure, with over 13 years of experience and a focus on low-power wireless transmission and sensors. They serve customers in over 100 countries.