Moray ME202R Submersible Liquid Level Sensor Instruction Manual

1. Introduction

The Moray ME202R is a submersible liquid level sensor designed for accurate and remote monitoring of water and oil tanks. It features 433MHz wireless communication between the sensor and gateway, and WiFi connectivity for remote access via the Tuya SmartLife app. The system provides real-time liquid level, depth, status, and temperature readings, along with alarm notifications for full or low liquid levels. It is compatible with smart home systems like Alexa and Google Assistant.

Figure 1: Moray ME202R System Overview

2. Safety Information

• Warning: Do not touch the diaphragm of the sensor to prevent damage.
• Ensure all connections are secure before powering on the device.
• Only use the provided power adapter (DC 5V @ 1A) for the gateway.
• Keep the gateway and power supply away from water and extreme temperatures.

3. Package Contents

Please check the package for the following items:

• ME202R Submersible Liquid Level Sensor
• Gateway Unit
• Power Adapter (AC 110V~240V to DC 5V)
• Type-C USB Cable (0.8m)
• User Manual (this document)
• Mounting Screws

Figure 2: Package Contents

4. Specifications

Figure 3: Gateway Dimensions

5. Setup

5.1 App Installation

1. Scan the QR code below to download the "Tuya Smart APP" or "Smart Life APP" on your mobile device. The app is available for both iOS and Android.

Figure 4: App Download QR Codes

5.2 Hardware Connection

1. First, power on the AC/DC adapter.
2. Then, connect the sensor to the gateway.
3. Power on the gateway using the 5V/1A adapter.
4. Place the submersible sensor into the liquid to be measured.

5.3 Network Reset and Pairing

1. Long press the gateway touch button for 5 seconds until the LED light flashes rapidly. Release the button. This indicates the network reset is complete, and the device is ready to connect to the network automatically.
2. Ensure your phone's WiFi and Bluetooth are turned on. Open the Tuya Smart APP and select 'Add Device'. The app will search for nearby devices.
3. Once the 'ME202R Level Sensor' is found, tap to add it.
4. Enter your Home WiFi name and password. Note: The WiFi frequency must be 2.4GHz, not 5GHz.
5. After successful connection, the gateway's indicator light must be steady. If the phone cannot find the device or pairing fails, repeat the network reset process.

6. Operating Instructions

6.1 Gateway Display Indicators

Figure 5: Gateway Display Details

• Battery Level: Displays the current battery percentage of the gateway.
• Sensor Temperature: Shows the liquid temperature (range -20°C to 70°C).
• Water Level Percentage: Indicates the liquid level from 0% to 100%.
• Wireless Sensor Status: LED indicates sensor connection (flashing for data reporting, off for no connection).
• WiFi Status: LED indicates WiFi connection (rapid flashing for config, steady for connected, slow flashing for disconnected).
• Pump Status: LED indicates pump operation (on for pump on, off for pump off).
• Touch Key: Short press to turn off alarm beeping. Long press for 5 seconds to restore factory settings.

6.2 Mobile App Interface

The Tuya SmartLife app provides a comprehensive interface for monitoring and controlling the liquid level sensor:

• Liquid Level Ratio: Displays the current liquid level as a percentage.
• Liquid Level Depth: Shows the actual liquid depth in meters.
• Liquid Level Status: Indicates 'Normal', 'Full alarm', or 'Lower alarm'.
• Temperature: Displays the current liquid temperature.
• Sensor Power: Shows the power status of the sensor.
• History: Provides a log of liquid level changes and alarm events over time.

6.3 Alarm Functionality

The sensor supports both full and low liquid level alarms. These alarms are triggered when the liquid level exceeds predefined thresholds (Set Max for high level, Set Min for low level).

Figure 6: Full Level Alarm Notification

6.4 App Settings

Access the 'Setting' menu in the app to configure the following parameters:

• Installation Height: Set the distance from the sensor to the tank bottom (A).
• Liquid Maximum Depth: Define the maximum height of liquid in the tank (B).
• Set Max: Configure the threshold for the high-level alarm.
• Set Min: Configure the threshold for the low-level alarm.
• Auto Pump Control: Enable/disable automatic pump operation.
• Pump Mode: Set pump operation to 'Supply' (refilling) or 'Drainage'. The default pump working mode is refilling.
• Pump Switch: Manually start or stop the pump.
• Beep Alarm: Turn on/off the device's audible alarm sound.
• Sensor ID: Displays the linked sensor's ID. You can re-link another sensor by entering its ID.

7. Maintenance

• Regularly check the sensor and gateway for any physical damage.
• Keep the sensor's diaphragm clean and free from debris to ensure accurate readings. Avoid touching the diaphragm directly.
• Ensure the gateway is kept in a dry environment and protected from direct sunlight or extreme temperatures.
• Periodically check the power connections for security.

8. Troubleshooting

• Device not found during pairing: Ensure your phone's WiFi is 2.4GHz (not 5GHz) and both the gateway and phone are connected to the same WiFi network. Perform a network reset on the gateway by long-pressing the touch button for 5 seconds until the LED flashes rapidly.
• Inaccurate readings: Check for any obstructions or debris on the sensor's diaphragm. Ensure the sensor is fully submerged and positioned correctly according to the installation height setting.
• No data in app: Verify that the sensor and gateway are properly connected and powered. Check the gateway's LED indicators for sensor and WiFi status.
• Gateway not responding: Try disconnecting and reconnecting the power supply to the gateway. If the issue persists, perform a factory reset (long press touch key for 5 seconds).

9. User Tips

• App Compatibility: The Moray ME202R is designed to work with the Tuya Smart APP or Smart Life APP. It is not compatible with other smart home platforms like Ewelink.
• Optimal Placement: The sensor's position is flexible and not limited to specific tank types, making it suitable for various water tank scenarios, including large outdoor tanks, residential tanks, and underground tanks.

Figure 7: Various Water Tank Scenarios

10. Warranty and Support

For detailed information regarding product usage, specifications, and troubleshooting, please refer to the comprehensive user manual available in PDF format. You can access it here.

Moray Elec is committed to providing high-quality IoT solutions. Our products are backed by:

• 10+ Quality Certificates
• 50+ Technical Patents
• IPD R&D Process
• ISO9001 Quality System

Figure 8: Product Certifications

For further assistance, please contact Moray Elec customer support.