Introduction
The Moray ME201R is an advanced ultrasonic liquid level monitoring device designed for precise and convenient management of water and oil tanks. It integrates ultrasonic sensor technology with smart home capabilities, allowing for unattended automatic detection and high-precision measurement of liquid levels. Users can remotely monitor tank status, including liquid level, depth, and temperature, through the dedicated Tuya SmartLife mobile application. This system enhances efficiency by providing real-time data, customizable alarms, and optional pump control, helping to prevent issues caused by low or high liquid levels. Its user-friendly design ensures straightforward installation and operation.

Key Features
- Ultrasonic Measurement: Provides accurate, non-contact liquid level and depth readings.
- Temperature Measurement: Monitors the environmental temperature of the tank.
- Water Level Alarm: Configurable alarms for high and low liquid levels.
- Wireless Connectivity: Connects via Wi-Fi for remote monitoring and control.
- Mobile Application Control: Compatible with Tuya SmartLife app for Android and iOS.
- Real-time Data Display: LCD screen on the main unit and app display current liquid level, ratio, depth, temperature, and sensor power.
- Optional Pump Control: Ability to control a pump for supply or drainage based on liquid levels.
- Multi-Tank Monitoring: Supports monitoring of multiple tanks through the mobile application.

Specifications
| Attribute | Value |
|---|---|
| Brand Name | morayelec |
| Model Number | ME201R |
| Product Name | Wireless Level Monitor |
| DIY Supplies | Plumbing |
| Application | Water /Oil Tank |
| Usage | Home Automation System |
| Measuring Range | 0.1m ~ 4.0m |
| Accuracy | ±0.02m |
| Operating Temperatures | -20-70℃ |
| Power Supply | 100-240VAC to DC 5V |
| Operation System | Android, iOS APP |
| APP | Tuya SmartLife |
| Certification | CE |
| Battery Included | No |
| High-concerned chemical | None |
| Origin | Mainland China |
Package Contents
The package includes the following items:
- Main Display Unit
- Ultrasonic Sensor
- Power Adapter (AC/DC 5V)
- Connecting Cable
- Mounting Bracket
- Screws
- User Manual (paper)

Setup Guide
1. Sensor Installation
Proper placement of the ultrasonic sensor is crucial for accurate readings. Follow these guidelines:
- Hold the sensor perpendicular to the liquid surface.
- Install the sensor away from the water inlet to avoid "pseudo-echoes" which can cause inaccurate readings.
- The sensor installation cannot be close to the tank's bulkhead (side wall), as this can also cause strong pseudo-echoes.

2. Power Connection
- Connect the ultrasonic sensor to the main display unit using the provided cable.
- Connect the power adapter to the main display unit.
- Plug the power adapter into a 100-240VAC power outlet. Ensure the main display unit powers on.
3. App Download and Network Setup
- Download the "Tuya Smart APP" or "Smart Life APP" from your mobile device's app store (Android or iOS).
- Network Reset: On the main display unit, press and hold the button for 5 seconds. The LED light will flash rapidly, indicating a network reset. Release the button, and the device will automatically attempt to connect to the network. The Wi-Fi light on the display unit will flash during this process.
- Connect to App:
- Ensure your phone's Wi-Fi and Bluetooth are turned on.
- Open the Tuya Smart or Smart Life app.
- The app should automatically detect nearby devices or allow you to "Add Device" manually. Select "Liquid Level Monitor" or "ME201R Level Sensor".
- Follow the in-app instructions to connect the device to your Wi-Fi network by entering your Wi-Fi credentials.
- Once successfully added, the app will display the device status.


Operation Guide
1. Understanding the Display
The main display unit and the mobile app provide real-time information:
- Liquid Level Ratio: Percentage of the tank filled.
- Liquid Level Depth: Actual depth of the liquid in meters.
- Liquid Level Status: Indicates normal, full alarm, or lower alarm.
- Temperature: Environmental temperature in Celsius.
- Sensor Power: Current power level of the sensor.
- WIFI Light: Indicates Wi-Fi connection status.
- Pump Light: Indicates pump operation status (if connected).
- Sensor Light: Indicates sensor activity.


2. App Settings and Control
Within the Tuya SmartLife app, you can configure various settings:
- Set Max/Min: Define the maximum and minimum liquid level percentages for alarms.
- Installation Height: Calibrate the sensor by setting the total installation height (liquid maximum depth).
- Auto Pump Control: Enable or disable automatic pump operation.
- Pump Mode: Choose between "on-Supply" (fill tank) or "off-Drainage" (empty tank) modes.
- Pump Switch: Manually turn the pump on or off.
- Beep Alarm: Enable or disable audible alarms from the main unit.
- History: View historical liquid level data.

3. Multi-Tank Monitoring
The Tuya SmartLife app allows you to add and monitor multiple ME201R devices, providing a centralized view of all your tanks.

Maintenance
- Sensor Cleaning: Periodically check the ultrasonic sensor for any buildup or debris that might obstruct its operation. Clean gently with a soft cloth if necessary.
- Firmware Updates: Check the Tuya SmartLife app regularly for any available firmware updates for your device to ensure optimal performance and access to new features.
- Power Supply: Ensure a stable power supply (100-240VAC to DC 5V) to the main unit. Avoid using incompatible power adapters.
- Environmental Conditions: Keep the main display unit and sensor within the specified operating temperature range (-20-70℃) to prevent damage.
Troubleshooting
- Device Not Connecting to Wi-Fi:
- Ensure your Wi-Fi network is 2.4GHz (5GHz is not supported by many smart home devices).
- Perform a network reset on the main display unit (press and hold button for 5 seconds).
- Check your Wi-Fi password and signal strength.
- Ensure your phone's Wi-Fi and Bluetooth are enabled during the pairing process.
- Inaccurate Liquid Level Readings:
- Verify the sensor is installed perpendicularly to the liquid surface.
- Ensure the sensor is not too close to the tank's inlet or bulkhead, as this can cause false readings (pseudo-echoes).
- Check for any obstructions directly below the sensor.
- Recalibrate the "Installation Height" setting in the app.
- App Not Displaying Data:
- Check if the main display unit is powered on and connected to Wi-Fi (Wi-Fi light should be solid).
- Ensure your phone has an active internet connection.
- Restart the app or your mobile device.
- If the issue persists, try removing and re-adding the device in the app after a network reset.
- No Alarm Notifications:
- Check your app settings to ensure alarms are enabled and configured correctly (Set Max/Min).
- Verify that notification permissions are granted for the Tuya SmartLife app on your mobile device.
- Ensure the "Beep Alarm" is enabled in the app settings if you expect audible alerts from the main unit.
User Tips
- Quick Connection: Users have noted the fast connection speed and ease of use with the app. Ensure your Wi-Fi is stable for the best experience.
- Accurate Monitoring: The device provides accurate water level measurement and monitoring reminders, which are highly valued by users.
- Oil Tank Compatibility: This monitor is suitable for both water and oil tanks, offering versatility for various applications.
- Power Supply: The ultrasonic sensor operates with a 100-240VAC to DC 5V power supply. Always use the provided adapter or a compatible one.
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided in your product packaging or visit the official Morayelec website. Keep your purchase receipt as proof of purchase for warranty claims.
Frequently Asked Questions (FAQ)
- Q: What is the power supply voltage for the ultrasonic sensor?
- A: The power supply for the ultrasonic sensor is 100-240VAC to DC 5V.
- Q: Can this device monitor oil levels in a tank?
- A: Yes, the Moray ME201R is designed to monitor liquid levels in both water and oil tanks.
- Q: Which mobile application should I use?
- A: You can use either the "Tuya Smart APP" or the "Smart Life APP" available on Android and iOS platforms.