Tuya Smart Ultrasonic Liquid Level Sensor with Display

1. Technical Specifications

Energy and Communication

• Contact method:
• Between the Gateway and the Router: WiFi 2.4GHz (up to 50 meters with obstacles)
• Between the sensor and the gate: RF433MHz (up to 300 meters without obstacles, 50 meters with obstacles)
• Gate power input: 5V DC @ 1A
• Power interface: Type-C port with a 0.8-meter cable.
• Power supply for the sensor: 110V~240V AC
• Sensor power consumption: Less than 100mA at 5V DC

Sensing accuracy and performance

• Liquid level measurement range: from 0.1 meters to 4 meters
• Measurement accuracy: ± 0.02 meters
• Operating temperature: -20℃ to 70℃
• Protection: Water and dust resistant with IP65 standard

2. Smart and advanced features

Smart communication and response

• RF433MHz technology for data transmission over distances of up to 300 meters
• 2.4GHz WiFi connection for online remote control
• Displaying accurate liquid level data on the gate screen

Advanced alerts

• Device status LED indicator:
• LED on: Pump is working
• LED off: Pump stopped
• Flashes every 15 seconds: The sensor sends data
• Quick flash: WiFi setup
• Slow flashing: WiFi not connected
• Audible alerts when the liquid level changes

3. Setup and Operation

• Connect the power supply to the gateway and the sensor.
• Turn on the device and enter setup mode
• Connect the sensor to the gate via RF433MHz
• Connect the gateway to a WiFi network via the app
• Set the maximum and minimum liquid levels via the app

4. Product Uses

• Monitoring and control of domestic water tanks
• Smart irrigation and farming systems
• Industrial uses
• Monitoring fuel and oil tanks

⚙️ Device settings after connection

• Installation Height: The distance from the sensor to the bottom of the tank.
• Liquid Max Depth: The maximum height that the liquid can reach inside the tank.
• High alert level (Max): To activate the alert when the device is completely full.
• Low alert level (Min): To activate the alert when the liquid level is low.

🔧 Installation tips

• The sensor must be mounted perfectly vertically on the upper surface of the liquid inside the tank.
• Avoid installing the sensor in locations where:
  • Pipes inside the tank (No Pipeline)
  • Internal openings or protrusions (No protruding outlet)
  • No Floating balls
  • Interior panels or covers (No Board)
• The inner wall of the tank must be smooth (No rough inner wall) to ensure accurate reflection of the waves.
• If the mounting surface is curved, it is sufficient to fix it using screws only without strong tension.
• Make sure that the reflection area below the sensor is completely free of any obstructions.
• The ray angle is ±15°, so make sure the height and diameter are consistent as follows:
  • If the height of the tank is 4 meters, the diameter must be greater than 2 meters.
  • If the height is 3 meters, the diameter must be greater than 1.6 meters.
  • If the height is 2 meters, the diameter must be greater than 1.1 meters.