Smart contactless liquid level sensor | 10cm-2.9m | 90-250V | RF433MHz | Tuya | Wi-Fi | IP67

Technical Specifications
Measuring range: 10 cm – 2.9 m (from sensor)
Power supply: 90–250V AC
Output: 9V DC
Communication: Wi-Fi (2.4 GHz) + RF433MHz
Wi-Fi range: up to 50 m (open space)
RF433MHz range: up to 150 m (open space)
Wi-Fi indicator–router distance: ~15 m (open space)
Sensor cable: wireless
Power cable: 1.2 m
Output cable: wireless
LED indication (blue): 20%, 40%, 60%, 80%, 100%
Yellow LED: steady – pump ON/OFF; flashing – alarm + buzzer
Thread: M72×3
Mounting hole: 72 mm
Height: 71 mm
Protection class: IP67
App: Tuya Smart
One app supports: up to 10 sensors
Tank monitoring: simultaneous monitoring of multiple tanks
Functions
Non-contact measurement – no contact with liquid
Wi-Fi control via Tuya app
Automatic pump control (filling / drainage)
High and low level alarm
Audible signal (buzzer)
LED visual indication (level %)
Monitoring of multiple tanks simultaneously
Stable communication via RF + Wi-Fi
Applications

For home users:

Monitoring water tanks at home or in the garden
Rainwater reservoirs
Wells, boilers
Automatic pump control

For engineers / designers:

Integration into automation systems
Smart home solutions
Liquid control in industrial processes
Remote monitoring

For electricians / installers:

Quick installation (M72 thread)
Integration into control systems
Pump automation solutions
Modernization projects

Other applications:

Agricultural tanks
Fuel, chemical, or water reservoirs
Industrial cisterns
Advantages
Non-contact – no wear from liquid
Wi-Fi + Tuya – control via smartphone
Wide measuring range (up to 2.9 m)
Multiple tank control in one app
LED + audible signal
Stable communication (RF433MHz + Wi-Fi)
Easy installation
Disadvantages
Works only with 2.4 GHz Wi-Fi (no 5 GHz support)
Requires precise mounting height adjustment
Not suitable for installation at inlet point
Requires 72 mm mounting hole
Frequently Asked Questions (FAQ)

1. What is the IP protection rating of the sensor?
IP67 – complete dust protection and water resistance (suitable for outdoor and harsh environments).

2. Can the pump be controlled automatically?
Yes, the sensor supports pump operation modes: refilling and drainage with automatic alarm settings.

3. How many sensors can be connected to one app?
One Tuya app can monitor up to 10 sensors simultaneously.

4. What is the maximum operating range?
RF433MHz – up to 150 m in open space, Wi-Fi – up to 50 m (depending on environment).