The Submersible Water Level Sensor is a high-precision hydrostatic pressure transmitter designed for continuous liquid level measurement in water tanks, reservoirs, wells, and industrial monitoring systems.

Featuring a diffused silicon pressure sensing element, the sensor converts liquid pressure into a standard 4–20mA analog output, providing reliable measurements over long cable distances.

Its IP68 waterproof stainless steel construction, 5-meter cable, and 24V DC operating voltage make it suitable for water management, industrial automation, and IoT monitoring applications.

Key Features

• Hydrostatic Level Measurement: Measures liquid depth through water pressure.
• 4–20mA Analog Output: Standard industrial signal compatible with PLCs and monitoring systems.
• 0–5m Measuring Range: Suitable for water tanks, reservoirs, and wells.
• High-Precision Sensor: Diffused silicon pressure sensing technology.
• IP68 Waterproof Protection: Designed for continuous immersion.
• Stainless Steel Housing: Corrosion-resistant construction for compatible liquids.
• 5m Cable: Integrated cable for installation and signal transmission.
• Digital Signal Conditioning: Provides stable and reliable output.
• Anti-Blocking Design: Angled inlet helps reduce blockage.
• 24V DC Supply: Suitable for industrial control systems.

Technical Specifications

Working Principle

The sensor measures hydrostatic pressure generated by the liquid above the sensing element.

As the liquid level increases, the measured pressure increases proportionally. The internal electronics convert this pressure into a 4–20mA signal.

For the 0–5m version:

Values are nominal for a linearly calibrated 0–5m sensor.

Connection and Compatibility

The sensor can be connected to:

• PLC Controllers: Industrial analog input modules supporting 4–20mA.
• Arduino: Through a suitable current-to-voltage conversion circuit.
• ESP32: Through a properly scaled analog interface or external ADC.
• Raspberry Pi: Through an external ADC and current measurement interface.
• Industrial Monitoring Systems: Compatible 4–20mA instrumentation.

Example: Connecting to Arduino or ESP32

Required components:

• 24V DC power supply
• 4–20mA receiver module or suitable precision shunt resistor
• Arduino or ESP32 development board
• Connecting wires

The current signal must be converted into a suitable voltage before connecting it to a microcontroller analog input.

Important: Do not connect the 24V sensor supply or an unconditioned current-loop signal directly to a microcontroller GPIO pin.

Applications

• Water Tank Level Monitoring
• Reservoir Level Measurement
• Well Water Level Detection
• Industrial Liquid Level Monitoring
• Water Treatment Systems
• Irrigation and Agricultural Automation
• Pump Control Systems
• IoT Water Monitoring Projects
• Industrial PLC Automation

Important Notes

• Requires a 24V DC power supply.
• The sensor provides a 4–20mA current output, not a direct digital signal.
• A suitable signal conversion interface is required for Arduino, ESP32, and Raspberry Pi applications.
• The vented cable must remain properly protected and open to atmospheric pressure as required by the sensor design.
• Compatible with water and liquids that do not corrode the sensor materials.
• Confirm the liquid's chemical compatibility before installation.
• The sensor measures liquid level; it does not directly measure water flow.

Package Includes

• 1 × Submersible Water Level Sensor
• 1 × Integrated 5m Cable