Product Manual (pdf)

Product Introduction

The KH.WQX Pneumatic Bubbler Water Level Sensor is a high-accuracy hydrological monitoring device designed for continuous water level measurement in rivers, reservoirs, canals, open channels, and flood monitoring applications.

Based on pneumatic bubbler (air-pressure displacement) technology, the sensor measures water level indirectly by detecting the back pressure generated through a submerged air tube.

This non-contact measurement principle ensures reliable long-term operation in challenging environments with sediment, floating debris, algae, and changing water conditions.

The KH.WQX is widely used in:

• River water level monitoring
• Reservoir and dam safety monitoring
• Flood early warning systems
• Irrigation and water resource management
• Hydropower station monitoring
• Smart water management and IoT hydrological platforms

The system provides stable real-time water level data to support disaster prevention, infrastructure safety, and intelligent water resource management.

How It Works

The KH.WQX uses pneumatic bubbler technology to measure water level through air pressure displacement.

The system continuously supplies controlled air through a submerged tube. As the water level changes, the required air pressure changes accordingly. The sensor analyzes these pressure variations and calculates the corresponding water depth.

This indirect measurement method provides several advantages:

• No direct contact between electronic components and water
• Reduced corrosion and fouling risks
• Stable measurement in sediment-rich environments
• Suitable for long-term unattended hydrological monitoring

Key Features

High-Accuracy Water Level Measurement

Pneumatic pressure-based measurement technology provides stable and reliable water level data with minimal drift during long-term field deployment.

Automatic Zero Calibration

Built-in calibration functions reduce measurement deviation and maintain long-term accuracy for unattended hydrological monitoring stations.

Non-Contact Water Level Monitoring

Sensitive electronic components remain isolated from water, reducing risks caused by corrosion, sediment, algae, and floating debris.

Strong Environmental Adaptability

Designed for harsh outdoor environments, the KH.WQX is suitable for rivers, reservoirs, flood channels, stormwater systems, and remote monitoring locations.

Flexible Communication Interfaces

The sensor supports integration with various hydrological monitoring and IoT systems through:

• RS485 Modbus RTU
• SDI-12
• 4–20mA analog output (optional)
• IoT telemetry and 4G wireless transmission

Flood-Resistant Protection Design

Built-in surge protection, reverse polarity protection, and lightning resistance ensure reliable outdoor operation under complex environmental conditions.

Local Display and Field Configuration

The integrated LCD display and keypad allow real-time status monitoring, parameter configuration, and convenient field maintenance.

Automatic Air Tube Cleaning System

The built-in air tube cleaning function helps prevent blockage and maintains stable operation in sediment-rich water environments.

Data Logging Capability

Internal memory supports up to 10,000 records for historical data analysis, hydrological reporting, and system management.

Application Scenarios

River Water Level Monitoring

Provides continuous water level observation for rivers, watersheds, and hydrological monitoring networks.

Reservoir and Dam Safety Monitoring

Supports reservoir operation management, water storage monitoring, and dam safety applications.

Flood Early Warning Systems

Provides real-time water level data for flood forecasting, emergency response, and disaster prevention.

Irrigation and Agricultural Water Management

Supports smart irrigation scheduling and efficient agricultural water resource utilization.

Hydropower Stations and Pumping Facilities

Enables reliable water level monitoring for hydropower plants, pumping stations, and water infrastructure.

Smart Water Management and IoT Platforms

Compatible with IoT platforms, SCADA systems, telemetry stations, and cloud-based water management platforms for centralized monitoring.

Technical Specifications