Product Manual (pdf)

Product Introduction

The KH.WQX Pneumatic Bubble Water Level Sensor is a high-precision hydrological water level monitoring instrument designed for continuous measurement in rivers, reservoirs, canals, open channels, and flood-prone environments.

Based on pneumatic bubbler (air-pressure displacement) technology, the system measures water level indirectly by analyzing back pressure in a submerged air tube. This non-contact measurement method ensures stable long-term performance, even in environments with sediment, debris, algae, or fluctuating water conditions.

It is widely used in flood early warning systems, hydrological monitoring networks, irrigation management, hydropower stations, and smart water resource platforms, providing reliable real-time data for decision-making and disaster prevention.

How It Works

The system continuously releases a controlled air flow through a submerged tube.
The water level is calculated based on the air pressure required to maintain bubbling equilibrium.

This indirect measurement principle ensures:

• No direct contact with water
• No sensor corrosion or fouling
• Long-term stable hydrological measurement

Key Features

High Accuracy & Long-Term Stability

Pneumatic pressure-based measurement ensures consistent performance and minimizes drift over long deployments in hydrological environments.

Automatic Zero Calibration

Built-in calibration routines reduce signal drift and maintain long-term measurement accuracy for unattended operation.

Non-Contact Measurement Design

No immersion of sensitive components. Eliminates clogging risks from sediment, algae, or floating debris.

Strong Environmental Adaptability

Suitable for complex field conditions including rivers, reservoirs, flood channels, and stormwater systems.

Multiple Output Interfaces

Supports integration with modern hydrological monitoring systems:

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

Flood-Resistant Protection Design

Built-in surge protection, reverse polarity protection, and lightning resistance for outdoor deployment.

Local Display & Field Configuration

Integrated LCD screen with keypad for real-time status monitoring and on-site configuration.

Automatic Air Tube Cleaning System

Prevents blockage and ensures stable long-term operation in sediment-rich environments.

Data Logging Capability

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

Application Scenarios

River & Hydrological Monitoring

Real-time water level monitoring for rivers, basins, and watershed systems.

Reservoir & Dam Management

Supports safe operation and water level control in reservoirs and hydropower facilities.

Flood Early Warning Systems

Provides critical real-time data for flood prediction and emergency response systems.

Irrigation & Agricultural Water Management

Enables smart irrigation scheduling and efficient water resource utilization.

Pumping Stations & Hydropower Plants

Ensures continuous monitoring for operational safety and system efficiency.

Smart Water Management & IoT Platforms

Fully compatible with IoT hydrological monitoring platforms, SCADA systems, and cloud-based water management dashboards.

Technical Specifications