info@hbmeter.cc
+86 152 3780 0315

open channel Flowmeter

Accurate Flow Monitoring for Open Channels & Partially Filled Systems

Built for open-channel applications where conventional inline meters cannot work, these systems combine level-based measurement with channel geometry to deliver reliable flow data. They are widely used in municipal wastewater, stormwater management, irrigation canals, and industrial outfall monitoring.

Technology Selection

Is Open Channel Flowmeter Right for Your Application?

Open channel flowmeters are ideal for permanent discharge monitoring in open channels, flumes, and partially filled waterways. They are strongest when the channel can be defined clearly and flow must be tracked continuously over time.

Open Channel Flowmeter Excels Here

Your flow is gravity-driven and free-surface

Your channel or weir geometry is known and stable

Your flow runs in an open, non-full channel

Your flow is mainly water-based, not complex multiphase media

Your priority is discharge monitoring and totalized flow

Your project needs continuous unattended monitoring

Consider Alternatives Instead

Your process runs pressurized or sealed-line

Your channel bottom or profile changes too often

Your installation point has unstable hydraulic conditions

Your flow shows violent turbulence, foam, or splash

Your hydraulic conditions change too often for stable calculation

Your line operates as a full pipe, not an open channel

Not sure if open channel flowmeter is the right choice?

Share your channel type, flow condition, and site details — we’ll confirm the right open-channel solution or recommend a better-fit alternative.
Get Technology Confirmation

Performance Advantages

What Open Channel Measurement Delivers to Your Site

Open-channel flowmeters are made for gravity-flow monitoring in water and wastewater systems, helping operators monitor discharge continuously, keep data accessible, and improve control across unattended water applications.

Continuous Flow Monitoring

Tracks instantaneous and accumulated flow in real time, giving operators a clear view of ongoing discharge conditions.

Reliable Data Output

Supports standard analog and digital signals for smooth connection to PLC, DCS, and remote monitoring systems.

Defined Channel Matching

Works with standard weirs, flumes, and fixed open-channel sections, making flow calculation practical and repeatable

Low-Maintenance Operation

With simple measuring structures and minimal moving parts, the system supports stable long-term operation with reduced maintenance workload.

Stable Long-Term Logging

Stores historical records for trend review, reporting, and compliance checks, even during unattended field operation.

Flexible Site Matching

Configured for standard weirs, flumes, or channel sections, making it easier to match real installation conditions on site.

Find Your Installation Match

Accurate Flow Measurement Starts with an Accurate Specification

Magnetic Open Channel Flowmeter

Velocity-area measurement directly in the channel — accurate flow rate without constructing weirs or flumes
Channel Width
0.4–20 m
Accuracy
±2.5%
Flow Velocity
0.01–20 m/s
Installation
Bottom mount
  • Suited for sewage treatment, agricultural irrigation, urban drainage control points, and any channel carrying conductive liquid with variable fill level.
View Product Details

Ultrasonic Open Channel Flowmeter

Above-surface level measurement paired with weir or flume algorithms — no probe enters the flow at any point
Level Range
0–30 m
Accuracy
±0.25%–0.5%
Level Resolution
3 mm
Key Feature
Zero-contact
  • Best for sewage treatment plants, surface runoff monitoring, large-scale irrigation canals, and corrosive industrial discharge channels.
View Product Details

Industries & Applications

Deployed Across Open Channel Flow Applications

    Municipal Wastewater Networks

    Measures flow at inlet channels, bypass flumes, and final discharge points across treatment facilities. Supports process control, sludge load estimation, and regulatory effluent reporting.

    Stormwater & Urban Drainage

    Measures peak and average flow in drainage channels, retention basins, and overflow weirs during storm events. Supports flood risk modeling and urban runoff management programs.

    Agricultural & Irrigation Channels

    Monitors water delivery through primary canals and farm-level distribution laterals. Enables volumetric allocation tracking, loss detection, and water usage billing across irrigation districts.

    Industrial Discharge Monitoring

    Quantifies effluent flow at factory drainage channels and cooling water outfalls before discharge to receiving waterways. Supports environmental permit compliance and pollution load verification.

    RRiver, Stream & Watershed Monitoring

    Measures natural watercourse flow at permanent gauging stations and temporary survey points for hydrological data collection, catchment water balance analysis, and low-flow threshold monitoring.

    Flood Control Infrastructure

    Monitors flow in diversion channels, retention basin spillways, and bypass channels during high-water events. Provides operational data for gate management and emergency response coordination.

Installation and Application Cases

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Why Industrial Buyers Choose HBYB Instrument

20+ years focused on industrial flow measurement & monitoring

Successful projects depend on more than product supply. We combine application engineering, disciplined manufacturing, and long-term service support to help industrial buyers reduce selection risk and achieve dependable field performance.
Talk to Engineer
Application-Driven Engineering
We recommend solutions based on process conditions, installation realities, and measurement goals—not generic catalog matching.
Reliable Manufacturing Control
Every meter is built under controlled production and tested for stable performance before shipment to your site.
Flexible Project Support
From model selection to communication output and site conditions, we support configurations that fit real project requirements.
Validated Field Performance
With installations across 62 countries, our open channel solutions have been proven effective in diverse municipal, irrigation, and industrial discharge applications globally.

Get Accurate Flow Measurement

Need help confirming the right open-channel flow solution?

Provide your flume, weir, or channel conditions — Our engineers will assess suitability and recommend the most reliable option for your project.

Still Evaluating Your Monitoring Solution?

Start with the Right Channel Conditions, Not a Product Guess.

Open-channel flow decisions depend on site structure, hydraulic conditions, and monitoring goals. These three paths help you move from uncertainty to the right measurement approach.
Download Selection Guide
A practical guide to choosing the right open-channel flowmeter based on channel type, measuring structure, installation conditions, and monitoring purpose.
Request Selection Help
Submit Your Site Conditions
Share your channel type, water level range, and monitoring goal. Our engineers will recommend the most suitable open-channel measurement solution.
Get Technical Consultation
Speak with Our Engineers
For complex channel, unstable hydraulic conditions, or time-sensitive projects, contact our engineering team directly for faster support.
  • info@hbmeter.cc
  • +86 152 3780 0315