Precision flow measurement meets modern software

Professional-grade acoustic Doppler current profilers paired with modern cross-platform software. Faster workflows, cleaner visualizations, and results you can export in open formats.

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Products

Acoustic instruments, from rivers to oceans.

The dual-frequency Voyager DF9 measures shallow to deep water with one instrument. The portable Voyager TK5-2M takes the same workflow to streams, small rivers, and canals. The Lodestar stays on site, measuring velocity for index-velocity stations.

Voyager DF9 acoustic Doppler current profiler — side view with product label Voyager DF9 transducer face showing the 9-beam acoustic array
Voyager Series
Voyager DF9
600 kHz + 2 MHz · 9 Beams

Dual-frequency flagship profiler with 9 acoustic beams. One instrument for shallow-to-deep measurements. No need to carry multiple profilers.

Dual frequency 80 m range 9 beams
9
Acoustic Beams
2
Frequencies (600 kHz + 2 MHz)
80 m
Max. Profiling Distance
0.25%
Velocity Accuracy
100 m
Bottom Track / Depth Range
600 kHz
Center Beam Frequency
Download datasheet ↓ Learn more →
Voyager TK5-2M acoustic Doppler current profiler, side view with product label Voyager TK5-2M transducer face showing its five acoustic beams
Voyager Series
Voyager TK5-2M
2 MHz · 5 Beams

Portable 2 MHz profiler for streams, small rivers, and canals. The instrument weighs 1.0 kg, and an optional compact float fits in a car trunk.

Portable 16 m range 5 beams
5
Acoustic Beams
2 MHz
Operating Frequency
16 m
Max. Profiling Distance
0.25%
Velocity Accuracy
0.2 m
Minimum Measurement Depth
1.0 kg
Weight in Air
Download datasheet ↓ Learn more →
Lodestar-B acoustic Doppler velocity meter, bed-mount model with slanted transducer face, side view with product label Lodestar-B and Lodestar-U acoustic Doppler velocity meters side by side
Lodestar Series
Lodestar
1.7 MHz · Single Beam · Fixed-Site ADVM

Fixed-site acoustic Doppler velocity meter for index-velocity monitoring in rivers and canals. It measures velocity at backwater-affected and tidally influenced sites, and comes in bed-mount, surface-mount, and universal housings.

Fixed-site Bidirectional 3 mount options
1.7 MHz
Operating Frequency
20 m
Max. Acoustic Range
0.5%
Velocity Accuracy
±10 m/s
Maximum Velocity
1.2 kg
Weight in Air
3
Mount Options (Bed / Surface / Universal)
Download datasheet ↓ Learn more →
Our Technology

Acoustic Doppler Current Profiling

1

The Doppler Effect

Sound frequency changes when source and receiver move relative to each other. The frequency shift is directly proportional to velocity, a principle discovered in 1842 and now the foundation of modern flow measurement.

2

How ADCPs Work

HyFlow instruments emit acoustic pulses into the water. Particles like sediment, plankton, and air bubbles reflect echoes back. The instrument measures the Doppler shift in these echoes to calculate water velocity at each depth.

3

Why It Matters

Non-intrusive, no moving parts, simultaneous velocity measurement across the full water column. ADCP technology is the gold standard for streamflow monitoring worldwide.

Applications

Applications across disciplines

From research expeditions to regulatory compliance, HyFlow instruments cover a wide range of flow measurement work. Each datasheet lists the applications for that instrument.

Oceanography

Current profiling, ocean circulation studies, and coastal process monitoring

River Discharge

Stream gauging, flood monitoring, and water resources assessment

Irrigation & Agriculture

Canal flow measurement, water rights compliance, and deficit irrigation management

Regulatory Compliance

Water measurement reporting, SB 88 compliance, and environmental permitting

Renewable Energy

Offshore wind and tidal site characterization with wave and current data

Academic Research

University-grade instrumentation for hydrology and marine science programs

Environmental Monitoring

Long-term ecosystem assessment and environmental impact studies

Vessel-mounted Surveys

Mobile discharge measurements and bathymetric profiling from boats

Software Platform

Modern software for modern instruments

Every Voyager system ships with HyFlow's cross-platform data analysis software, a ground-up redesign of how ADCP data processing should work. Faster workflows, cleaner visualizations, and seamless data export.

Unlike legacy ADCP software that's locked to Windows, HyFlow runs natively on Windows and Linux with a modern interface built for today's research workflows.

Windows
Linux
CSV Export
No License Fees
HyFlow Data Analyzer — deep-water transect with velocity profile and cross-section HyFlow Data Analyzer — shallow-water transect with velocity profile and cross-section
Platform Vision

From sensor to cloud

An integrated platform designed from the ground up for connected water monitoring.

Voyager Hardware

ADCP sensors with proven acoustic Doppler technology

● Shipping
Desktop Software

Cross-platform data analysis for Windows & Linux

● Beta
Edge Computing

Real-time processing at the sensor for automated gauging

○ On Roadmap
Cloud Platform

Data visualization, storage, and automated analytics

○ On Roadmap
About HyFlow

Built in Silicon Valley for the world's water

HyFlow Inc. is a Silicon Valley based technology company that designs integrated acoustic Doppler instrumentation and data analysis software for streamflow and current measurement. We bring Silicon Valley's engineering culture to an industry that's ready for it: rapid innovation, modern software design, and a relentless focus on user experience.

When you work with HyFlow, you're working directly with the engineers who design, build, and support your instruments. No layers of distribution. No ticket queues. Just direct access to the people who care most about your success.

Integrated Systems

Hardware and software designed together, not bolted on as an afterthought.

Modern Software

Cross-platform, cloud-ready architecture built for today's data workflows.

Direct Support

Founder-led engineering support. Talk to the people who designed your instrument.

Open Standards

Results and reports export in standard formats such as CSV, and the software runs on Windows and Linux.

Ready to explore HyFlow instruments?

Whether you're evaluating instruments for a new project or looking for a better alternative to legacy systems, let's talk.

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