Flow Series

Compare the Flow Series.

Choose an autonomous surface vehicle (ASV), also known as an uncrewed surface vessel or USV, for your waterway, instrument and operating workflow.

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Surfbee Flow Seeker autonomous surface vehicle — Flow Seeker

Surfbee Flow Scout autonomous surface vehicle — Flow Scout

Surfbee Flow Finder autonomous surface vehicle — Flow Finder

Surfbee Flow Duet autonomous surface vehicle — Flow Duet

Choose by mission

Start with the work, not the model.

Field conditions and the data workflow are the most useful place to begin. Use these prompts to compare the range, then confirm the final vessel and instrument setup with Surfbee.

Flow measurement

Plan repeatable ADCP transects for rivers, channels and low-flow sites.

Compare flow-measurement platforms

Bathymetry

Match positioning, sensor integration and platform capacity to the survey.

Review survey configurations

Water quality

Plan the vessel, sensor and deployment method for monitoring and profiling work.

Discuss a configured system

Environmental monitoring

Plan a repeatable platform and sensor workflow for ongoing monitoring programs.

Compare monitoring options

Range overview

Four platforms for different field requirements.

Each model uses a transportable inflatable format. The main difference is the fieldwork and instrument workflow it supports.

Surfbee Flow Seeker autonomous surface vehicle

Versatile survey platform

Flow Seeker

A general-purpose platform for ADCP, bathymetry and environmental survey work.

Flow measurement
Bathymetry
Environmental monitoring

Explore Flow Seeker

Surfbee Flow Scout autonomous surface vehicle

Compact low-flow platform

Flow Scout

Compact and precise, with lateral movement designed for low-flow measurement work.

Low-flow measurement
Shallow water
Lateral control

Explore Flow Scout

Surfbee Flow Finder autonomous surface vehicle

Ultra-compact platform

Flow Finder

An ultra-compact platform, purpose-built for SonTek RS5 deployment.

SonTek RS5
Shallow water
Compact deployment

Explore Flow Finder

Surfbee Flow Duet autonomous surface vehicle

Multi-payload platform

Flow Duet

A configurable platform for combined payloads, sensor integration and winch operations.

Multi-payload
Water quality
Advanced bathymetry

Explore Flow Duet

The Flow Series in the field

A closer view of the range, vessel configuration and shore-based operation at Lake Hume.

Lake Hume, Australia

Four Surfbee Flow Series vessels operating together at Lake Hume

A configured Surfbee vessel floating on the water at Lake Hume

An operator controlling a Surfbee vessel from the shoreline

Surfbee Flow Series vessels prepared along the shore at Lake Hume

Compare models

Compare specifications and mission fit.

Compare hull dimensions, minimum operating depth, payload and sensor compatibility for every model.

Flow Series model comparison
Decision point	Flow Seeker	Flow Scout	Flow Finder	Flow Duet
Best for	ADCP, bathymetry and environmental monitoring across varied field conditions.	Shallow, slow-moving channels where lateral positioning matters.	SonTek RS5 missions in shallow water and difficult-access sites.	Missions that require multiple payloads, profiling or specialised integrations.
Hull dimensions (L × W × H)	1.65 × 0.75 × 0.1 m	1.35 × 0.7 × 0.1 m	1.20 × 0.7 × 0.1 m	1.85 × 0.7 × 0.1 m
Transport bag (L × W × H)	90 × 45 × 50 cm	90 × 45 × 50 cm	90 × 45 × 50 cm	90 × 45 × 50 cm
Weight, no batteries	13.5 kg	11 kg	11 kg	15 kg
Minimum operating depth	0.25 m	0.14 m	0.14 m	0.25 m
Maximum payload	up to 10 kg	up to 8 kg	up to 8 kg	up to 12 kg
Top speed	4 m/s (7.8 kn)	2 m/s (3.9 kn)	2 m/s (3.9 kn)	4 m/s (7.8 kn)
Operating temperature	-10 °C to +45 °C	-10 °C to +45 °C	-10 °C to +45 °C	-10 °C to +45 °C
Hull	Inflatable PVC drop-stitch	Inflatable PVC drop-stitch	Inflatable PVC drop-stitch	Inflatable PVC drop-stitch
Thrusters	2 × T600 plus T300 rear centre	3 × T300 including rear centre	3 × T300 including rear centre	2 × T600 plus T300 rear centre
Positioning	Dual GNSS with heading, standard	Dual GNSS with heading, standard	Dual GNSS with heading, standard	Dual GNSS with heading, standard
Dedicated lateral movement	No	Yes	Yes	No
Sensor compatibility	SonTek M9, SonTek RS5, SonTek S5, SonTek PCM, Teledyne RiverPro, YSI EXO sonde, Airmar SS510 EchoRange+, Cerulean Sonar Sounder S500	SonTek M9, SonTek RS5, YSI EXO, and more on request	SonTek RS5	Dual payload. SonTek M9, SonTek RS5, SonTek S5, SonTek PCM, Teledyne RiverPro, YSI EXO sonde, Airmar SS510 EchoRange+, Cerulean Sonar Sounder S500. Documented combinations include M9 with PCM plus EXO, and RS5 plus EXO

About these specifications

Figures describe the standard product. Speed, payload and operating depth vary with the instrument fitted and the conditions on the day.

Coming soon

Integration with Cerulean Sonar Omniscan 450 SS side scan and Cerulean Sonar Surveyor 240-16 MBES multibeam is planned. Model availability will be confirmed at release.

Key differences

Jump to a model, then review each decision point in context.

Best for: ADCP, bathymetry and environmental monitoring across varied field conditions.
Hull dimensions (L × W × H): 1.65 × 0.75 × 0.1 m
Transport bag (L × W × H): 90 × 45 × 50 cm
Weight, no batteries: 13.5 kg
Minimum operating depth: 0.25 m
Maximum payload: up to 10 kg
Top speed: 4 m/s (7.8 kn)
Operating temperature: -10 °C to +45 °C
Hull: Inflatable PVC drop-stitch
Thrusters: 2 × T600 plus T300 rear centre
Positioning: Dual GNSS with heading, standard
Dedicated lateral movement: No
Sensor compatibility: SonTek M9, SonTek RS5, SonTek S5, SonTek PCM, Teledyne RiverPro, YSI EXO sonde, Airmar SS510 EchoRange+, Cerulean Sonar Sounder S500

Figures describe the standard product. Speed, payload and operating depth vary with the instrument fitted and the conditions on the day.

Best for: Shallow, slow-moving channels where lateral positioning matters.
Hull dimensions (L × W × H): 1.35 × 0.7 × 0.1 m
Transport bag (L × W × H): 90 × 45 × 50 cm
Weight, no batteries: 11 kg
Minimum operating depth: 0.14 m
Maximum payload: up to 8 kg
Top speed: 2 m/s (3.9 kn)
Operating temperature: -10 °C to +45 °C
Hull: Inflatable PVC drop-stitch
Thrusters: 3 × T300 including rear centre
Positioning: Dual GNSS with heading, standard
Dedicated lateral movement: Yes
Sensor compatibility: SonTek M9, SonTek RS5, YSI EXO, and more on request

Figures describe the standard product. Speed, payload and operating depth vary with the instrument fitted and the conditions on the day.

Best for: SonTek RS5 missions in shallow water and difficult-access sites.
Hull dimensions (L × W × H): 1.20 × 0.7 × 0.1 m
Transport bag (L × W × H): 90 × 45 × 50 cm
Weight, no batteries: 11 kg
Minimum operating depth: 0.14 m
Maximum payload: up to 8 kg
Top speed: 2 m/s (3.9 kn)
Operating temperature: -10 °C to +45 °C
Hull: Inflatable PVC drop-stitch
Thrusters: 3 × T300 including rear centre
Positioning: Dual GNSS with heading, standard
Dedicated lateral movement: Yes
Sensor compatibility: SonTek RS5

Figures describe the standard product. Speed, payload and operating depth vary with the instrument fitted and the conditions on the day.

Best for: Missions that require multiple payloads, profiling or specialised integrations.
Hull dimensions (L × W × H): 1.85 × 0.7 × 0.1 m
Transport bag (L × W × H): 90 × 45 × 50 cm
Weight, no batteries: 15 kg
Minimum operating depth: 0.25 m
Maximum payload: up to 12 kg
Top speed: 4 m/s (7.8 kn)
Operating temperature: -10 °C to +45 °C
Hull: Inflatable PVC drop-stitch
Thrusters: 2 × T600 plus T300 rear centre
Positioning: Dual GNSS with heading, standard
Dedicated lateral movement: No
Sensor compatibility: Dual payload. SonTek M9, SonTek RS5, SonTek S5, SonTek PCM, Teledyne RiverPro, YSI EXO sonde, Airmar SS510 EchoRange+, Cerulean Sonar Sounder S500. Documented combinations include M9 with PCM plus EXO, and RS5 plus EXO

Figures describe the standard product. Speed, payload and operating depth vary with the instrument fitted and the conditions on the day.

Selection guide

Match the platform to the mission.

01
Environment
Define depth, flow, access and launch conditions.
02
Sensor
Name the exact instrument and data workflow.
03
Payload
Confirm what the platform needs to carry and connect.
04
Capability
Prioritise lateral control, versatility or multi-payload work.
05
Model
Validate the complete configuration with Surfbee.

Beyond the platform

Complete the system around the vessel.

The vessel is one part of the system. Review the instrument, mounts, cables and positioning hardware together.

Hardware ecosystem

Accessories

Review mounts, cables, positioning hardware and field components for your setup.

Mounts
Cables
Positioning
Field components

Explore accessories

A Surfbee vessel being configured with field hardware at Lake Hume — Field configuration

Documentation and support

Need documentation or technical support?

Browse the current product guidance or contact Surfbee for the document that applies to your setup.

Product consultation

Discuss the right configuration with Surfbee.

Share the site conditions, instrument, payload and data workflow so the team can review the most suitable platform and setup.

Talk to Surfbee