600kHz ADCP For River Discharge

Q: What is the difference between Broadband and Pulse-Coherent modes?

Broadband is the standard mode for discharge surveys — it provides reliable velocity profiles across the full 0.54–40m range with ±0.25% accuracy. Pulse-Coherent is for specialized near-bed measurements — it offers finer velocity resolution over shorter ranges, useful for boundary-layer studies, sediment transport research, and ecological flow assessment near the riverbed. The instrument can be configured to use either mode depending on your survey objectives.

River-ADCP-600-FA5

The River-ADCP-600-FA5 is a 600kHz 5-beam piston ADCP for river discharge measurement. Four Janus-arranged piston transducers with a 20° beam angle deliver strong, stable bottom-echo returns — even in sediment-laden or turbulent rivers where wider beam angles lose signal. A dedicated fifth vertical piston beam provides independent bathymetry.

Overview

Profiling from 0.5m to 65m, bottom-tracking to 110m — the deepest bottom-lock of any River ADCP in the Oceantek lineup. ±0.25% ± 2mm/s accuracy. Embedded GPS for moving-boat discharge without an external antenna. Broadband and pulse-coherent operation modes. Φ176mm × 194mm POM housing, ≤5W average power, 50m depth rating. Available in Direct-Reading configuration.

Oceantek River-ADCP-600-PA5 transducer side

Key Features

±0.25% ± 2mm/s Accuracy

Survey-grade velocity measurement. 1mm/s resolution, ±20m/s max range, 0–360° direction at ±2°. Same accuracy as the River-ADCP-M9 — piston reliability at the same precision.

5-Beam Piston Array · 20° Beam Angle

4 piston transducers in Janus configuration + 1 dedicated vertical piston beam for bathymetry. 20° beam angle — tighter than phased-array alternatives — concentrates acoustic energy for stronger returns on soft, silty riverbeds.

0.5–65m Profiling · 0.1–5m Cell Size

Configurable from 0.1m up to 5m cells, up to 255 layers. Profile from near-surface to near-bed in medium-depth rivers. 1–2Hz output rate for smooth cross-section data.

110m Bottom-Track Range

The deepest bottom-lock of any River ADCP in the lineup. Tracks reliably from 0.5m to 110m — covers deep river channels, tailraces, and estuarine cross-sections where shallower-tracking instruments lose lock.

Broadband + Pulse-Coherent Modes

Dual operation modes: broadband for standard discharge surveys over the full depth range, pulse-coherent for ultra-fine near-bed velocity measurements when bottom detail is critical.

Integrated Attitude & Environmental Sensors

Built-in temperature (±0.5°C), pressure (±0.25%), attitude (±0.3° roll/pitch), and compass (±1° heading). Full environmental compensation in a single instrument. ≤5W average power.

Specifications

Category	Technical Specification	Parameter
Velocity Measurement	Operation Mode	Broadband / Pulse Coherent
	Profile Range	0.5‑65m (Long‑range Mode) 0.5‑50m (High‑precision Mode)
	Typical Current Measurement Accuracy	±0.25% ±2mm/s
	Velocity Resolution	1mm/s
	Velocity Range	±5.0 m/s (Default); ±20.0 m/s (Max)
	Flow Direction Range	0‑360°
	Flow Direction Accuracy	±2°
	Number of Cells	1‑255
	Cell Size	0.1‑6m
	Max Sampling Rate	4Hz
Bottom Tracking	Velocity Range	±10m/s
	Depth Range	0.5‑110 m
	Frequency	600 kHz
Transducer & Hardware	Configuration	4 piston transducers, Janus arrangement; 1 vertical active piston transducer
	Beam Angle	20°
	Internal Storage	64GB
Communication	Communication Interface	RS‑232 / RS‑422
Standard Sensors	Temperature Sensor	Range:‑5℃‑45℃; Accuracy:±0.1℃
	Pressure Sensor	Range: Subject to depth rating; Accuracy:±0.25%
	Attitude & Heading Sensor	Heading 0‑360°; RMS Accuracy: Roll ±1° \| Pitch ±1° \| Heading 0.8°; Resolution:0.01°
Power Supply	Power Supply Interface	10‑26V
Power Supply	Average Power Consumption	≤5W
Structure	Housing Material	POM
Environment	Operating Temperature	-5℃‑45℃
Environment	Storage Temperature	-40℃‑70℃
Physical Properties	Pressure Depth Rating	50m
	Weight (in Air)	≤3.5kg
	Dimensions	Φ176mm × 194mm

Applications

Why Choose the River-ADCP-600-FA5

Three reasons this instrument earns its place in a hydrological field kit.

Finish the Transect in One Pass

On a silty or sandy riverbed, a wider beam scatters and loses bottom-lock — you have to re-run the cross-section. The FA5’s 20° beam holds the return signal through mud and sediment. You cross once, get your data, move to the next station.

Carry Less Gear to the Riverbank

The GPS is inside the instrument. You don’t bring a separate GNSS antenna, its cable, its mounting bracket, or the power splitter. One instrument, one cable to your laptop — that’s the kit. Lighter bag, faster setup, fewer things to forget in the truck.

One Instrument for Routine Gauging and Research Surveys

Most river ADCPs lock you into one measurement mode. The FA5 switches between broadband for everyday discharge and pulse-coherent for detailed near-bed work — sediment studies, habitat mapping, rating curve refinement. You don’t buy a second instrument when the science team comes to visit.

Frequently Asked Questions

Quick answers about the Ocean-ADCP-600-FA4

Why does the FA5 use piston transducers?

Piston transducers produce a tight 20° beam angle, which concentrates acoustic energy on a smaller seabed footprint. This means stronger bottom-echo returns on soft silty riverbeds, loose sand, and heavily sedimented channels — the conditions where wider-angle beams scatter and lose bottom-lock mid-transect. The trade-off is a larger housing (Φ176mm, ≤2.5 kg) because piston elements need physical depth for the ceramic stack and acoustic matching layers, and the POM housing wall thickness scales with diameter for the 50m pressure rating. For deep rivers with challenging bottom conditions, the 20° beam is worth the extra size.

How does this compare to the River-ADCP-M9?

They serve different river sizes. The M9 (9-beam dual-frequency, 0.06–40m, 0.02m cell size) is the shallow-water specialist — maximum resolution in the smallest streams. The 600-FA5 (5-beam 600kHz piston, 0.54–40m, 0.1m cell size) is the deep-river workhorse — 110m bottom-track and a 20° beam angle that holds lock where the M9 cannot. If your rivers are shallow and you need extreme resolution, choose the M9. If your rivers are deep, turbid, or have challenging bottom conditions, choose the FA5.

What is the difference between Broadband and Pulse-Coherent modes?

Broadband is the standard mode for discharge surveys — it provides reliable velocity profiles across the full 0.54–40m range with ±0.25% accuracy. Pulse-Coherent is for specialized near-bed measurements — it offers finer velocity resolution over shorter ranges, useful for boundary-layer studies, sediment transport research, and ecological flow assessment near the riverbed. The instrument can be configured to use either mode depending on your survey objectives.

Get a Quick quote

Tell us about your project and we’ll provide a customized quotation within 24 hours — including recommended configuration, lead time, and shipping.

Other River ADCP

River-ADCP-M9

9-beam dual-frequency (3.0MHz + 1.0MHz + 0.5MHz) river discharge ADCP. ≤1.5 kg, 0.02m cell size, GNSS-enabled moving-boat surveys. ISO 748 compliant.