<title> <META NAME="description" CONTENT="JBS Instruments specializes in stream flow measurement devices like the AquaCalc that are used in the field of hydrology."> <META NAME="keywords" CONTENT="jbs instruments aquacalc aquacount stream flow measurement water discharge current meter hydrology usgs"> </title>

JBS Instruments is now a division of AquaCalc LLC and specializes in the creation of portable stream flow measurement devices like the AquaCalc Pro Plus and the AquaCalc 5000. These instruments are used along with mechanical current meters by hydrographers and biologists to measure the amount of water flowing in streams, rivers and other open channels.

The AquaCalc Pro Plus

With a large display and improved user interface it’s the next generation of automated stream flow measurement computers.

This device is used in wading measurements and suspended measurements using mechanical current meters, USGS mid-section method protocols and approved equipment.

More information ...

The AquaCalc Digital Magnetic Head for the Pygmy Current Meter has been DISCONTINUED as of 2024. A limited number of DPMH Sensor Cables are available.

AquaCalc Pro Plus in Big Stream Wading Full Height
AquaCalc ProPlusinStreamWading

Bridge crane and cableway measurements are much easier.

Faster, more accurate wading measurements.

Measurements can be exported and displayed in your computer for enhanced reporting and quality control.


AquaCalc DataLink

The AquaCalc DataLink program is used to download and display measurements from your AquaCalc. This new version includes the new Section View, and Section Reports, which show you interactive graphs and exportable reports of your measurements. DataLink also allows automated downloading of measurements from the AquaCalc Pro Plus.

 Click here for details and to install AquaCalc DataLink.


The AquaCalc 5000 displays revolutions, elapsed time, velocity, distance and depth for each station in it’s two line display. This legacy instrument has been in production for over 25 years. It calculates total stream discharge at the push of the button.

Which AquaCalc is best? Well, you want an AquaCalc Pro Plus!

AquaCalc 5000

AquaCalc Pro Plus

2 line display

16 line display with scratch resistant lens

Simplified 2 line user interface

Easier to use during measurements with more information on screen and better navigation through menus

2 x 9 volt alkaline batteries / 12 hours

4 x AA NiMh Rechargeable batteries / 8 hours or more

RS232 serial DB9 legacy connector (requires USB to Serial RS232 adapter on laptops)

USB Connection / Recharges batteries

Manual single measurement download

Automated multi-measurement download using DataLink

Comma Separated Value (CSV) human readable output

CSV and automated detailed section reports and graphs using AquaCalc DataLink. Importable into major time-series data analysis platforms, including the USGS.

Basic case, not water resistant

IP65 Direct spray and rain resistant case

Legacy device. Last software update in 1999.

Software updates ongoing

$2500 USD

$2800 USD

AquaCalc LLC - telephone +1.916.372.0534 E-mail: sales@aquacalc.com

AquaCalc Instruments

Need Accessories or Cables?

We have replacement parts and cables for the AquaCalc line of stream flow computers including the Digital Pygmy Magnetic Head retro fit your old Pygmy Current Meter with a new digital magnetic sensor.

Find Accessories and Cables here.

Contact Us