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The AquaCalc Pro
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The AquaCalc Pro has been discontinued and replaced by the AquaCalc Pro Plus

JBS is pleased to offer an improved version of the AquaCalc Pro Discharge computer:
the AquaCalc Pro Plus.
All the same features of the the industry standard AquaCalc Pro,


  • A USB connection that allows automated downloading of AquaCalc measurements.
  • Rechargeable and field replaceable NiMh AA batteries that charge using the USB connection.
  • A battery meter that gives the percent of battery charge remaining.
  • An improved user interface that makes navigation and review easier.
  • Automated downloading of measurements using the newly redesigned and improved AquaCalc DataLink 3 program
  • A completely new and redesigned RoHs compliant circuit board with additional program space for more features.
  • An optional Bluetooth module for wireless transfer of measurements to compatible devices.(Available later in the year.)
  • Click here for more information about the AquaCalc Pro Plus

AquaCalc Pro (discontinued)AquaCalcProOnRod

The discontinued AquaCalc Pro features included:

The 25 key keypad puts the most used functions at your finger tips. For those of you who still wish to hear your meter “clicks”, the internal speaker will let you hear them without a headset, and can sound a tone when you press a key or when the AquaCalc displays a message.

The entire user interface has been designed make stream measurements even easier. With the larger display it is now possible to see up to three observations in a vertical on the same screen, plus measurement settings and messages. Plus a continuous display of estimated instantaneous velocity so that you can see what the stream is doing before you begin your “official” observation.AquaCalcProWithComputer

The new menu system, combined with three “soft-keys”, whose functions can be changed as needed, give the user easy access to the AquaCalc’s capabilities.

Hardware design improvements include a case with full gaskets with an international standard IP65 case designed to withstand directed hard spray, scratch resistant display lens, integrated data port, and redesigned  mounting bracket.


AnalyzerGraphSmallerThe Aqua Calc Pro’s measurements can be downloaded to a computer using the included AquaCalc DataLink Pro and displayed in the AquaCalc Pro Analyzer, which displays customizable graphs and reports.


The AquaCalc Pro includes:

      • A 3 year limited warranty
      • AquaCalc DataLink Pro Communications Software with Analyzer
      • Current Meter Cable
      • RS232 Communications Cable
      • Rod Mount
      • Instruction Manual
      • Protective Carry Case

Click here for more Specifications and for a link to download the manual...


The AquaCalc Pro Display

The AquaCalc Pro includes a 16 line, cold weather display.

In the main Measurement Screen, the display will show all of the important information for the vertical that you are measuring, including:

  • Tag line distance,
  • Stream depth,
  • Individual 0.2, 0.6, and 0.8 observations locations
  • Meter revolutions, time and velocity in each observation
  • The calculated velocity for the vertical / tag line location
  • Horizontal Angle  and method coefficients


  • Continuous readout of velocity
  • Suggested placement of next tag line location / vertical
  • Suggested depths for your topset wading rod or suspended measurement reel settings depths when using Automated mode.
  • Ice thickness corrected water depths
  • Wall coefficients
  • Estimated velocity


It counts the clicks and more.

Collecting stream data used to require juggling an armload of gadgets while counting clicks, writing notes, and performing calculations. Not any more.

Now there’s the AquaCalc, a handheld computer that measures, records and calculates data with minimal user input. No more pencil, notepad and current meter table. No more calculator and stopwatch. No more “counting the clicks.”

AquaCalc does it for you - -automatically. You input the depth and distance at each station. AquaCalc measures velocity and elapsed time. Then, AquaCalc calculates total stream discharge and mean velocity. After stream measurement is complete, you can upload the data to a laptop or personal computer. It’s the fastest, easiest, most accurate stream measurement instrument available today.

Faster, more accurate stream measurement.

AquaCalc improves the speed, accuracy and efficiency of your stream measurements. The user inputs the distance and depth. AquaCalc measures revolutions and elapsed time calculating velocity and discharge. When all the stations have been measured, simply press a button and AquaCalc gives you the total discharge and mean velocity. AquaCalc completely eliminates time-consuming hand calculations, saving an average of 20 minutes per cross section. You can save as much as two hours a day - enough time to measure another station.

AquaCalc saves even more time in error detection and re-calculation. With hand calculations, finding and correcting an error can take hours. But with AquaCalc, you can usually find and correct data entry errors in a few minutes.

Eliminates math and transcription errors.

With AquaCalc and accepted measurement procedures, the chance of error is virtually zero. Math errors are eliminated. To help prevent procedural errors, AquaCalc prompts the user with a “flag” when an unusual entry occurs. AquaCalc uploads the data to your laptop or personal computer, so transcription errors are eliminated. The result: highly accurate data with less time wasted finding and correcting errors.

Special features include:

  • Add or delete an observation anywhere in the cross section
  • Up to 3-point measurements in a vertical (0.2, 0.6, 0.8)
  • Ability to perform ice measurements.
  • Display of available memory
  • Warning flags that identify the incorrect meter, sounding weight
  • For more information please see our Frequently Asked Questions page.AnalyzerGraphSmaller02

Saves time in the office.

AquaCalc lets you upload your data to a laptop in the field or your personal computer in the office, eliminating data entry time. And, because there are no math errors, quality control review becomes a much simpler and quicker task.

Convenient in bad weather.

You’ll appreciate the AquaCalc even more in bad weather. No more soggy note paper with hard-to-read notes! AquaCalc is easy to use in all weather conditions.

Durable construction.

AquaCalc is manufactured from high-quality materials to withstand the occasional drops, vibrations, pollutants, temperature extremes and humidity variations that occur with normal, everyday use. its weather -resistant design will stand up to prolonged exposure to sunlight, rain, sleet and snow.

Table or graph output.Analyzer Report02

AquaCalc output looks similar to the USGS Measurement Notes Back Sheet. Microsoft WindowsTM-based programs can convert the data into a format similar to the USGS Measurement Field Notes Front Sheet. The included DataLink Pro software with the Excel-based Analyzer can plot data in graph form, which can help inexperienced users understand the data at a glance.

Additional Features

  • Includes additional procedures requested by the United States Geological Survey that are intended to improve the accuracy of measurements in troublesome conditions. Some of the many improvements include:
    • Add or delete a station anywhere in the cross section
    • Up to 5-point measurements in a vertical (Surface, 0.2, 0.6, 0.8, Bottom)
    • Ability to perform ice measurements.
    • Display of available memory
    • Warning flags that identify the incorrect meter, sounding weight
    • For more information please see our Frequently Asked Questions page.
  • Rod mount: attaches the AquaCalc to a top-set rod to leave your other hand free

Thumbscrews for the AquaCalc ProThumbscrewsCase

In response to a suggestion that one of our thousands of customers made, we have done the obvious: We’ve installed thumbscrews one the battery compartment of the AquaCalc Pro; no more screwdriver! All  AquaCalc’s will now include thumbscrews.

Already own a Pro? If you would like to purchase a set of thumbscrews for your AquaCalc, contact us.


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

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