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$9.99 0-32% Brix Beer Sugar Wine Wort SG, RSG-100ATCc Homebrew Finds FREE S&H

National Industrial Supply

  • $ 999
  • Save $ 40

Item Description: RSG-100ATCc

Portable Brix & Beer Wort Specific Gravity Refractometer (0-32% Brix & 1.000-1.120 Wort SG)


The refractometer alone weighs over 5 ounces.  A great price on a solid instrument! 


We hope that you love the price, the value and the refractometer!  Please, if you can, leave us a positive, 5-star review on our Google page ( 


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This deal is for USA residents only.  Sorry.  Postal increases have made it hard to ship reliably and inexpensively.


Product Specs:

* 0-32% Brix Scale / 1.000-1.120 Wort Specific Gravity
* Accurate to +/- 0.20% Brix / +/- 0.001 Wort Specific Gravity
* Scale Divisions: 0.20% / 0.001 Wort Specific Gravity
* Automatic Temperature Compensation (ATC) from 10-30'C/50-86'F
* Sturdy design, made of lightweight machined Aluminum, not "carbon" plastic
* Comes in a clear ziploc-style pouch, with a calibration screwdriver, Plastic Transfer Pipette and Users Guide (in english)


BRAND NEW RSG-100ATCc (0-32% Brix / 1.000-1.120 Wort & Must Specific Gravity Scales) Hand Held Refractometer in a clear ziploc-style pouch. This unit is designed specifically for the making of BEER and WINE!  This unit is also great for the testing of Fruits, Vegetables and Grasses, Wine or Beer makers and for the maintenance of CNC Coolants (Soluble Oils, Semi-Synthetics, Neo-Synthetics and Synthetics) and Water Soluble Drawing & Stamping Compounds. 

This unit will help you monitor the sugar levels of your crops, plants, trees, CNC coolants, colostrum in cows and more!



Are you tired of not hitting your desired target gravities? Have you tried to cool a large sample so you could use a hydrometer and see what your gravity is? A refractometer allows you take instant gravities readings at any point during the boil, or run off from the mash. On the fly readings allow you to add more water or boil longer so you can attain exactly the gravity you desire or stop sparging before you extract tannins form the grain. Unlike a hydrometer, a refractometer is a simple solution requiring only a couple drops for a sample.

Refractometers measure degrees brix, which are nearly equivalent to Balling or Plato. A specific gravity scale for unfermented wort is also included.  For reading once fermentation has started software programs like ProMash and Beer Smith are recommended.

Here’s how: A refractometer instantly reads gravity, in Brix, and specific gravity for unfermented wort by measuring the degree that light passing through the sample is bent. Refraction is what makes a pencil look bent when dipped in a glass of water. If you were to stick a pencil in a series of glasses holding increasingly concentrated sugar water, you would see the pencil apparently bends to a greater degree as the sugar content rises. A refractometer works on the same principal.

Easy to use: Apply 2-3 drops to the prism face, close cover and make sure the glass has no dry spots or air bubbles. Wait 30 seconds to allow the sample to come to ambient temperature. Look through the eyepiece while aiming your refractometer at a light source. The meter will show a line between blue and clear. This line will correspond with the brix scale on the side of the viewing screen.

To calibrate: Place one drop of distilled water on the prism face and turn the manual calibration screw to it reads 0 Brix if necessary.

Getting weird Results? Please only use with PRE-FERMENTED WORT!  That's right, plain old beer juice before fermentation.  If you test DURING or AFTER Fermentation, then alcohol will be present and that will skew your readings.  Check out online spreadsheets for ways to use those readings (a shout out to Sean Terrill for his charts and Brad Smith for Beersmith to help us all out with these funky numbers).

International Clients:

You may be subject to a Customs fee in your country.  We are not responsible for any fees that may be incurred.


National Industrial Supply
30777 Rancho California #891420
Temecula, CA 92589, USA
Sales: 951.308.9269  -  Fax: 310.733.5480  -  E-mail:  -  Website:

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