What is a Refractometer?

A Refractometer is a precision optical instrument designed to measure the concentration or mixture ratio of water soluble fluids. It measures refractive index, the speed at which light passes through a liquid. The denser the liquid the slower the light will travel through it, and the higher its reading will be on the refractometer. There are four main refractometer types: Traditional Analog Refractometers, Digital Handheld Refractometers, Inline Process Control Refractometers and Refractive Index Sensors, and Desktop, Benchtop or Laboratory Refractometers.

About MISCO Refractometer

MISCO Refractometer, in business for more than 60 years, is a respected industry leader in the field of refractometry. We maintain this leadership position because refractometers are all we do - just refractometers. Refractometers are not just a catalog item or sideline business for us, they ARE our only business. That's what makes us unique.

Our strategy is simple - we are dedicated to making refractometers useful instruments that are easy for people, not just scientists, to understand and use. We do this by demystifying arcane scientific methods and offering real-world solutions for fluid measurement applications. We pride ourselves on being the information warehouse for the refractometer community.

  • Triethylene Glycol Refractometer for Water Content in Gas Dehydration.

    I am interested in the refractometer. We use triethylene glycol for gas dehydration and I would like to know if this meter will tell us the % water in the glycol. We also use amine Ucarsol 302. The amine mix is 50% Ucarsol and 50% deionized water, will the refractometer check this mix? Thank you,

  • How to Shut Off the Palm Abbe Digital Refractometer.

    How Can You Shut Off the MISCO Palm Abbe Digital Refractometer?

  • Refractometer Reading for Lead-Acid Batteries at Full Charge.

    I have a model 10440 Refractometer. My question is what reading should i get for lead-acid batteries at full charge? I currently am reading from 16 to 26 on two different batteries.

  • Refractive Index vs. Brix Digital Refractometer Accuracy Specification.

    Please explain why your Palm Abbe refractometer lists accuracy as 0.0001 nD AND as 0.1 % Brix when an interval of 0.1 % Brix is almost exactly 0.0002 nD. Am I right in thinking the Brix % should be changed to 0.05 or the nD to 0.0002, which? I use a refractometer to indicate the concentration of firefighting foam solution, by comparison with calibration samples and most other digital hand held refractometers on the market list accuracy as 0.0002 nD or 0.1 % Brix. Some popular firefighting foams have quite low RI, which results in having typical solution RIs of 1.3330 - 1.3338 nD, and if the accuracy claimed is twice as good as your competitors, the error on readings could be halved. Note: FPEs working with foam systems often have to report on RIs as low as 1.3332.

Build Your Own Refractometer

While we pride ourselves in having one of the largest selections of refractometers available, we recognize that every user is different and that there may not be a one-size-fits-all solution to your measurement needs. Build-Your-Own Refractometer allows you to design a custom refractometer to your exact specifications. Just select the desired number of scales, choose protection options, and then add accessories to your design - truly making it your own. When you're done you can choose to print a custom quote or place the order immediately! Give it a try! Of course, call us anytime for personalized service. 866-831-1999


MISCO Wins NEO Success Award

(SOLON, OH – March 26, 2015) We are honored and humbled to be recognized by Inside Business Magazine with the 2015 NEO Success Award for being one of the most successful companies in the region.… [Read More]

Our New Home

(SOLON, OH – July 7, 2014) As we celebrate our 65th Anniversary we are moving to a new home. The new facility is more than twice the size of our previous facility and includes first-class office,… [Read More]

New Beer Refractometer Measures with Unprecedented Precision

ANCIENT TRADITION MEETS CUTTING-EDGE TECH (CLEVELAND, OH – April 7, 2014) An enduring tradition, man’s relationship with beer dates back nearly 7,000 years. And while few human traditions can rival… [Read More]

New Instrument for High-Precision Measurements of Soy Milk Solids and Protein Concentration

(CLEVELAND, OH – April 22, 2013) MISCO introduces their new digital handheld Soy Milk refractometer, engineered specifically for measuring the solids and protein content of Soy Milk. The MISCO Soy… [Read More]

New Modular Smart-Sensors Make Concentration Measurement Simple & Inexpensive

(CLEVELAND, OH – April 15, 2013) Conceptually different than any other inline refractometer available, the patented IRIS™ (Intelligent Refractive Index Sensor) line introduced today by MISCO,… [Read More]

Inline Process Refractometer, Based on New Smart-Sensor, Achieves Five-Fold Increase in Performance

(CLEVELAND, OH – April 8, 2013) The VIP2 inline process refractometer represents one of the latest advancements in smart-sensor technology. Inline refractometers have long been used to measure the… [Read More]

Build Your Own Refractometer

Our Build-Your-Own Refractometer section allows you to design a custom refractometer to your exact specifications. First, select the measurement scales. Next, add options and then accessories to your design. Finally, you can print a custom quote or order immediately. TRY IT NOW!


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Contact MISCO

6275 Cochran Road, Solon OH 44139

Toll Free 866-831-1999

Phone 440-349-1500 

Fax 440-349-1511