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Need instructions for the MISCO 10430VP analog refractometer? This guide covers sample preparation, reading the 0–30 °Brix scale, zero calibration, cleaning, maintenance, and troubleshooting for this classic handheld instrument.

Restore stability to your digital refractometer with this six-piece replacement rubber feet kit for compatible Hanna Instruments and Milwaukee Instruments models. These black anti-skid bumpers match OEM specifications and help eliminate rocking and wobbling on countertops and laboratory workbenches. Includes alcohol wipes for surface preparation. Guaranteed to Fit. Guaranteed to Last. Only $9.99 per kit from National Industrial Supply, Your Local Refractometer Experts!

Discover why brake fluid absorbs moisture, how water contamination affects boiling point, and when testing can help inform brake fluid maintenance. Learn how the MISCO PA202X-061-062 digital brake fluid refractometer measures DOT 3 water content and estimates boiling point in Fahrenheit.

California AB 2009 establishes requirements affecting digital refractometer testing in licensed plasma collection centers. Learn about plasma total protein screening, the 6.0–9.0 g/dL eligibility range, testing procedures, and the four-scale MISCO Palm Abbe PA203x-108-109-110-111 available from NI Supply.

Road Salt Brine Concentration: A Field Guide to Measuring Salt Brine for DOT Road Deicing

When winter weather arrives, transportation departments and road maintenance crews have a simple objective: keep roads safe while using the minimum amount of deicing material necessary to do the job.

That sounds straightforward. In practice, effective winter road maintenance depends on getting several variables right at the same time: pavement temperature, precipitation, traffic, timing, application rate, chemical selection and, when liquid deicing brine is used, the concentration of the solution being applied.

For sodium chloride road salt brine, concentration is especially important.

A solution that is too weak may not provide the expected freezing-point depression or melting performance. A solution that is too concentrated is not necessarily better. In fact, sodium chloride brine has a well-defined optimum concentration, and exceeding that concentration can actually raise its freezing point and create operational problems.

For road departments, municipal public works crews, airports, private snow-removal contractors and other winter maintenance operations, a portable refractometer provides a fast way to verify that salt brine is being produced and applied at the intended concentration.