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Don't buy Kool-aid type pouches that rely on you having access to deionized water and lab equipment to mix the solution
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The included bromonaphtalene contact liquid has a refractive index (nD) value of 1
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03% in coffee range
Westover Scientific Ethylene Glycol Antifreeze Refractometer, 32’F to -84’F Range 1.81 bottle Don't buy Kool-aid type pouchesWestover Scientific Ethylene Glycol Antifreeze Refractometer, 32F to 84F Range The Westover Scientific Ethlene glycol antifreeze refractometer, is designed to aid mechanics as they look to maintain automotive antifreeze systems. Calibrate with water to 32F These refractometer come in a zipper nylon, soft case with transfer pipe and calibration screwdriver.
