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  2. Refractometer - Wikipedia

    en.wikipedia.org/wiki/Refractometer

    Gemstone refractometers are available both as classic optical instruments and as electronic measurement devices with a digital display. [3] In marine aquarium keeping, a refractometer is used to measure the salinity and specific gravity of the water. In the automobile industry, a refractometer is used to measure the coolant concentration.

  3. Refractometry - Wikipedia

    en.wikipedia.org/wiki/Refractometry

    Refractometers are frequently used by grape growers and kiwifruit growers for Brix testing of sucrose levels in their fruit. Refractometry is also used in the gelatin industry. To convert the RI of a gelatin sol (reported in Brix) to a gelatin concentration, one need only multiply by eight-tenths (0.8). A sol with a 10.0 RI would therefore be 8 ...

  4. Abbe refractometer - Wikipedia

    en.wikipedia.org/wiki/Abbe_refractometer

    They did, however, have the ability to electronically compensate for the temperature differences of many fluids where there is a known concentration-to-refractive-index conversion. Most digital laboratory refractometers, while much more accurate and versatile than their analog Abbe counterparts, are incapable of readings on solid samples.

  5. Digital handheld refractometer - Wikipedia

    en.wikipedia.org/wiki/Digital_handheld_refractometer

    A digital handheld refractometer is an instrument for measuring the refractive index of materials. ... Brix, freezing point, boiling point, concentration, ...

  6. Brix - Wikipedia

    en.wikipedia.org/wiki/Brix

    The °Bx is also used for measuring the concentration of a cutting fluid mixed in water for metalworking processes. Dissolved solids can also be measured in °Bx with a refractometer, but it must be calibrated for the particular dissolved substance, because refractivity does not correspond exactly to specific gravity.

  7. Here are 5 things that will get likely more expensive in 2025 ...

    www.aol.com/finance/5-things-likely-more...

    President-elect Donald Trump is set to take office on Jan. 20. Once he takes the reins, a number of economic changes could ensue. Trump has proposed slapping tariffs on goods the U.S. imports from ...