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I would highly recommend the Rudolph J57HA Refractometer over any other brand of refractometer that...

The Rudolph Research J457 refractometer monitors sample load quality, an industry first that assists the...

Rugged Refractometer, New from Rudolph Research; The J47 is Temperature correcting, and designed for the...

Refractometers are analytical instruments that measure the refractive index (RI) of liquids...