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Boomer · 05-08-2008, 11:46 AM

This guys is what Bob and JAK are referring to.

Refractometer; New ref.std.

Refractometers and Salinity Measurement by Randy Holmes-Farley - Reefkeeping.com

The biggest issue with some of the Chinese refracts is that right out of the box and calibrated with RO/DI vs a known NSW std, such as PinPoint 53 mS, can be off as much as 0-4 ppt. I might add, there is no such thing as a hand-held refract for seawater, despite any ads you may see anywhere. They are all for a NaCl or table salt solution.

05-08-2008, 11:46 AM	#47 (permalink)
Boomer Reef Sanctuary's Mr. Wizard Join Date: Nov 2003 Location: Duluth, Minnesota Posts: 2,147 View Gallery Karma Komment	Re: Refractometers This guys is what Bob and JAK are referring to. Refractometer; New ref.std. Refractometers and Salinity Measurement by Randy Holmes-Farley - Reefkeeping.com The biggest issue with some of the Chinese refracts is that right out of the box and calibrated with RO/DI vs a known NSW std, such as PinPoint 53 mS, can be off as much as 0-4 ppt. I might add, there is no such thing as a hand-held refract for seawater, despite any ads you may see anywhere. They are all for a NaCl or table salt solution. __________________ Boomer Want to Talk Chemistry ! The Reef Chemistry Forum Want to See More ! The Coral Realm If you See Me Running You Better Catch-Up An explosion can be defined as a loud noise, accompanied by the sudden going away of things, from a place where they use to be.