hydrometer v. refractometer - Page 2

kathywithbirds · 06-29-2007, 09:07 PM

Aren't there ones where you stick the prongs in the water and it reads the SG? Kind of looks like one of those electronic things you test batteries with?

DrHank · 06-29-2007, 09:07 PM

Yes Boomer it's calibrated at 75 degrees and is dead on the money every time I use it. The adjustment for 80 degrees is minimal. Actually I recently saw a comparison of salinity with swing arms using a refractometer as the standard. The results (surprisingly) were that they were very accurate as long as rinsed with fresh water after each use and ensuring that no bubbles were allowed to remain on the swing arm. I wish I could remember where I read it.

BoomerD · 06-29-2007, 09:53 PM

OK, I thought I remembered the hydrometers being calibrated for some rediculously low temp...like 59 degrees or something...

06-29-2007, 09:07 PM	#16 (permalink)
kathywithbirds Social Darwinism victim Join Date: May 2007 Location: The Hood, NJ Posts: 5,847 View Gallery Karma Komment	Re: hydrometer v. refractometer Aren't there ones where you stick the prongs in the water and it reads the SG? Kind of looks like one of those electronic things you test batteries with? __________________ (\_/) (\__/) ( . .) (^.^) (")(") (> <) Bunny and Bunnina have worked things out. Bunny was mistaken after all, Bunnina was not having an affair. "Besides the noble art of getting things done, there is the noble art of leaving things undone. The wisdom of life consists in the elimination of non-essentials." ~Lin Yutang

06-29-2007, 09:07 PM	#17 (permalink)
DrHank Golden Moray Join Date: Apr 2007 Location: Crestview, FL Posts: 2,284 View Gallery Karma Komment	Re: hydrometer v. refractometer Yes Boomer it's calibrated at 75 degrees and is dead on the money every time I use it. The adjustment for 80 degrees is minimal. Actually I recently saw a comparison of salinity with swing arms using a refractometer as the standard. The results (surprisingly) were that they were very accurate as long as rinsed with fresh water after each use and ensuring that no bubbles were allowed to remain on the swing arm. I wish I could remember where I read it. __________________ Doc Dr Hank's 210 Build: http://www.reefsanctuary.com/forums/...nks-tanks.html

06-29-2007, 09:53 PM	#18 (permalink)
BoomerD Reef Shark Join Date: Nov 2003 Location: Northern California Posts: 5,637 View Gallery Karma Komment	Re: hydrometer v. refractometer OK, I thought I remembered the hydrometers being calibrated for some rediculously low temp...like 59 degrees or something... __________________ Intelligence is not knowing all the answers, but knowing where and how to find them! www.google.com

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