refractometer

[jdthomas24]

check this one out

http://cgi.ebay.com/Salinity-Meter-...emQQptZLH_DefaultDomain_3?hash=item4cec2dc0ef

 

[Johnny C]

I'm going to go against the grain here and say that all refractometers are most certainly <b>not</b> created equal. While yes, any refracto is better than the junk hydrometers, some are definatly built better than others. I have two that I use on a regular basis. One has been dead on for two years and been through lots of abuse. The other (which was purchased three months ago) needs to be calibrated constantly and will shift readings if you don't handle it with great care. If you hold a $40 + $80 dollar refracto in your hands, I bet you'll feel the difference in weight alone. Just my humble opinion.

 

[Jared J]

wouldn't that be distilled water? That is what mine calls for.

No, distilled water will calibrate your refrac to 0, but it's really best to have a reference solution to check against. Someone had posted the amounts of distilled water and grams of salt to get 35ppm but I can't seem to find it anywhere.

 

[Maivortex]

No, distilled water will calibrate your refrac to 0, but it's really best to have a reference solution to check against. Someone had posted the amounts of distilled water and grams of salt to get 35ppm but I can't seem to find it anywhere.

35 g/L = 35 ppt

 

[Jared J]

35 g/L = 35 ppt

Yeah, that sounds about right but someone had a formula for a small batch. It was like 8oz water and ? grams of salt.........or something like that. made enough of an accurate solution to keep in a small jar.

 

[Maivortex]

Yeah, that sounds about right but someone had a formula for a small batch. It was like 8oz water and ? grams of salt.........or something like that. made enough of an accurate solution to keep in a small jar.

Divide the numbers by 10 for a smaller volume