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refractometer

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uwscotch

Well-known member
Joined
Jan 16, 2004
Messages
190
So who has one, and if you do, could you bring it to the meeting so i can calibrate my swing-arm hydrometer. There is so much error and I would like to know that when i keep my tank at 1.025, it is not at 1.028. I'm sure other members would appreciate it as well. Otherwise, does any one know a LFS that has one and i can take my hydrometer there and calibrate it.

Thanks

uwscotch
 

mattseattle

Well-known member
Joined
Jul 15, 2003
Messages
2,694
Location
Seattle, WA
or are you just talking about if your hydrometer reads 1.025 that it really is that and if not you can just auto-Calculate that difference?
 

Macbeth417

Reef Monkey
Joined
Oct 18, 2003
Messages
563
Location
Seattle, WA
I believe he means he wants to test for deviation in his hydrometer with and accurate refractometer and that way he can simply subtract the deviation when doing salinity tests at home.

-Erik
 

uwscotch

Well-known member
Joined
Jan 16, 2004
Messages
190
Sorry, i did not clarify my earlier post. As mentioned, i would like to test a sample of water with an accurate refractometer and calculate the deviation from my hydrometer. I can then use that to get a more accurate reading salinity at home. Exactly like Warner mentioned at the last meeting. That would be great if you could bring one, I'm sure other members would be interested in the same thing.

uwscotch
 

uwscotch

Well-known member
Joined
Jan 16, 2004
Messages
190
thought I'd bring this up again. Hopefully we will have a bunch of people bring their hydromters. I have two I am going to bring. They both have different readings.

thanks again
 

mattj206

Well-known member
Joined
Nov 6, 2003
Messages
123
Location
Seattle
mine was .02 off! I realized about a month ago that my salinity had been at 1.26-1.27 most of the time. I'm dialed in now though.
 

jasontatro

Wiseguy
Joined
Sep 1, 2003
Messages
177
Location
West Seattle
I didnt even wait to find out how far off my hydrometer was. I spent the $50 and bought myself a refractometer.

I figure, if I am going to put hundreds of dollars of livestock in my tank it doesn't make sense to use a $6 hydrometer.

Just my $.02
 
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