Is this a good refractometer?

Joshsmit56001 · #1 12/29/2007, 05:06 PM

http://cgi.ebay.com/Salinity-Refract...QQcmdZViewItem

I am currently using a hydrometer and need something better.

Thanks,
Josh

jeweldamsel · #2 12/29/2007, 05:57 PM

I have a similar one and mine works pretty good.

reefergeorge · #3 12/29/2007, 09:56 PM

Looks just like mine I got off ebay. Make sure to get some calibrating fluid with it, and don't use ro like in the directions say.

Pmolan · #4 12/29/2007, 10:56 PM

This on is difficult to read because you are measuring 1.020 - 1.028. It is a very small area on this scale. You may need to break out the specticles on this one.

reefergeorge · #5 12/29/2007, 11:24 PM

Quote:

Originally posted by Pmolan
This on is difficult to read because you are measuring 1.020 - 1.028. It is a very small area on this scale. You may need to break out the specticles on this one.

Looks a little high you should bring it down to 1.025.

Joshsmit56001 · #6 12/30/2007, 02:46 PM

Better than a hydrometer though

garygb · #7 12/30/2007, 03:37 PM

I suggest you get some Pinpoint Salinity Calibration Fluid to set it. It seems that when using purified water, as lots do, to calibrate, the refractometer is off by a few thousandths (1.022 when I thought my water was 1.025). I bought the fluid through MarineDepot myself. The fluid is at 35ppt. The exact name of the fluid is: Pinpoint Salinity Monitor 53.0mS Calibration Fluid. I learned about it in the Chemistry Forum here on RC. There is a thread somewhere on it.

Slice of Ocean · #8 12/30/2007, 06:13 PM

I bought mine off ebay and it works great.
http://cgi.ebay.com/NEW-Heavy-Duty-A...QQcmdZViewItem

Joshsmit56001 · #9 12/30/2007, 07:43 PM

I will probably use RO water for no until I can buy some of the calibration liquid. Thanks for all the input guys.