Not really chemistry related....Need a more accurate refractometer - Which brand???

[DeathWish302]

As the Subject states, my Sybon refractometer is less than desirable at holding an accurate reading. I calibrate it with Randy's homemade calibration fluid to 35ppt and 2-5 days later is is reading 37ppt. This is constant and with less than 1 yr use, I'm thinking of returning it. If the vendor is non-cooperative and since recalibration is time-consuming, I may just buy a new one. The prismn is rinsed and dried after each use and kept in a cool, dry place when storing. It has NEVER been dropped on a hard surface or immersed. What's the deal...did i get what I payed for?

So, what is the general consensus on 'best' ATC refractometer? I spent the $43 on the Sybon and unless another 'cheap' one has a proven track record I would likely not spend that little again.

What's anyone's expereince?
Thanks

DW302

[IslandCrow]

I've had one of the Marine Depot brand refractometers (very reasonably priced) for about 3 years, and I haven't had to recalibrate it since my initial calibration when I bought it. As one of the cheaper refractometers, I'd say it was well worth the price. And it is ATC.

[tatuvaaj]

At least here in Europe most refractometers seem to come from the same factory ;) There seems to be very little difference between them.

There are more expensive (and presumably more accurate) models available, from $100 all the way up to $10000+, like this one: http://www.labdepotinc.com/Product_Details~id~363~pid~12852.aspx :lmao:

Example of available low end laboratory equipment: http://www.labdepotinc.com/Category_Details~id~362.aspx