Hydrometer?

[ChaosBlizzard]

Is this a good hydrometer:?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3212&item=2394904926

If not, which one do you recommend?



Thanks,
Chaos

 

[OrionGirl]

Most all the hydrometers will work, but are seldom highly accurate. You'll want to get is calibrated with a refractomoter--for example, the hydrometer will read 1.020, but a refractomer says 1.017. Then you know to substract .003 from the hydrometer's reading.

You may want to shop around--if the price on that goes much above $9, you can get them cheaper from an online store, IME.

 

[ChaosBlizzard]

So why not just skip the hydrometer and get the refractomoter? Sounds to me like its just a acurate hydrometer...

Thanks,
Chaos

 

[OrionGirl]

Definitely a better tool, but they are also pricier. Refractometers run around $50 - $100 bucks, but are a good investment, IMO.

 

[ChaosBlizzard]

How about this one:
http://www.misco.com/Digital/salinity.html


Prob cost $300 though, couldnt find a price but I have an idea of it.

Also, would I want it to test for sea salt or Sodium Chloride? I can prob buy one of those digital ones with both the gravity calibrations.

 

[OrionGirl]

I'm not really sure. My best hunch would be sea salt, since it would be more likely to detect and differentiate between the salts and the other trace elements. Maybe someone else has a better understanding?