You guys should learn to use Google (or Yahoo) search.
It's an aquarium hydrometer.
http://www.instantocean.com/sites/instantocean/products/productdetail.aspx?id=1294&cid=957
The web page doesn't indicate what range it measures, or the price.
sly22guy:
How much does it cost? A wine hydrometer is under $10. But if you're prone to breaking hydrometers, it looks like this one is plastic.
Steve
http://www.aquariumguys.com/instantocean.html?gdftrk=gdfV2226_a_7c1209_a_7c5174_a_7c198151
$6.49 "1.000 to 1.032 in .002 increments except in the safe zone there it is in .0001 increments (specific gravity), 0 to 40 PPT in increments of 2 (salinity)."
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