Herculometer® - Triple Scale Hydrometer
At last, a hydrometer that can stand up to the toughest of brew days (and brewers).
Forged from rugged polycarbonate plastic, the Herculometer® is virtually unshatterable.
Don't miss a gravity reading due to a broken hydrometer ever again.
Features a triple scale format for beer and wine. Range: 0.982 to 1.160 S.G.
This broke from a pretty short fall after a few months. It's pretty cheap so it's worth it just to order another if you break it.
Have been using it in my first batch of hard cider. Works great.
Tested against two other glass hydrometers and readings matched. I don't think there is such a thing as "unbreakable" but if you come close, this is it.