$21.99 Refractometer for Battery, Anti-freeze, and DEF
Check out this $21.99 refractometer on Amazon. Lotta bang for the buck. Received it yesterday. Seems reasonably well-made and appears to work as advertised.
Forum Discussion
Granted it's only Salt, but I use mine a few times a week and have never splashed it anywhere nor dripped on anything in 15 years. The sample is under a flapper 6"+ away from my face with no reason to get any closer and nothing to splash or drip. To each their own.. I'd have no issues whatsoever using this on acid.
