- Reaction score
- Salt Lake City, UT
Has anyone here used Hanna Instruments Checkers? I ordered one for Ammonia. With chemical test kits, you don't get an exact number result, you have to compare the color of the test with the card, but that isn't always completley accurate, so with the Hanna Instruments checker, you put the Ammonia test in it, and it reads the color and gives an exact number more accurate than what you'd get if you compared it with the card the test kit comes with.