Have no way to calibrate it but it looks correct. Fast, convenient. Backside has a list of "good" and "bad" values to evaluate your result. Would recommend as the educational tool for 6 - 12 yo kids.
Verified purchase: Yes | Condition: New
Can’t go wrong with the price and it’s easy to use. Gives you a good idea of what the quality of your water and others are at.
Verified purchase: Yes | Condition: New
works great, like it was expected to.
Verified purchase: Yes | Condition: New
Very good
Verified purchase: Yes | Condition: New
I have nothing to check its accuracy against but its gotta b rite right?
Verified purchase: Yes | Condition: New
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