As a pool service company we tested this with certified testing solution seems a bit off. No way to calibrate manually but, all in all we can work with this product. Not to far off. Not sure if there is something I am missing following instructions to a T.
Verified purchase: Yes | Condition: New
great easy to use
Verified purchase: Yes | Condition: New
Works great
Verified purchase: Yes | Condition: New
Great thanks
Verified purchase: Yes | Condition: New
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