Negative Positive
Title: Waterproof? Ha!
Review: The second time we attempted to use the Extech "waterproof" DO Meter we found it totally dead. When we removed the cap, the entire inside of the meter was wet with water an battery acids. Either outside water had entered the meter from somewhere or the fluid around the probe found its way inside the meter. Either way this was not only a useless purchase but it's failure has possible compromised a study. Extech will not be on anybody's shopping list around here any time soon!
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