Dissolved Oxygen Meter

Humblefish

Dr. Fish
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Any recommendations? Doesn't need to be connected to a controller or anything; a handheld unit is fine. Also doesn't need to be super accurate, as I will be using it to determine if O2 level is sufficient (or needs to be raised) in a QT environment.
 
Me no:oops: let's see if someone else does:)
 

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