Extech DO600 K Waterproof ExStik Dissolved Review

Great set, works perfectly. It took a week to track different levels of DO in streams. There weren't any problems and it was really accurate for the work we were doing. Users should understand that it needs to be calibrated every week or at least more often (as indicated in the manual). If you plan to be away from the office or in a remote area for a while, take much of the kit with you so you can recalibrate it several times. Otherwise, your samples are likely to be inaccurate.