The Oakton WD3566042 DO250 Waterproof Dissolved Oxygen Handheld Meter features an electrode status indicator, which shows the condition of the electrode after each calibration. Get easy-to-read and accurate readings with auto-hold, auto-stable, and real-time measurements with stability indicators. Easily view electrode condition, reading stability, measured parameter, and temperature in one screen. Users do not have to worry about accuracy in fluctuating temperature because ATC ensures measurement accuracy. The simple user interface features adjustable auto shut-off time ranging from 1 to 30 minutes. This self-diagnosing meter displays measurement and meter issues for fast fault finding and troubleshooting.

Easily take measurements and conveniently store meter and electrodes with a built-in foldable stand on the back of the meter. Two grooves on the side of the meter serve as electrode holders, to hold up to 2 electrodes.

The WD-35660-42 features 500 data points (scroll thru).