- Clear polycarbonate tubes with a centimeter scale on one side and a Secchi disk design on the bottom
- Secchi design (4.5cm dia.) is screwed onto a stopper that removes for cleaning
- Drain with the drain hose and attached finger crimp
- In two lengths for different turbidity requirements
- Longer length meets requirements of The GLOBE Program
|Determine the degree of visibility when a secchi disk can't be used|
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