United Scientific Secchi Disk

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Good quality and inexpensive Secchi Disk for water clarity measurements. Constructed of robust white plastic disk with permanent screen printed black sectors. Includes attached sin ker and rot-proof polymer line on polymer foam bobbin. Line length is approximately 72 feet (22m) and includes a marking at each foot. Shipping weight: 1.5 lbs.; Dimensions: 8.75" Diameter x 2" Height. Show more