Fieldmaster 78-010 Secci Water Measuring Disk

Need to determine how clear the water is? Seeing may not be believing. Measure the turbidity or degree of visibility of the water you’re testing with Fieldmasters limnological secchi disk. Results are meaningless if they’re not repeatable and can’t be compared.

Fieldmaster's sturdy plastic Secchi disk handily meets industry standards. It is 200 mm in diameter (7-7/8”) and has four quadrants, two white and two black. We include 20 meters of 1/8” diameter line on a styrofoam form that will float if dropped in the water. Plus instructions that are written at a basic level.

Most scientists use a Secchi Disk to determine the index of suspended matter in the water. The smaller the index - say, five feet - the more suspended material there is. The water is, obviously, less transparent, with a lower degree of visibility.

You can also use a Secchi Disk to measure the depth of light penetration and can derive a rough estimate of the extent of the littoral zone.

Specifications

Secchi Disk: 200 mm (7-7/8”) diameter plastic disk with four quadrants, two white and two black. Includes an attached stainless steel eye bolt and weight fastened to the underside.

Braided Polyester Line: 20 meters, uncalibrated, with plastic winding float. Less stretch than nylon and more wear than twisted line makes it a perfect choice for students. Stretches less than 5% and remains strong even if it frays