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 our limnological secchi disk. Just like the professionals, you’ll leave nothing to chance, because this is real equipment for the real world. Results are meaningless if they’re not repeatable and can’t be compared. Our 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. Or you can use it more prosaically - as a sounding line and weight. You can measure the depth of the water at any given point during your research. |
Save your eyes - this rectangular reading lens is ideal for any lab. Designed for use over extended periods as it is exceptionally easy to hold. Features natural position molded plastic handle and rim. Ship wt: 9 oz. Specifications: • Focus length: 9”. • Lens size: 3-7/8” x 2” • Magnification: 2x |
Just the right instrument to take in the field - totally portable, lightweight and almost indestructible. Its simple design, compact size and durable metal construction make it ideal for any weather conditions. This microscope yields 40x or 100x images illuminated by the built-in prism. Threaded, spring-loaded stage clips are secure and easy to use. No gears means it’s virtually maintenance free. • 10x Huygenian eyepiece with 4x or 10x achromatic objective produces a 40x or 100x image • Light-gathering Lucite prismto focus ambient light • Full-size all glass, coated optics • 25 cm in size • All metal construction • No-gear design • For field work or student use 1812-B10 shown. |
Foldable Magnifier This upright plastic magnfier locks into place and features an inch and centimeter grid for reference. With plastic lens. Three-lens magnfier This tiny magnifier with three plastic lenses is smaller than a pocket knife. Hand-held Magnifier This foldable magnifier with plastic lens has 2x and 4x magnifications. |