Graticules, Stage Micrometers, and Calibration Standards
Stage Graticules (continued) C. Vibration
FOE PPL Dot – S25 The pair of dots, which appear to merge into a single dot, determines the amount of vibration of the slide in the appropriate axis. The pattern on the S25 is an array of 20 pairs of dots converging on a single dot. The distance between each dot pair increases by 0.001 inch to a maximum of 0.02 inch, pairs being equispaced 0.25 inch.
Pattern S25
Catalog # 68038-25
Description FOE PPL Dot Vibration Test D. Volume/Counting Cells
These are used to create precise volumes of liquid to enable counting of particles in a specified volume of liquid. A thick slide (glass or plastic) has an area cut into its surface that will hold precise volumes of bathing fluid. The shallow well, facilitating easy counting of contained particles. In use, a single drop of liquid is placed on the slide and a coverglass is placed on the platform providing equal and accurate subdivisions of the fluid each of which can be observed for particle counting.
Sedgewick Rafter and Cover Glass — S50, S51, S52
For use in water analysis, culture inspection, and any fluid where particles per unit volume need to be determined. Available in two versions: S50 is an economically priced plastic cell.
S52 is made from glass, with a chromium surface image. This is intended for professional use and when using phase contrast. In each type, a central cell is filled with fluid and a coverglass limits the volume to 1 milliliter. The grid subdivides this into micro-liters.
S51 is the spare cover glass for S50 and S52. Each cell is supplied with one cover glass.
Pattern S50 S52 S51
Howard
The Howard cell is a glass slide 76mm x 35mm with a central circular island and is used for counting mold fibers and spores in fruit juices, especially from tomatoes. With the K20 coverglass in place a 0.1mm thickness of liquid is contained over the central island. The coverglass has 25 calibrated fields of 1.382mm diameter through which to view the particles. This coverglass removes the necessity of precise adjustment of the microscope and eyepiece graticule in the original Howard method.
Pattern S60 K20
Catalog # 68051-60 68051-20
Description
Howard Cell for Fruit Juices K20 Calibrated Cover Glass
Qty
each each
Fax (215) 412-8450 or 8452 • email :
info@emsdiasum.com or
stacie@ems-secure.com •
www.emsdiasum.com Electron Microscopy Sciences In PA: (215) 412-8400 • Toll-Free (800) 523-5874 43
Catalog # 68050-50 68050-52 68050-51
Description
S50, Sedgewick Rafter, Plastic S52, Sedgewick Rafter, Glass S51, Cover Glass for S50 & S52
Qty
each each each
Qty each
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