Stage Graticules

Volume/Counting  & Finder Graticules

VOLUME/COUNTING CELLS

These are used to create precise volumes of liquid to enable counting of particles in a specified volume of fluid. A thick slide (glass or plastic) has an area cut into its surface that will hold precise volumes of bathing fluid. The depth is very shallow, facilitating easy counting of contained particles. In use a single drop of liquid is placed on the slide and a cover glass is placed on the platform providing equal and accurate subdivisions of the fluid each of which can be observed for particle counting. For use in water analysis, culture inspection and any fluid where particles per unit volume need to be determined.

Sedgewick Rafter Cell and Coverglass
S50, S52, S51

The Sedgewick Rafter Cell is available in two models:

S50 - An economically priced plastic cell.

S52 - Made of glass, with chromium surface image. This cell is intended for continued professional use and when using phase contrast.

S51 - Cover Glass for S50 & S52

In each type, a central cell is filled with fluid and a cover glass limits the volume to 1 milliliter. The grid subdivides this into microliters.

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Howard Cell and Cover glass - S60, K20

The Howard cell is a glass slide 76 x 35mm with a central circular island and is used for counting mould fibers and spores. With the K20 cover glass in place a 0.1mm thickness of liquid is contained over the central island.
 

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FINDER GRATICULES

Finder graticules are used to swiftly and accurately give a position of reference to an area of interest on a specimen.

The England Finder -S7

The England Finder is a glass slide marked over the top surface in a way that a referenced position can be directly read relative to the locating edge.

All England Finders produced by Graticules for over 40 years are identical. The purpose of the finder is to give the microscopist an easy method of recording the position of a particular field of interest and so that the same position can be re-located at a later date, or by another person in another laboratory, or when using any other England Finder on any other microscope.

The location of the arrows is identical for all England Finder slides. Mark a label on the left hand side of the specimen slide, indicating the orientation to be repeated. By replacing the specimen slide with the England Finder, taking care not to disturb the position, the feature of interest can be noted. The feature can be also be re-located at another place or time by reversing the procedure. A total of 100 positions on a 76 x 26mm slide can be accurately located.

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Lines and Cross Lines  |  Square Grids & Indexed Grids  | Horizontal and Vertical Scales

| Concentric Circles |  Particle Sizing  |  Metallurgy |  Stereology  | Stage Micrometers

Stage Calibration Standards | Stage Volume counting