An economically priced cell, for one time (or possibly several time) use and for educational/training exercises.
Generally we do not recommended the S50 plastic version for the professional user. The softness of the plastic means it is easily scratched and otherwise damaged. However most laboratories who do use the plastic version see it more as a "throw away" or consumable, which may best suit certain applications.
The Sedgewick Rafter chambers consist of a 2mm thick clear base slide (76 x 40mm) onto which has been built a rectangular chamber. On to the top of this chamber is placed a cover slip.
The chamber is 50mm long x 20mm wide and 1mm deep and its base is marked with a grid of one thousand 1mm squares. When filled with liquid and with a cover glass placed over the chamber 1ml volume of liquid is trapped.