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As above counting chambers, but with brightlines. These counting cells have a semi transparent rhodium coating, This reverses polarity and enhances specimen constrast, which is most useful in bright field microscopy when viewing unstained cells.
The Ballast counting cell is 0.5mm deep, it has two chambers each 10mm square. The squares are divided into 20 x 20 alphanumerically indexed, smaller squares. Designed for counting cells in ship's ballast water; brightlined.