CHOICE CHAMBER WITH LID

CHOICE CHAMBER WITH LID

•  A plastic 'Petri Dish' styled Choice Chamber with 4x sections available for use in the science lab.

(Wikipedia excerpt: "...Petri dishes are usually cylindrical, mostly with Ø ranging from 30 to 200 millimetres (1.2 to 7.9 in),[22][23] and a height to Ø ratio ranging from 1:10 to 1:4.[24] Squarish versions are also available.[25][26].  Petri dishes were traditionally reusable and made of glass; often of heat-resistant borosilicate glass for proper sterilization at 120–160 °C.[22] Since the 1960s, plastic dishes, usually disposable, are also common.[27]

The dishes are often covered with a shallow transparent lid, resembling a slightly wider version of the dish itself. The lids of glass dishes are usually loose-fitting.[22] Plastic dishes may have close-fitting covers that delay the drying of the contents.[28] Alternatively, some glass or plastic versions may have small holes around the rim, or ribs on the underside of the cover, to allow for air flow over the culture and prevent water condensation.[29]

Some Petri dishes, especially plastic ones, usually feature rings and/or slots on their lids and bases so that they are less prone to sliding off one another when stacked or sticking to a smooth surface by suction.[28] Small dishes may have a protruding base that can be secured on a microscope stage for direct examination.[30]  Some versions may have grids printed on the bottom to help in measuring the density of cultures.[31][25][26] ...") Wikipedia Link

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