Contact manual colony counter:a pen gives three sigalsaudible,mark on the plate and addition on the display,anytime that a colony is counted.
A model accepts a stainless steel pen tip.
It counts by touching the agar directly.
It can be used for any media just changing the drak field by a transparent grid.
Major technical parameter
Readoutz:4 digit(0-9999)LED display
Petri-dish size:60-150mm diameter
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