Colonies on a Petri plate are counted using an equipment known as a digital colony counter. Microbiologists can quickly and precisely count the amount of bacteria or other microorganisms in a sample with this technology, which is very helpful. Our device counts the number of colonies that are lit by shining a light on the Petri dish's surface. For quick and precise counting of bacterial and mould colonies in petri dishes, use a digital colony counter. It is made to count bacterial and mould colonies quickly and precisely.