Industry Type


Synbiosis has pioneered the development of automated colony counting and inhibition zone measurement since 1985 to bring you three world leading systems - the ProtoCOL 3, Protos 3 and the åCOLyte 3. Within these ranges you’ll find the perfect colony counter or zone sizing system to fit in with your budget and level of analysis you need.

Rapid colony counts

You can use a ProtoCOL 3, Protos 3 or an åCOLyte for microbial enumeration in safety testing. ProtoCOL 3 can also be used for applications including Ames and stability testing to rapidly provide you with accurate results. These colony counters can analyse a variety of plate types and membranes post membrane filtration.

Exceptional colour definition

With the ProtoCOL 3 and Protos 3 you have unrivalled colour differentiation technology, ensuring you can count different types of bacteria on selective agar quickly and easily. The system’s colour analysis even gives you precise counts of coloured colonies post serum bactericidal assay (SBA) and OPKA (opsonophagocytic killing assay) and can even perform blue/ white colony screening to produce an accurate ratio count of blue and white colonies.

Accurate inhibition zone sizing

If you need to determine microbial inhibition by measuring inhibition zone sizes, then the ProtoCOL 3 system is ideal. ProtoCOL 3 can automatically perform zone sizing of a range of antibiotic susceptibility tests.

Time saving analysis

You can generate life-like images of your plates with the simple to use software in Synbiosis colony counters. You can then automatically distinguish true colonies from clinical debris or membrane grid lines, effortlessly providing you with precise, fully traceable results in seconds.

Click on the following links to download pdfs on the following applications:

Associated products


ChromaZona is an IVD certified instrument for automated microbial ID and antibiotic susceptibility testing in the clinical laboratory.

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ChromaZona for AST analysis2


ProcScan is a scanner that can be used to process large size bioassay plates or colony plates too large for the ProtoCOL 3.

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For processing large size bioaassay plates or colony plates


aCOLade colony counter is a reliable, easy-to-use device for rapid manual counting of colonies on any agar in petri dishes.

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aCOLade colony counter

ProtoCOL 3

ProtoCOL 3 is the next generation instrument for colony counting, zone measurements, (inhibition and AST), membranes and a range of other applications.

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Protocol3 colony counter and zone measurement system

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