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Protos 3

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Complete automated colony counting and chromogenic identification system

Protos 3 counts colonies in seconds and automatically identifies microbial species by their colour on chromogenic plates. This provides accurate, objective and fully traceable results.

The compact Protos 3 attaches via USB to a computer, where microbiologists can input their plate identification and with the one-click colony counting and chromogenic ID software can rapidly analyse a wide range of plate types. The count results can be automatically transferred to Excel where the count, plate ID and images can be saved. This GLP compliant process, with its full audit trail eliminates transcription errors to provide accurate, objective data, which can be reviewed at any time and used to produce professional reports.

Protos 3 can be used with both small and large plates (up to 150mm) to read a range of format types including spiral, pour, spread and dilution series plates. The system’s camera is so sensitive it can routinely detect colonies as small as 43 microns and the unique LED lighting system and Protos 3 software allows analysis of an infinite number of colonies on one plate in seconds, making this an ideal system for use in busy food and environmental microbiology laboratories.


  • Accurately detects colonies as small as 0.043 mm
  • Precisely counts an infinite number of individual colonies in seconds
  • Analyses 75 plates in 5 minutes

Excellent Detection

  • True colour recognition using unique 3 colour lighting
  • Identifies multiple different colony colours on one plate
  • Analyses all plate colours with a choice of light and dark backgrounds
  • Classifies by size, colour and shape
  • Objectively identifies species by colour on CHROMagar™


Feature Description
Construction Ergonomic housing constructed in high density foam
Integral CCD camera and lens
Light shield 2 sliding doors to prevent excessive ambient light
Camera 1.4m pixel scientific grade CCD camera
USB integral camera with f1.2 lens
Resolution For standard 90mm plates, smallest detectable colony is 43 microns
Imaging 3 channel capture for colour images
Lighting Unique 3 channel (red, green, blue) LED lighting (patent pending)
Multi-array LED lighting (computer controlled)
Lower lighting with upper reflective lighting for all applications
Detection modes Colony counting and Chromogenic ID
Count modes Separation of touching colonies, exclusion areas, colour mode, shape mode, size mode
Software Win7/10 compatible
Database SQL database stores all data and image locations
Dimensions 450mm(h) x 500mm(d) x 400mm(w)

Why to buy

Reproducible results

  • Provides objective colour results
  • Eliminates keying errors with direct results transfer
  • Automatically identifies species on chromogenic plates

Simple to use

  • Intuitive software
  • Corrects for agar defects, touching colonies or sample debris
  • Marks colonies with symbols to show each counted
  • Easy to exclude areas from a count
  • Adjustable counting area

Wide range
of applications

  • Pour plates
  • Spiral plates
  • Gridded plates
  • Streak plates
  • Species identification
  • Large plates (up to 150mm)
  • Dilution series plates