The Endosafe®-PTS™ Gram ID is an automated handheld test system that utilizes disposable cartridges pre-filled with the necessary reagents for accurate and convenient Gram testing. The Gram ID utilizes a portable spectrophotometer that provides quantitative test results that can be downloaded to a central PC for tracking and trending. The data is interpreted by the software to indicate whether a sample from an isolated colony contains Gram-negative or Gram-positive bacteria or to confirm a yeast/mold, therefore eliminating technician variability. This definitive, stain-free assay is a single-step test that provides quantitative results in about 3 minutes, allowing you to move on to the next step in your ID faster and eliminate costly disposal of biomedical waste.


  • Results in about 3 minutes
  • Self-contained, disposable cartridges
  • Portable, handheld test system
  • Single-step, quantitative test
  • No disposal of stains and dyes
  • Four samples per cartridge
  • No microbiology training is required – anyone can run this simple assay
  • Accuracy and specificity has been tested with over 70 organisms