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Biometric Signature Identification (BSI) Technology by TOMRA

Biometric Signature Identification (BSI) is a spectral based optical platform, designed to identify the material’s unique fingerprint. This creates new sorting opportunities for nuts, dried fruit, potatoes and other food applications.

All information detected in a specific spectrum of light is analysed by our in-house designed sensor module, compared and classified, all at the speed of light. The system identifies the physical characteristics of good product and defects, and sorts based on these clear patterns.


The flying beam principle (patent pending) allows maximum light efficiency by implementing only two halogen light sources per sensor module, in combination with a rotating polygon. This results in a significant energy minimization and no increased heating effect. Furthermore a scan shield is installed on the sorter, ensuring stable and reliable food sorting results as dust cannot reach the optical inspection window.


  • Increased speed of processing
  • Improved sorting results and efficiency
  • High throughput
  • Increased yield
  • Reduced waste


  • Unique product identification
  • Huge contrast between good and bad
  • Virtual zero false reject
  • Stable and reliable detection
  • Easy to set and operate
  • One program fits all varieties
  • High resolution: detection of smaller defects
  • Modular (Nimbus): in combination with other detection modules on the same platform


“By implementing TOMRA’s Nimbus BSI in our almond processing lines, our company Stewart and Jasper, gained enormously. Our throughput has increased immensely and we have seen our labor expenses drop.
On top of that, our product quality has improved. We have thoroughly researched the sorting industry, and it goes without saying that TOMRA’s Nimbus BSI is unmatched.”

Jim Jasper, Owner Stewart & Jasper, USA