GC-O refers to Gas Chromatography coupled with Olfactometry. A human (panelist) is one of the detectors and works in parallel with a GC detector. GC-O combines human perception and scientific response to help professionals link chemical compound to the emotional sense elicited by the said compounds. It allows one to characterize the flavors and fragrances and identify specifc chemical compounds within them. GC-O exhibits powerful capabilities that can be applied to flavors and perfumes, as well as to any odoriferous products (e.g. pollutants) The Sniffer 9100 System is designed to be a dedicated Sniffng-port as a stand alone unit to be connected to any GC available on the market. It is also available as a complete system.



  • At the heart of the Sniffer 9100 GC-O system is the dedicated GC/Olfactometer heated Interface.
  • Brechbühler has over 46 years experience in implementing hyphenated techniques by using special

Working principle

GC-Olfactometry theory is simple. By installing at the end of a chromatographic column a split, the sample is splitted between the FID Detector and the nose. The peak/odor impression correlation will then be performed by specialized fragrance chemists.


  • Interface of 80cm or 140 cm, up to 3 Sniffer 9100 Systems on one GC (optional)
  • Electronic dimensions 350 x 375 x 195mm
  • LAN communication via TCP/IP
  • Temperature control: 50°C to 325°C per step of 1 °C, Maximum recommended temperature 280°C
  • Odor intensity marker
  • Signal output range selectable by software: 0 to 1 Volts; 0 to 5 Volts; 0 to 10 Volts
  • I/O Signals for synchronization:Start in to start the sniffer program;Stop in to stop the sniffer program;
  • Ready out signal available to indicate the sniffer ready status;Inhibit ready in signal available to prevent sniffer from going to ready stats


Food, spices, flavors, petrochemicals, environmental protection, drug analysis, etc.