Dr. Stefan Loibl
Graduate Chemist
Expert for Analytics and Composites

+49 8106 9941 65


Steffen Korzak
Laboratory Services
Fire testing, Photogrammetry

+49 341 392981 66


Oxygen index ( LOI )

Fire test to determine the oxygen index

Testing of the oxygen index according to ISO 4589-2 is conducted by measuring the minimum oxygen content of an oxygen/nitrogen mixture necessary to sustain the combustion of a vertically mounted sample. The resulting oxygen concentration is referred to as (limiting) oxygen index. Measurements of the LOI provide a sensitive measure for the burning behavior of materials under controlled laboratory conditions which makes it particularly useful for quality control.

Society for Materials Testing
Ensuring quality | Accompanying development | Analyzing damage | Passing on knowledge

GWP Gesellschaft für Werkstoffprüfung mbH
Georg-Wimmer-Ring 25
85604 Zorneding/München

Tel. +49 8106 994110
Fax +49 8106 994111

Handelsregister München
HRB 53245
USt.-IdNr. DE131179893

General Manager
Dr. Julius Nickl