A small volume long path absorption cell of the White-type may be used with condensable samples. The absorption cell is temperature controlled and may be operated over a temperature range of -10 degrees C. to 80 degrees C. To prevent condensation of the sample on the mirror surfaces the mirrors are individually...http://www.google.fr/patents/US4749276?utm_source=gb-gplus-shareBrevet US4749276 - Long path absorption cell
