ZÜRICH, Feb. 29, 2016 — IRsweep GmbH has announced the IRcell, a multipass cell consisting of one circular mirror for robust, compact and temperature-invariant use. The cell body is a mirror that reflects the optical beam. Long path transmission measurements with minimum optical noise of 0.25 percent rms can be achieved. An initial design offers an optical path of 4 m in a sample volume of 30 ml. The optical path length can be adjusted by changing the incidence angle of the optical beam, accommodating short or long optical paths.