Multi-pass cell (MPC) is a classic sample cell for optical absorption spectroscopy. The past designs are often difficult to align, expensive and most have large volume and relatively short pass length. Long Innovation introduces the String-Topology based multipass cell for optical absorption spectroscopy. It occupies less than 300ml of volume and measures only 12.5cm long and 7.5cm wide; yet it could provide over 100meters of absorption path length. We also make the design unique so that it could work up to 300C and down to -194C with accuracy of 0.01C or better.
