The ST901 mild hyperbaric oxygen chamber is part of the Capsule range. Its full-length capsule shape lets the user lie flat for the duration of a session, with a wider body than the ST801 to suit larger frames.

The chamber measures 90 x 225cm.  The 1.3 ATA model comes with a 5 L/min oxygen concentrator, while the 1.5 ATA model comes with a 10 L/min concentrator.