"Rapidox 1100 IF bench mounted helium gas analyser for 0-100% He analysis. With ejector sampling (requires compresssed air supply). Includes programmable alarm and analogue outputs with datalogging software. Front mounted gas fittings, F only; the use of FEP tubing is recommended.Panel mounted version in anodised aluminium 4U X 300mm with front mounted gas fittings only available at extra cost for ejector version."