Combines efficient operation with optimal safety, and revolutionary styling complements the most modern operatory aesthetics. Adjustments in the units total flow are achieved with a single control, while the ratio (%) of gases being delivered to the patient remains constant. A built-in safety feature prevents the oxygen concentration from dropping below 30%. And an oxygen fail-safe system discontinues the flow of nitrous oxide if the oxygen supply is interrupted.The new 4-Cylinder Portable Manifold is the only system that offers the convenience of flowmeter-only height adjustment. With a vertical positioning range of 10", the flowmeter can be set to the operators preferred viewing level during the procedure and later adjusted downward for easy storage under open counter space.