Acare?s flowmeters are designed for quick connection and compatibility with standard hospital wall outlets. Each flowmeter incorporates a metal-to-metal seat design for precise flow control. Flow reading is stable and reliable. - Precision engineered pressure compensated design accurately measures flow 0~15 lpm. - The flow output accuracy is fulfilled medical standard within ±10% for avoiding unnecessary oxygen waste and keeping the precise oxygen treatment for the patient. - Calibrated at 50 psi inlet pressure. - Flow control valve 90° or 180° are available.