The medical oxygen flowmeter features a 0-15 LPM normal flow range and has a 1/8″ NPTF connection. The flowmeter is reliable, durable, and has a chromed stainless steel flow indicator ball which provides a more accurate reading when compared to a plastic float. The unit's needle valves are also extremely accurate and provide a precise flow-setting every time. The flowmeter's polycarbonate flow tubesaretransparent,durable , the needle valve made of stainless steel,safe for adjustment. - Flow Range: 0-15 LPM - DISS 1240 :9/16-18UNF - Calibrated at 50 PSI - Accuracy: ± .25 LPM from .5-5 LPM, ± .5 lpm above 6-15 LPM - Increments: .5 LPM from .5-5 LPM, 1 LPM from 5-15 LPM -Inlet adapters: BS/DIN/AFNOR/OHMEDA/DISS/CHEMETRON.,etc -New design reusable humidifier :250ML