HONGEN 10L/min Membrane Oxygen Generator HONGEN 10L/min Membrane Oxygen Generator built upon a legacy of reliable,field-proven concentrator models. HONGEN 10 Liter Oxygen Concentrator was updated with enhanced quality, durability, performance and simplicity in mind.This robust oxygen concentrator offers just the right balance of cool and quiet. The designed was specify on slim concept to reduce the space consumption of the user and bring convenience to household, clinic and hostipal usage. Specification: Technical parameters: ambient humidity: 95% RH ambient temperature:-30 ~+40 Technical parameters operating voltage: AC220 + 20V/50Hz rated power: 50 W main engine weight: 3.6 kg working noise: 42dB(A) oxygen concentration: 90 + 3 oxygen flow rate: 10 (N)L/min oxygen production principle:MAS membrane air separation