525DS Oxygen Concentrator Features:

• Exclusive DeVilbiss OSD  (Oxygen Sensing Device) standard on every unit — increases accuracy and reliability for longer service intervals
• Whisper quiet operation
• Readily accessible patient controls and protected cannula fitting
• Two-year dealer service interval
• Recessed humidifier nook prevents damage
• Easy to assemble/disassemble two-piece cabinet for ease of maintenance
• Lockable flow meter — Pediatric flow meter available
• Convenient top and side handles for easy transport
• Accommodates up to a 50-foot cannula (15.3 meters)
• Three Year Warranty
• Aesthetically appealing.
• The new rotary valve is designed for durable, quiet performance. Life testing shows exceptional reliability for 10 million cycles (over 5 years of average use @ 5,000 hrs/yr).
• The pressure compensated flow meter permits use of a long cannula while maintaining an accurate flow setting. The flow meter knob can also be locked for added patient safety.
• Increased flow rates with decreased operating temperatures.
• Longer life with less cup seal wear.
• Redesigned, conformal coated circuit board.
• Robust design, more tolerant of line voltage and noise fluctuations.
• Longer lasting trouble-free life.
• Lighter weight and more compact than most 5 LPM concentrators.
• Easy to move and transport.
• Fixed, recessed humidifier port.
• Very convenient for humidifier bottle users.
• Helps prevent humidifier bottle and connection breakage.
• Pressure compensated flow meter.
• Lifetime warranty on valve.

• Oxygen Sensing Device:
  Exclusive DeVilbiss OSD (Oxygen Sensing Device) standard on every unit, increases accuracy and reliability for longer service intervals.
  
  The OSD is a device within DeVilbiss concentrators that monitors the oxygen produced by the unit. The OSD operates as follows:
  
• Normal Oxygen (green light) - oxygen purity normal
• Low Oxygen (yellow light) - oxygen purity low–requires servicing

• Altitude Restrictions: 0-4921 ft. (0-1500 M) Above 4921 ft. efficiency decreases.
• Power consumption : 300 Watts average at 5-liters per minute. 2.5LPM and below run about 275 Watts
• High/low pressure alarms
• Power failure alarm