The Nonin 9550 is no longer available. The Onyx Vantage 9590 Finger Pulse Oximeter has replaced the Nonin 9550.

Nonin, the world leader in fingertip oximetry, has designed years of clinical experience into the Onyx II. The electronics and sensor are incorporated into the world's smallest fingertip oximeter, providing a costeffective solution for spot-checks and short-term monitoring. Onyx II – not just a new look. Superior performance and unparalleled reliability put vital signs within reach anywhere, anytime.

Features and Benefits

• Simple
  • Automatically turns on for fast, easy spot-checks
• Superior
  • Accuracy Trusted by clinicians worldwide
• Efficient
  • New turn-off mechanism allows for 2500 spot-checks or 21 hours of continuous use
• Versatile
  • Accommodates widest range of finger sizes from pediatric to adult
• Enhanced Design
  • Smaller
  • Enclosed spring
  • Wider LED viewing angle
  • Easy battery access
  • Automatic On/Off
• Small & Lightweight
  • Carry the Onyx II anywhere – on a lanyard, in a carrying case or in your pocket. It weighs less than 2 oz.
• Large Bright LED
  • Display SpO2 and Pulse Rate that can be read from any angle, day or night.
• Pulse Quality Indicator
  • Brilliant, easy-to-see LED provides a quick and accurate assessment of patient readings.
• Pediatric to Adult Finger
  • Sizes Accommodates a wide range of finger thicknesses, 0.3 - 1.0 inch (8 mm to 26 mm)

Materials Included

• 9550 Pulse Finger Oximeter
• Lanyard cord.
• Two AAA batteries.
• Protective case.
• User Manual

Technical Specifications

• Dimensions:
  • Width: 3.23”
  • Height: 5.59”
  • Depth: 3.33”
• Oxygen Saturation Display Range: 0-100% SpO2
• Pulse Rate Display Range: 18-321 BPM
• Oxygen Saturation Declared Accuracy Range: 70-100% SpO2 ±2 digits
• Low Perfusion Oxygen Saturation Declared Accuracy Range: 70-100% SpO2 ±2 digits
• Pulse Rate Declared Accuracy Range: 20-250 BPM ±3 digits
• Low Perfusion Pulse Rate Declared Accuracy Range: 40-240 BPM ±3 digits
• Measurement Wavelengths and Output Power:
  • Red: 660 nanometers @ 0.8 mw maximum average
  • Infrared: 910 nanometers @ 1.2 mw maximum average
• Temperature (Operating): +32° to +104°F / 0° to +40°C
  • Temperature (Storage/Transportation): -22° to +122°F / -30° to +50°C
• Humidity (Operating): 10-90% non-condensing
  • Humidity (Storage/Transportation): 10-95% non-condensing
• Altitude (Operating): Up to 40,000 feet / 12,192 meters
  • (Hyperbaric Pressure): Up to 4 atmospheres
• Battery Life (Continuous): Approximately 2,500 spot-checks based on 21 hours of operation using two AAA-size alkaline batteries, calculated at 30 seconds per spot-check
• Battery Life (Storage): 4 years, minimum

Warranty Information

• 2-Year Warranty