Nonin 9550 Onyx II Pulse Oximeter Black


Vital Signs Within Reach

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 cost-effective 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.


  • Superior Accuracy: in low perfusion
  • Durable: Designed for the most demanding environments.
  • Simple: Automatic on/off operation
  • Efficient: New turn-off mechanism allows for 2,500 spot-checks or 21 hours of continuous use
  • Versatile: Accommodates widest range of finger sizes from pediatric to adult
  • Enhanced Design: Smaller size with an enclosed spring and easier battery accessOnyx® II 9550