The original Nonin Onyx I Finger Pulse Oximeter is small, neat and automatic. It clearly displays heart rate and blood oxygen saturation levels (SpO2) and is light enough to carry with you anywhere. Many years of experience in pulse oximetry have culminated with the development of this, perhaps the world's smallest, self contained pulse oximeter.

Unparalleled reliability and superior performance in daily use.

Proven accuracy and durability - used by clinicians worldwide

Simple automatic on/off operation

Cost Effective - no additional sensors are needed

Compact - small enough to carry anywhere, any time

Efficient - standard AAA batteries power the unit for 18 hours continuous use (+/- 1600 spot checks)

Maintenance free

Fully automatic operation