Product Description Item Number | 1705-0129AirAware Gas Monitor Replacement (O2) Oxygen SensorReplace and repair your Industrial Scientific / Oldham AirAware Oxygen gas monitor with a new replacement (O2) Oxygen Sensor.Need some DIY help changing a sensor or just some friendly technical help with repairing your instrument? Call 1-800-949-7233 and ask for a Gas Detection Specialist.Purchase this replacement Oxygen sensor with confidence. Quick shipping and free technical support. Download AirAware User Manual Reviews 4 Easy to replace-limited lifetime Posted by Any User on Oct 3rd 2018 The sensor is easy to replace and works right away. The lifetime of these sensors is often about year and half. 5 Replacement O2 Sensor Posted by Jeff Edwards on Dec 13th 2017 Replacement sensor works well. Simple to replace in legacy Industrial Scientific units. 5 Dependable Oxygen Sensor Posted by Dan D. on Dec 8th 2017 Item was shipped fast, and product worked as advertised. Nothing more you could ask for. 5 No Issues Posted by David Eisenhauer on Nov 4th 2016 The O2 sensors arrived packaged well and worked as expected.