FORENSICS Oxygen Analyzer 0-100% for Scuba & Nitrox

The FORENSICS Oxygen Analyzer 0-100% for Scuba & Nitrox comes from FORENSICS DETECTORS FD, sold through FGSS's Amazon affiliate catalog. Honeywell electrochemical sensor, 3-year sensor life, error under 0.2%. One-button calibration to air in under 3 seconds. Water-resistant ABS case, 3xAAA batteries included, roughly 10 days of continuous use. Verifying your own nitrox fill before a dive is a genuinely important safety habit, not an optional formality -- an analyzer like this only helps if you actually calibrate it fresh to air each time, per the one-button process, rather than trusting a stale calibration from a previous session. Heads up: this listing checks out on Amazon, not through FGSS directly. We're an Amazon Associate, so a qualifying purchase here earns us a small commission -- it doesn't change your price.