Oxygen Detector | Waterproof

TOUGH: Passes 20 ft drop test. Waterproof up to 3 ft. Protection grade = IP67. Rubberized housing for soft-touch" feeling. LIFE: 2-year battery life, 9V lithium battery, and a 3-year sensor life. DETECT: Industrial specs, 0 - 30% with 0.1% resolution. Electrochemical sensors. USA NIST calibration. ALARMS: Loud audio (90 dB), bright ultra-LED bar, and vigorous vibration alarms with adjustable alarm levels. TRUSTWORTHY: ** 1-year limited warranty ** Arrives with calibration and QA certificates ** Product tested and verified in the USA ** 100% quality guaranteed **