KKmoon Oxygen Meter Portable Oxygen(O2) Concentration Detector with LCD Display and Sound-light Alarm ALARMSound, light and vibration alarm. Low concentration 19.5%VOL yellow warning light flashing. High concentration 23.5%VOL red warning lights flashing (alarm concentration can also be set up). KXL-803Under voltage, low voltage automatic shutdown. Menu operation interface, battery power real time display. PRECISION MEASUREMENTThis LCD digital Oxygen detector is a natural diffusion method for detecting Oxygen concentration, using high performance electrochemical sensor, with excellent sensitivity and excellent repeatability.The instrument adopts embedded micro control technology, simple operation, complete functions, high reliability. MEASUREMENT RANGEWide Oxygen Measuring Range: 0-25%VOL; Measurement error: 2%; Resolution: 0.1%. Environment Temperature Meaurement Range: -15C ~ 50C. Appearance of light and novel, easy to carry, easy to operate. APPLICATIONOxygen tester is suitable for explosion-proof, are widely used in metallurgy, power plant, chemical, mine, tunnel, underground pipelines or underground mines and other places, effective prevention of hypoxia and oxygen poisoning, can effectively ensure the safety of the staff's life is not infringed.