?The portable oxygen detector is a kind of ?essential safety instrument which can continuously detect the oxygen concentration in the working environment.It is suitable for explosion-proof£¬ toxic gas leakage£¬ underground pipelines or underground mines and other ?places£¬ can ?effectively ensure the safety of the staff's life is not ?infringed£¬ the production equipment is not lost. ?? <br>This instrument is a natural diffusion method for detecting gas 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. ?? <br>This O2 detector is applicable to the concentration of oxygen in the ambient air detection£¬ are widely used in metallurgy£¬ power plant£¬ chemical£¬ mine£¬ tunnel£¬ underground pipelines and other places£¬ effective prevention of hypoxia and oxygen poisoning. <br><br><strong>Features:</strong> <br>Appearance of light and novel£¬ easy to carry£¬ easy to operate. ?? <br>Menu operation interface£¬ battery power real time display. <br>Under voltage£¬ low voltage automatic shutdown. <br>Rapid response and reliable accuracy. <br>Sound£¬ light and vibration alarm. <br><br><strong>Specification:</strong> <br>Sensor: Electrochemical Principle <br>Test Gases: Oxygen Concentration (O2) <br>Temperature Measurement: Ambient Temperature?? ? <br>Display Unit: O2: %VOL <br>? ? ? ? ?Temperature: ¡ú/? ?? ??? ? <br>Measurement Range: O2: 0 ¡Î 25%VOL <br>? ? ? ? ? ? ?Temperature: -15¡Î50¡ú / 5¡Î122? ?? ? <br>Resolution: O2: 0.1%VOL ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?? <br>? ? ? ? Temperature: 0.1¡ú / 0.1?? <br>Accuracy: O2: ¡Â3.0%FS ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? <br>? ? ? ?Temperature: ¡Â1.5¡ú <br>Response Time: T90&lt;15s ? ? ? ? ? ? ? ? <br>Alarm: Sound and light vibration alarm ? ? <br>Alarm Point: low alarm point 19.5%VOL ? ? ? ? ? ? ?? <br>? ? ? ? ?high alarm point 23.5%VOL ? ? ? ? ?? <br>Battery Type: 3 * AAA 1.5V Alkaline Batteries (NOT Included) <br>Operating Temperature: -15¡Î50¡ú / 5¡Î122? ?? ? <br>Operation Humidity: 15%¡Î95%RH (non condensation) <br>Item Size: Approx. 12 * 6.5 * 2.5cm / 4.7 * 2.5 * 1.0in (L * W * H) <br>Item Weight: Approx. 107.1g / 3.8oz <br>Package Size: Approx. 22.5 * 11.1 * 5.5cm / 8.9 * 4.4 * 2.2in (L * W * H) <br>Package Weight: Approx. 239g / 8.4oz <br><br><strong>Package List:</strong> <br>1 * O2 Detector <br>1 * User Manual <br>1 * Protection Bag