Domestic TN-10 / O2 portable oxygen detector portable oxygen detection alarm TN-10 portable oxygen detection alarm range of applications: in iron and steel smelting, petrochemical, fire and rescue, coal mine, municipal utilities, pulp and paper and other fields have a wide range applications. Main features: ◆ Protection IP66 waterproof and dustproof design highly suitable for use in harsh environments ◆ 20 meters altitude fall intact shell is made of high strength plastic, composite non-slip rubber refined, high strength, feel good ◆ battery without charge 2-year service life and replaceable battery ◆ CR15H270 camera quality imported electrochemical gas sensor, with excellent sensitivity and excellent repeatability ◆ The detector can be set lower limit, upper limit, TWA and STEL alarm points ◆ uninterrupted LCD displays real-time gas concentration, super sound, light, vibration, etc. 3 kinds of alarm function ◆ POST function; with automatic calibration and auto-zero function ◆ password management capabilities required calibration time password authentication, effectively prevent misuse ◆ volume Small, light weight (108mm × 61mm × 40mm) approximately 100 grams applicable environmental conditions ● Ambient temperature is -10 ~ 40 ℃; ● altitude less than 2000m; ● atmospheric pressure is 80kPa ~ 106kPa; ● ambient air relative humidity less than 98 % (non-condensing); ● no damage to insulation corrosive gas or steam environment; Explosion-proof type: Mine intrinsically safe; proof mark: ExibI. Intrinsically safe power supply: standard single-cell lithium-manganese battery CR15H270; Battery maximum open circuit voltage Uo: 3.0V, the maximum short-circuit current Io: 7A; detector maximum operating current (alarm) 150mA; Working time: 2 years (non-alarm, backlight closed state); chemical formula parameters measured gas technical indicators measuring range Resolution alarm 0-25% vol O2 oxygen under 0.1% vol 18% vol, a 23% vol