The oxygen sensor, GYH25 oxygen sensor mine oxygen sensor, GYH25 mine with an oxygen sensor, selling oxygen sensor, oxygen sensor technology indicators technical indicators, measuring range: (0.00 ~~ 25.0)% O2 2 measurement error: (0.00 to 25.0 )% O2, is not greater than ± 3% FS 3, alarm point: (0.00 to 25.0)% O2 within arbitrarily set alarm point 4 alarm error: ± 0.5% 5 alarm mode and effects: sound, light alarm effect: sound, light meters from the axial distance from the sound source, sound intensity is not less than 80dB (A); visibility in the dark is not less than 20m. Alarm resolution: 0.01% CH4, response time: not more than 60s 8, the output signal: 200 to 1000Hz (pulse width greater than 0.3ms) 9 product life: ≥ 1 year 10 Ex-mark: ExibI Mb 11, Dimension: 270mm × 133 mm × 54mm 12 environmental conditions: temperature: 0 to 40 ° C; relative humidity: ≤ 98% RH; Pressure: 80kPa ~ 116kPa Wind Speed: 0 to 8m / s coal mine with explosive gas environment 13, the maximum operating current (alarm): ≤ 200mA. 14, transmission distance: ≥ 2km. 15, the whole working voltage: 9 ~ 24V.DC.