7OXV generally used in the fixed oxygen alarm device, the service life is generally about two years, low-cost, high quality 7OX-V oxygen sensor Nominal measuring range: 0-25% Overload: 30% Life: 2 years (in the air) Output signal: 0.195 - 0.25mA (in air) Response time: ≤ 15s Temperature range: -20 ° C to + 50 ° C Temperature coefficient: 0.2% signal / ° C Absolute pressure range: atmospheric pressure ± 10% Differential pressure range: 0 to 40mBar (max) Pressure coefficient: <0.02% signal / mBar Humidity range: 0 to 99% RH intermittent operation 15 to 99% RH continuous work Long-term output drift: <5% signal loss / year The load resistance is recommended to be 100Ω