can effectively ensure the safety of the staff's life is not infringed, the production equipment is not lost. 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. 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.Specification:Sensor: Electrochemical PrincipleTest Gases: Oxygen Concentration (O2)Temperature Measurement: Ambient Temperature Display Unit: O2: %VOL Temperature: ℃/℉ Measurement Range: O2: 0 ~ 25%VOL Temperature: -15~50℃ / 5~122℉ Resolution: O2: 0.1%VOL Temperature: 0.1℃ / 0.1℉ Accuracy: O2: ±3.0%FS Temperature: ±1.5℃Response Time: T90