Digital Display Oxygen Gas Leak Detector specification as follow

Sensor: Electrochemical Principle

Detection Gas: Oxygen 02

Temperature Measurement: Ambient Temperature

Display Unit: O2: %VOL

Temperature: ℃/℉

Range: O2: 0~25%VOL

Temperature: -15~50℃

Resolution: O2: 0.1% VOL

Temperature: 0.1℃-0.1℉

Response Time: T 90 Less Than 15s

Alarm: sound and light alarm

Alarm Point: low alarm point 19.5%VOL

High alarm point 23.5%VOL

Battery Type: 3 * AAA/7 alkaline batteries

Operating Temperature: -10~+50℃

Operation Humidity: 15%-95%RH (no condensation)