Specification:
Condition: Brand New
Model: 803
Sensor: Electrochemical Principle
Detection Gas: Oxygen O2
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: T90 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(not included)
Operating Temperature: -10~+50℃
Operation Humidity: 15%-95%(no condensation)
Weight: Approx. 176g / 6.2oz

Package List:
1 * Oxygen Gas Detector

Note:
1. Improper operation or inappropriate use of the environment may weaken the operating performance of the instrument. For the safest and most effective use of the instrument, please read the following correct operating procedures and safety
2. Please read the operation manual carefully before any operation is performed.
3. The window and filter membrane of the sensor must be kept clean. If the sensor window is blocked or filtered by the water film, it may result in a reading below the actual gas concentration
4. Tho replacement of batteries, maintenance parts and other operations can only be carried out in a safe environment.
5. In order to ensure the safety and the proper use of the instrument, the operation and maintenance of the instrument can only be carried out by qualified personnel.
6. Every day before use please check the accuracy of the instrument in the air, ensure that the measurement error is within the allowable range. If it exceeds the allowable error range, the instrument must be calibrated.