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Technical performance：

1. Range: 0-100% 0-25% 0-5%

2. Accuracy: ±0.15% (when the oxygen content is less than 5%) ±0.3% (when the oxygen content is less than 5%), ±3% (when the oxygen content is more than 50%).

3. Operating environment temperature: -10～40℃ Humidity: <90%

4. Response time: 10 seconds can indicate 90% of oxygen concentration (at 20°C).

5. Method of use: hand pinch suction.

6. Power supply: 6F229V laminated battery. It can work continuously for 500 hours.

7. Dimensions: 160×85×28 mm3.

8. Weight: 150 grams.

9. Interference gas that affects detection accuracy: SO2, NO2, H2S, etc. ≥10% will affect the measurement.

10. Resolution: 0.01%.

11. Measurement method: integral method, display reading: three and a half liquid crystal display.

12. Power consumption: 4 milliwatts.<