1. The output of the AO2 sensor changes with temperature, but the thermistor is gradually integrated to compensate for these changes. The thermistor is used to give the AO2 a stable output over a wide temperature range. 2. The AO2 PTB-18.10 oxygen sensor used in the oxygen index meter is a consumable item. When it comes into contact with air, a chemical reaction begins. 3. AO2 Product Parameters: 4. (1) Output:9-13mV in air 5. (2) Range:0-100%O2 6. (3) Accuracy:0.01%O2 7. (4) Expected service life:360,000%O2 hours at 20, 286,000%O2 hours at 40, or two years in air at STP 8. (5) T90 response time:Less than 5 seconds 9. (6) T99.5 response time:Less than 40 seconds 10. (7) 100% oxygen in signal:1001% 11. (8) Linearity:0-100%O2 12. (9) Zero offset:Less than 20V 13. (10) Temperature range:-20-+50 14. (11) Temperature compensation:Less than 2% variation 0 to 40(as shown) 15. (12) Differential pressure range:0-500mbar Max 16. (13) Absolute pressure range:500-2000mbar 17. (14) Relative humidity range:0-99% non-condensing 18. (15) Long-term output drift:Less than 10% signal loss/year 19. (16) Recommended load resistance min:10kohm 20. Note:Due to different production batches, the product appearance slightly, which does not affect the use. 21. Colour:Red 22. Material:Plastic 23. Package Contents: 24. 1 * Oxygen Sensor 25. Only the above package content, other products are not included. 26. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.