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 very stable output over a wide temperature range. 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 starts. AO2 Product Parameters: (1) Output: 9-13mV in air (2) Range: 0- O2 (3) Accuracy: 0.01 O2 (4) Expected Life: 360,000 O2 hours at 20, 286,000 O2 hours at 40, or two years in air at STP (5) T90 Response Time: Less than 5 seconds (6) T99.5 Response Time: Less than 40 seconds (7) Oxygen in Signal: 1001 (8) Linearity: 0- O2 (9) Zero Offset: Less than 20V (10) Temperature Range: -20-+50 (11) Temperature Compensation: Less than 2 variation 0 to 40 (as shown) (12) Differential Pressure Range: 0-500mbar Max (13) Absolute Pressure Range: 500-2000mbar (14) Relative Humidity Range: 0-99 non-condensing (15) Long-term Output Drift: Less than 10 signal loss/year (16) Recommended Minimum Load Resistance: 10kohm Note: Due to different production batches, the appearance of the product may vary slightly, which does not affect the use. Color: Red Material: Plastic Package Contents: 1 * Oxygen Sensor The above package content only, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The allowed measurement error is +/- 1-3 cm.