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 begins. AO2 Product Parameters: (1) Output:9-13mV in air (2) Range:0-100%O2 (3) Accuracy:0.01%O2 (4) Expected service 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) 100% oxygen in signal:1001% (8) Linearity:0-100%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 load resistance min:10kohm Note:Due to different production batches, the product appearance slightly, which does not affect the use. Colour:Red Material:Plastic Package Contents: 1 * Oxygen Sensor Only the above package content, 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 measurement allowed error is +/- 1-3cm. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.