The AO2 sensor output varies with temperature, and a thermistor is integrated to compensate for these changes, providing a stable output across a wide temperature range. The AO2 PTB-18.10 oxygen sensor used in oxygen index meters is a consumable component. A chemical reaction begins when it is exposed to air. AO2 Product Parameters: (1) Output: 9–13 mV in air (2) Range: 0–100% O2 (3) Accuracy: 0.01% O2 (4) Expected service life: 360,000% O2 hours at 20°C, 286,000% O2 hours at 40°C, 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 signal: 100 ± 1% (8) Linearity: 0–100% O2 (9) Zero offset: Less than 20 µV (10) Operating temperature range: -20°C to +50°C (11) Temperature compensation: Less than 2% variation from 0°C to 40°C (12) Differential pressure range: 0–500 mbar maximum (13) Absolute pressure range: 500–2000 mbar (14) Relative humidity range: 0–99% non-condensing (15) Long-term output drift: Less than 10% signal loss per year (16) Recommended minimum load resistance: 10 kΩ Note: Product appearance may vary slightly between production batches, which does not affect functionality. Color: Red Material: Plastic Package Contents: 1 × Oxygen Sensor The package includes only the items listed above. Other products are not included. Note: Lighting effects and display settings may cause slight color differences between the image and the actual item. Measurement may vary by ±1–3 cm.