# DrägerSensor XXS O2, P/N: 6810881
> Type: Electrochemical oxygen sensor, XXS format
## Weight
**0.018 kg (18 g / 0.04 lb)**
## English Specification
1. **Function**
Electrochemical oxygen sensor for measuring oxygen concentration in ambient air, spare replacement sensor for Dräger portable gas detectors.
2. **Measuring Range**
0 – 25 vol.% O₂
– Resolution: 0.1 vol.%
– Accuracy: ±0.3 vol.% O₂
– T90 response time: ≤15 s
3. **Lifetime**
Typical service life: 4 years (in normal ambient air)
4. **Compatibility**
Fit for Dräger Pac 6000, Pac 6500, X‑am 5000, X‑am 5500, X‑am 5800 gas detectors
5. **Environmental condition**
– Operating temperature: -20 ℃ ~ +50 ℃
– Pressure: 700 – 1300 mbar
– Humidity: 10 – 95 % RH, non‑condensing
6. **Mechanical**
Compact XXS miniature package, plug‑in design, direct replacement without soldering.
7. **Certification**
Compliant with EN 50104; ATEX / IECEx approved for portable gas detection
8.