We copied the below from Draeger Safety

Product Launch: XXS O2

We’re excited to announce the launch of the NEW XXS O₂ Sensor (Part No. 6800530)! This updated sensor replaces the legacy model (Part No. 6810881), which remains available for now but will be phased out in the near future. The XXS O₂ Sensor will become the new default for the majority of our portable devices moving forward. If you have any questions or need support transitioning to the new sensor, feel free to reach out.

Dräger is again driving innovation, and here are the key benefits:

• Additional filter. This filter reduces clogging of the sensor capillary by external deposits. The abbreviation “PR” stands for “Poison Resistant”
• Extended measurement range of 30 vol.%
• Increased response time (t90) by 3s (t90 = 13s)

Warranty: 5-years