XD1+
degradation study

We recently conducted 8 tests on XD1+ to evaluate the potential for “accuracy drift” when exposed to heavy dust loading without routine cleaning activities.

Each test involved dosing 100mg of ISO12103-1 A2 dust into the chamber every 2 hours over an 8-hour period.  

The study aimed to replicate challenging operational conditions in which the XD1+ can be deployed. 

1. No statistically significant differences were detected between average PM4.25 readings for any test condition pairs

2. The absence of significant differences suggests that, under the tested conditions, there is no measurable evidence of performance degradation in the XD1+ units that would affect PM4.25 measurement accuracy

3. Variations observed in the raw data likely reflect normal measurement variability rather than systematic drift or degradation of sensor performance

4. This stability in performance is important for long-term monitoring, as it indicates that the XD1+ units maintained consistent PM4.25 readings across the test period

The results demonstrate consistent XD1+ performance across all test conditions, with no significant degradation observed despite repeated exposure to high dust concentrations and the absence of cleaning. This underscores the instrument’s robustness and reliability in demanding environments.

It should be noted that while these findings highlight the resilience of the XD1+, they don’t replace the need for routine compliance testing to be done. Regular upkeep remains essential for optimal long-term performance.

Please consult the XD1+ user manual for guidance on carrying out a compliance check to your AIR X units.