Thanks. I received the below email back from Purple air as well, looks like I will try cleaning first.
We have found that your sensor has been reporting unusually high readings in channel B, especially compared to nearby sensors. This channel has been automatically downgraded to ensure your data remains accurate. This is why the map dot is showing as dimmed. You can learn more by reviewing our ‘Transparent Sensors’ section in the Map Guide article.
It’s fine to continue using the sensor this way, with only one functioning laser counter, but for the best results, we recommend cleaning or replacing the counters.
Next Steps:
1. Try Cleaning First
Please follow our Sensor Maintenance Guide for instructions on cleaning the laser counters before replacing them.
2. If Cleaning Doesn’t Work
You can purchase replacement laser counters through our online store:
- Flex and Zen: PMS6003 (silver on the site)
All Plantower laser counters are pre-tested in PurpleAir test chambers before being sold.
3. Replacement Assistance
The Laser Counter Replacement Guide includes videos and step-by-step instructions to walk you through the process. If you’d like a quote, just let us know.
4. After Replacement or Cleaning
Please notify us once you’ve replaced or successfully cleaned the laser counters and the sensor is operating normally again. We’ll then clear the downgrade so both channels display correctly on the map.