Sensors
Troubleshooting This category provides a selection of articles and topics to assist users with troubleshooting problems associated with setting up, maintaining, and using PurpleAir sensors.
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Sensor Owner's Guide
Introduction Welcome to PurpleAir! By purchasing a sensor, you have joined a worldwide network of people striving to better understand their air. You can now contribute to that network by setting up your device. Doing … |
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7 | 8670 | August 18, 2025 |
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About PurpleAir Sensors
This category serves as a knowledge base for information regarding PurpleAir sensors and other hardware. Here you can find information about setting up your sensor, troubleshooting, and other related topics. If you have … |
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2 | 2223 | January 24, 2025 |
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Sensor WiFi and Registration
This guide will walk you through connecting your sensor to WiFi and registering it on the PurpleAir map. Please recognize that these are separate processes, and don’t need to be completed at the same time or in the sam… |
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13 | 224650 | November 6, 2023 |
| Zen sensor only shows red and is constant |
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0 | 4 | October 13, 2026 |
| Sensor Maintenance |
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3 | 15844 | October 8, 2026 |
| My sensor is not starting |
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2 | 55 | October 3, 2026 |
| Sensor will not save WiFi password |
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3 | 181 | September 29, 2026 |
| FLEX temperature and VOC units |
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1 | 36 | September 24, 2026 |
| Correction equation for newer generation hardware? |
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0 | 37 | September 7, 2026 |
| Watch Duty claims my sensor is offline IT IS NOT |
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2 | 47 | September 2, 2026 |
| Discrepancy with Nearby Sensor |
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5 | 75 | August 10, 2026 |
| Replacement Parts Sought for 5 yr old PA-II Classic |
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1 | 42 | August 3, 2026 |
| WiFi & Status Indicators |
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4 | 124 | July 30, 2026 |
| SD Card Overview |
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1 | 584 | July 30, 2026 |
| Zen - 3 white one red |
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1 | 56 | July 28, 2026 |
| Sensor B is downgraded, but Sensor A is stuck at zero |
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2 | 68 | July 23, 2026 |
| Sensor A is downgraded, but Sensor B is stuck at zero |
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5 | 327 | July 15, 2026 |
| 5 year old PA-II repairable? |
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11 | 1084 | July 1, 2026 |
| Temperature sensor oscillations |
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2 | 87 | June 26, 2026 |
| Blizzard killed many PA rh sensors |
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1 | 128 | June 25, 2026 |
| 2025 Plantower PMS5003 variation |
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3 | 157 | June 25, 2026 |
| wired/Ethernet connection option still planned? |
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18 | 838 | June 25, 2026 |
| Running a PurpleAir sensor off a power bank (daily charging setup) |
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0 | 77 | June 25, 2026 |
| SD Card Troubleshooting |
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13 | 7066 | June 25, 2026 |
| New version of Plantower PMS5003 |
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34 | 5921 | June 24, 2026 |
| Sensor Issue |
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1 | 93 | June 18, 2026 |
| WiFi Band 2.4 vs. 5 G |
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2 | 341 | June 18, 2026 |
| Connecting a purple air sensor to my server |
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8 | 309 | June 16, 2026 |
| Weak/defective Sensor? |
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0 | 51 | May 22, 2026 |
| Ferrite Power Supply in PA Flex |
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0 | 41 | May 21, 2026 |