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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8 | 7206 | 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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4 | 2075 | 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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14 | 210684 | November 6, 2023 |
| Weak/defective Sensor? |
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0 | 12 | May 22, 2026 |
| Ferrite Power Supply in PA Flex |
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0 | 23 | May 21, 2026 |
| New version of Plantower PMS5003 |
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33 | 5559 | May 18, 2026 |
| Difficulty connecting and staying connected to Wifi |
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4 | 136 | May 16, 2026 |
| Sensor Doesn't log data |
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2 | 35 | May 7, 2026 |
| Sensors not reporting correctly |
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1 | 61 | May 3, 2026 |
| PA-I light is off, flickers, seems to indicate trouble? |
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0 | 13 | May 3, 2026 |
| System refuses to let me update the monitor |
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1 | 35 | April 20, 2026 |
| How to reset downgraded sensor channel? |
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14 | 456 | April 8, 2026 |
| Poor Sensor correlation |
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5 | 70 | April 5, 2026 |
| Temperature sensor oscillations |
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1 | 44 | March 16, 2026 |
| Bug Report - SD card fails when launched cold |
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6 | 120 | March 12, 2026 |
| Inconsistent PM2.5 readings when using automated API polling from mobile environments? |
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1 | 18 | March 10, 2026 |
| I bought a sensor off ebay |
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5 | 91 | March 4, 2026 |
| Blizzard killed many PA rh sensors |
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0 | 61 | February 26, 2026 |
| Particle counts are too low |
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2 | 62 | February 3, 2026 |
| 2025 Plantower PMS5003 variation |
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2 | 55 | January 29, 2026 |
| Connecting to a wpa3 network |
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3 | 146 | January 29, 2026 |
| Como modificar el sensor en el mapa de muestro |
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1 | 29 | January 21, 2026 |
| wired/Ethernet connection option still planned? |
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17 | 699 | January 19, 2026 |
| SD Card Overview |
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0 | 309 | January 16, 2026 |
| Troubleshooting Missing SD Card Data |
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0 | 142 | January 16, 2026 |
| Zen LEDs displaying a rainbow of colors |
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2 | 342 | January 16, 2026 |
| How best to compensate for Fog? |
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0 | 87 | January 2, 2026 |
| VOC of 450 - EPA of 0 |
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2 | 61 | December 30, 2025 |
| CO2 sensor |
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7 | 1396 | December 27, 2025 |
| Pa-ii-flex on 7.04 still has wifi connecting banner and thingspeak connections |
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0 | 32 | December 27, 2025 |