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 | 6081 | 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 | 1919 | 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 | 201204 | November 6, 2023 |
| How best to compensate for Fog? |
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0 | 1 | January 2, 2026 |
| wired/Ethernet connection option still planned? |
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16 | 630 | January 2, 2026 |
| VOC of 450 - EPA of 0 |
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2 | 39 | December 30, 2025 |
| CO2 sensor |
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7 | 1298 | December 27, 2025 |
| Pa-ii-flex on 7.04 still has wifi connecting banner and thingspeak connections |
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0 | 18 | December 27, 2025 |
| Do sensors decline in accuracy |
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2 | 35 | December 24, 2025 |
| Flex A + B Don't Match - Problem? |
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0 | 37 | December 13, 2025 |
| Purple Air Sensor without WIFI |
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5 | 388 | November 24, 2025 |
| SD Card Logging and Troubleshooting |
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12 | 6105 | November 13, 2025 |
| How Does the Bosch Sensor in the PIXEL Work? |
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0 | 36 | November 11, 2025 |
| 5 GHz Sensor? |
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3 | 54 | November 9, 2025 |
| Which Sensor to Choose |
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18 | 79718 | November 6, 2025 |
| Spurious spike on indoor sensor |
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3 | 63 | October 31, 2025 |
| No reading indoors |
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3 | 50 | October 23, 2025 |
| How to reset downgraded sensor channel? |
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12 | 358 | October 23, 2025 |
| Restarting after unplugging |
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4 | 461 | October 22, 2025 |
| Flex-2 isn't correlating well with my state's FEM monitor |
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4 | 53 | October 22, 2025 |
| Que puedo hacer si perdi mi correo de asociacion? |
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1 | 14 | October 22, 2025 |
| Averaging Time for LED Colors |
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1 | 77 | October 22, 2025 |
| Outdoor PA-II-Zen 7.04.- intranet webpage disappears, requires power cycling |
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1 | 95 | October 22, 2025 |
| LED color is cool but flashing is super distracting |
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1 | 69 | October 16, 2025 |
| How to Flash Firmware to Your Sensor |
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0 | 739 | August 22, 2024 |
| Find operator of sensor? |
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1 | 34 | October 2, 2025 |
| VOC sensor measurements? |
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3 | 83 | September 29, 2025 |
| Replace USB adapter |
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2 | 44 | September 26, 2025 |
| Not so sure these reflect actual air qual |
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3 | 118 | September 26, 2025 |
| Device ID (MAC address) is missing one character? |
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5 | 79 | September 26, 2025 |