FAQ

Shipping This sub-category relates to FAQ questions about PurpleAir shipping. Sensors This category relates to FAQ questions about PurpleAir sensors. Purchasing Welcome to our purchasing page. You will find most information on common questions from tax-exempt to doing a purchase order. Let us know if you have any questions. Real-Time Map This sub-category is related to FAQ questions about the PurpleAir map.

Topic	Replies	Views	Activity
PurpleAir FAQ FAQ Here is a selection of commonly asked questions. But these are not all questions or answers. Clicking on any one of the questions will take you to that question in our community forum. From there, you can search for more…	0	19940	March 1, 2023
About the FAQ category FAQ	1	2650	December 29, 2022
Q: What hostnames and ports do PurpleAir sensors use? Sensors	2	2213	November 7, 2025
I can't seem to log into PA, or see details (SN, etc) of my owned sensor Sensors	0	94	September 9, 2025
Sensor A is downgraded, but Sensor B is stuck at zero Sensors	4	223	September 3, 2025
Q: Can I add a mesh screen to my sensor to keep out bugs and critters? Sensors	0	5535	June 4, 2022
PA-II temp and RH data inconsistency? Sensors	0	61	July 30, 2025
Q: Why isn't my map location being saved? Real-Time Map	0	133	July 24, 2025
Q: Can I calibrate my PurpleAir sensor? Sensors	0	3786	June 4, 2022
Q. Can I calibrate the temperature sensor FAQ	0	157	July 13, 2025
Q. Does PurpleAir have an app? FAQ	12	14296	June 19, 2025
Q: How do the PurpleAir sensors differ, and can I mount them indoors OR outdoors? Sensors	1	2707	June 9, 2025
How Do I Know if my Sensor is Working Properly? FAQ	0	442	April 11, 2025
Q: Can I set my PurpleAir sensor to private, and how do I view a private sensor on the map? Real-Time Map	9	2959	February 21, 2025
Purchasing Purchasing	0	357	December 13, 2024
Q: Can I Take my Sensor on the Road? Sensors	0	345	December 18, 2024
Tax Exempt Purchasing	0	378	December 13, 2024
Purchase Orders Purchasing	0	1391	August 15, 2022
Payment Methods Purchasing	0	4593	June 2, 2022
Q. How to Request a Refund Purchasing	0	1315	October 20, 2021
Q: What does downgraded mean on the graph? Real-Time Map	0	1519	June 3, 2022
Indoor Sources of Particulate Matter (PM) FAQ	0	531	June 4, 2024
Q: What do I do With a Replacement Sensor? Real-Time Map	0	200	September 25, 2024
Is there a package with indoor and outdoor sensors? Purchasing	1	226	September 12, 2024
Micro SD Card Sensors	4	390	July 24, 2024
How do I match PurpleAir's Map with AirNow's Fire and Smoke Map? FAQ	0	1438	July 26, 2023
Q: Can I add data from non-PurpleAir sensors? Real-Time Map	0	2101	June 3, 2022
Q: Why are my sensor's LEDs blue? Sensors	0	1172	January 12, 2024
Q: LCS vs FRM/FEM Sensors	0	177	June 27, 2024
Q: How Do I Calculate My API Call's Point Cost FAQ	0	588	May 29, 2024