FAQ

Sensors This category relates to FAQ questions about PurpleAir sensors. Shipping This sub-category relates to FAQ questions about PurpleAir shipping. 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	21754	March 1, 2023
About the FAQ category FAQ	1	2791	December 29, 2022
Does PurpleAir have an app? Sensors	13	15153	July 24, 2026
What hostnames and ports do PurpleAir sensors use? Sensors	2	2343	November 7, 2025
Can I add a mesh screen to my sensor to keep out bugs and critters? Sensors	0	5765	June 4, 2022
Why isn't my map location being saved? Real-Time Map	0	190	July 24, 2025
Can I calibrate my PurpleAir sensor? Sensors	0	3971	June 4, 2022
Can I calibrate the temperature sensor FAQ	0	194	July 13, 2025
How do the PurpleAir sensors differ, and can I mount them indoors OR outdoors? Sensors	1	2896	June 9, 2025
How Do I Know if my Sensor is Working Properly? FAQ	0	536	April 11, 2025
Can I set my PurpleAir sensor to private, and how do I view a private sensor on the map? Real-Time Map	9	3114	February 21, 2025
Purchasing Purchasing	0	410	December 13, 2024
Can I Take my Sensor on the Road? Sensors	0	372	December 18, 2024
Tax Exempt Purchasing	0	446	December 13, 2024
Purchase Orders Purchasing	0	1450	August 15, 2022
Payment Methods Purchasing	0	4623	June 2, 2022
How to Request a Refund Purchasing	0	1370	October 20, 2021
What does downgraded mean on the graph? Real-Time Map	0	1568	June 3, 2022
Indoor Sources of Particulate Matter (PM) FAQ	0	562	June 4, 2024
What do I do With a Replacement Sensor? Real-Time Map	0	222	September 25, 2024
How do I match PurpleAir's Map with AirNow's Fire and Smoke Map? FAQ	0	1521	July 26, 2023
Can I add data from non-PurpleAir sensors? Real-Time Map	0	2176	June 3, 2022
Why are my sensor's LEDs blue? Sensors	0	1218	January 12, 2024
LCS vs FRM/FEM Sensors	0	190	June 27, 2024
How Do I Calculate My API Call's Point Cost FAQ	0	626	May 29, 2024
Does SD Card Data Get Uploaded to the Map? Sensors	0	241	June 19, 2024
How do I view Outdoor/Indoor/My PurpleAir sensors? Real-Time Map	0	1077	June 3, 2022
Should I use the conversion factors on the PurpleAir map? Real-Time Map	4	5241	March 14, 2024
How do I download sensor data? Sensors	3	6241	March 4, 2024
My Zen LED's have gone dark. Did they fail? Sensors	8	2321	December 31, 2023