The PurpleAir Classic air quality monitor is the original and popular PurpleAir sensor. It measures real-time PM2.5 concentrations for residential, commercial, or industrial use and can be installed indoors or outdoors. Built-in WiFi enables the air quality measurement device to transmit data to the real-time PurpleAir Map, which is stored and made available to any smart device.
The PA-II is available in two editions. The SD edition includes an onboard SD logger to record and store data without a WiFi connection.
Please note: This sensor does not come with a power adaptor. Find a suitable OUTDOOR-rated adaptor here or use your own USB power source (any 5V, 1.2 to 2.4 amp adaptor will work).
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference, and
This device must accept any interference received, including interference that may cause undesired operation.
Warning (Part 15.21)
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b))
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
To comply with FCC/IC RF exposure limits for general population / uncontrolled exposure, the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
Remove the microSD card by pushing it in to unlatch and then pull out with tweezers. Insert the SD card into a computer to access the csv and data files.
More information on working with SD data is available here on the PurpleAir community site.
We also provide a software tool to help work with this data here.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
This device may not cause harmful interference, and
This device must accept any interference received, including interference that may cause undesired operation.
Warning (Part 15.21)
Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
FCC Interference Statement (Part 15.105 (b))
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
To comply with FCC/IC RF exposure limits for general population / uncontrolled exposure, the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
We live in an area where the EPAs AirNow sensor covers a huge area, one separated by a lot of topography, including a significant mountain range. I have asthma and live in an area where wildfires and inversions frequently make the air quality poor enough for me to avoid either 1) going out in it without an N95 mask, or 2) letting unnecessary quantities into the house. We purchased the PurpleAir Classic so we would now exactly what the AQI is throughout the day in our location.
S
Stephen Martinez
Works like the one it replaced
I was fortunate to work with Purple Air’s Customer Service team to address a quirky failure mode on my several year old unit. Once the decision was made, the store shipped the unit and a USB cord to replace the one I sent in.
Unfortunately the USB cord had a female type end for the tie into my equipment that needed a male end. I had another to use and now have a unique cable that might need useable on some future project.
The store provided me tracking information to allow me to anticipate the unit’s delivery.
T
Tim Garrigan
I can’t get it connected
I have tried numerous times to connect it to our wifi network and no luck. The we code isn’t recognized and I’m at a loss. Is it defective? What am I missing?
Hi Tim,
We're sorry that you've been running into issues connecting your sensor to WiFi. We're happy to help you troubleshoot if you send an email to contact@purpleair.com.
S
Salman Alam
Riew
Its been almost 22 days i have installed the new purple air PA-II sensor,so far its performance is very good, no issues found at all. Indeed a very good brand.
C
CSL
Great monitor, very poor instructions
Bought 3: for 2 grown intelligent daughters and for hubby and me. Live in the west. Had to scan the barcode for instructions which led to multiple websites and a huge headache and more clicking and loading. Smart people created the monitor, wish that were true for instructions. And no power cord! Really. Love the product but am truly disappointed you all could not make setting up instructions a little more clear..and where to mount it? And does it withstand direct sun or blizzard conditions or rain? For $220 dollars you could have done better.
