PurpleAir Classic Air Quality Monitor
PurpleAir Classic Air Quality Monitor
PurpleAir Classic Air Quality Monitor
PurpleAir Classic Air Quality Monitor
PurpleAir Classic Air Quality Monitor
PurpleAir Classic Air Quality Monitor
PurpleAir Classic Air Quality Monitor

PurpleAir Classic Air Quality Monitor

Regular price
$229.00
Sale price
$229.00

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).

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Shipping calculated at checkout.

  • Classic PurpleAir PA-II particulate sensor
  • Dual Laser Particle Counters (PMS-5003)
  • Pressure, Temperature & Humidity Sensor (BME280)
  • WiFi connectivity with data stored in the cloud
Classic PurpleAir dual laser particulate sensor
Dimensions 3.5 in x 3.5 in x 5 in
(85 mm x 85 mm x 125 mm)
Color White
Power requirements 5V USB Micro, 0.18A continuous, 600mA peak
Intended Use Outdoor and indoor use
WiFi Yes
Expansion Port No
Internal Storage No
Warranty One (1) year limited warranty
Laser Particle Counters

Class 1 Laser. A Class 1 laser is safe under all conditions of normal use.

Manufacturer Plantower

This device contains two particle detectors to provide redundancy and help determine sensor health.

Type PMS-5003 (2)
Range of measurement 0.3, 0.5, 1.0, 2.5, 5.0, & 10 μm
Counting efficiency 50% at 0.3μm & 98% at ≥0.5μm
Effective range
(PM2.5 standard)*
0 to 500 μg/m³
Maximum range (PM2.5 standard)* ≥1000 μg/m³
Maximum consistency error (PM2.5 standard) ±10% at 100 to 500μg/m³ & ±10μg/m³ at 0 to 100μg/m³
Standard Volume 0.1 liter
Single response time ≤1 second
Total response time ≤10 seconds
Pressure, Temperature, & Humidity Sensor
Manufacturer BOSCH
Model Number BME280
Temperature range -40°F to 185°F (-40°C to 85°C)
Pressure range 300 to 1100 hPa
Humidity Response time (τ63%): 1s
Accuracy tolerance: ±3% RH
Hysteresis: ≤2% RH
Wireless

Contains Transmitter Module FCC ID: 2AC7Z-ESPWROOM02D

Wireless Networks 802.11b/g/n @ 2.4GHz
(WPA2 pre-shared key or open networks)
Certificates FCC/CE/TELEC/SRRC
Tx Power 802.11 b: +20 dBm
802.11 g: +17 dBm
802.11 n: +14 dBm
Rx Sensitivity 802.11 b: -91 dbm (11 Mbps)
802.11 g: -75 dbm (54 Mbps)
802.11 n: -72 dbm (MCS7)
Antenna Type 2 dBi on-board PCB antenna

FCC Compliance Statement (Part 15.19)

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

  1. This device may not cause harmful interference, and
  2. 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.

Customer Reviews

Based on 84 reviews
69%
(58)
14%
(12)
5%
(4)
4%
(3)
8%
(7)
S
Sharon Barnes
Nice To Know The Actual AQI

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.