Classic - Air Quality Monitor

Regular price: $229.00
Sale price: $229.00

The PurpleAir Classic is our original and most popular air quality monitor.

Designed for outdoor use, this sensor is perfect for residential, commercial, or industrial users looking to collect real-time PM2.5 AQI data. Connect it to WiFi to transmit that data to the interactive map, which is accessible by any smart device. This model is also available with an SD logger for offline data collection.

NOTICE: Power supply NOT included; find a suitable option here.

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Overview
Specs

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: 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.

Overview
Specs

Classic PurpleAir PA-II-SD particulate sensor with microSD logger
Dual Laser Particle Counters (PMS-5003)
Pressure, Temperature & Humidity Sensor (BME280)
Built-in SD card logging and real-time clock for offline data capture
WiFi connectivity with data stored in the cloud

Classic PurpleAir dual laser particulate sensor with on-board SD card logger
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	Yes, 32GB microSD
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

Built-in SD Card Logger & Real-time Clock
Real-time Clock (RTC)	DS3231 Extremely accurate I2C real-time clock
Real-time Clock Battery	CR2032 3V
SD Card	MicroSD card Takes microSD cards up to 64GB
SD Card Format	FAT32
SD Card Data Access	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.

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: 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.

Unit completely rusted out, no warranty coverage

So I have purchased 3 of the PA-II models. One of them completely rusted / corroded out and stopped working. No warranty coverage. Had to just toss it and abandon the site. 35% failure rate is pitiful. Really disappointed with the quality of these units.

Hello,

We apologize that you've been experiencing this amount of trouble. If you would like, we're happy to assist in any way we can or talk about warrarnty coverage in an email to contact@purpleair.com.

Indoor air quality

Our indoor sensor has been indispensable during fire season.

As of now, they're still in the boxes sent to us, and have not been distributed yet. But we've ordered dozens of them before and like them better than the "Touch." We just wish they would detect something besides PMs (reliably). Thanks.

Solid unit

The sensor is good quality. The setup was relatively painless, but I had to try to register 4 times before it worked on the website. I was happy to see how easy it was to pull the data into Home Assistant. Would love to have been able to get a POE (power-over-ethernet) model. Glad to have some coverage on the map where I live!

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.

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Classic - Air Quality Monitor

Customer Reviews