Zen - Air Quality Monitor
- Regular price
- $299.00
- Sale price
- $299.00 Sale
The PurpleAir Zen is our flagship air quality monitor.
Featuring a swappable base mount, the Zen is built to be used inside or out. Powerful LEDs dynamically change colors based on the AQI scale, providing an instant visual representation of air quality at a glance. Whether from across a room or across the yard, know your air quality with ease. Utilize its double-tap feature to cycle through brightness levels and connect it to WiFi to see its real-time PM2.5 data on the interactive map, accessible by any smart device. Its modular design provides easy access to internals and is perfect for residential, commercial, or industrial users.
This sensor contains an SD logger for offline data collection but does not come with a microSD card.
NOTICE: Power supply NOT included; find a suitable option below.
- The latest PurpleAir sensor with built in full color LED ring, and a tap sensor to adjust the brightness by tapping the sensor. This one can be used indoors and out with the included desktop or wall (or pole) mount.
- Tap sensor for adjusting LED brightness, double tap the sensor to adjust LED brightness.
- User replaceable dual Laser Particle Counters (PMS-6003)
- Pressure, Temperature, Humidity & Gas Sensor (BME688)
- Built-in SD card logging and real-time clock for offline data capture
- WiFi connectivity with data stored in the cloud
Dimensions | 3.5 in x 3.5 in x 4 in (85 mm x 85 mm x 100 mm) |
Color | Semi transparent |
Power requirements | 5V USB Micro, 0.18A continuous, 600mA peak |
Intended Use | Outdoor and indoor use |
WiFi | Yes |
Expansion Port | Yes |
Internal Storage | Yes, optional microSD |
Warranty | One (1) year limited warranty |
Tap sensor for adjusting LED brightness, double tap the sensor to adjust LED brightness. | |
Manufacturer | Kionix, Inc. |
Model Number | KX122-1037 |
Temperature range | -40°F to 185°F (-40°C to 85°C) |
Mechanical Shock (powered and unpowered) | 5,000g for 0.5ms 10,000g for 0.2ms |
Laser Particle Counters
Class 1 Laser. A Class 1 laser is safe under all conditions of normal use. |
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Manufacturer | Plantower |
This device contains two particle detectors to provide redundancy and help determine sensor health. |
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Type | PMS-6003 (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, & Gas Sensor | |
Manufacturer | BOSCH |
Model Number | BME688 |
Temperature range | -40°F to 185°F (-40°C to 85°C) |
Pressure range | 300 to 1100 hPa |
Humidity | Response time (τ63%): 8s Accuracy tolerance: ±3% RH Hysteresis: ≤1.5% RH |
Gas | Response time (τ33-63%): <1s Resolution: ±0.08% |
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 |
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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:
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:
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. |
I purchased a PurpleAir Touch for indoor air monitoring and a Zen for outdoor use to track air quality during ongoing remediation and debris removal following a wildfire. I’m also encouraging neighbors to install sensors for broader coverage. So far, I’ve been able to track daily cycles and establish solid baseline metrics. I plan to monitor long-term as environmental conditions evolve.
Setup & Installation:
Setup was relatively straightforward, though reading the online manual is essential. They provide QR codes to access on the packaging. I highly recommend purchasing the exterior power supply for the Zen—however, the connection between the power supply and the device feels somewhat exposed and could be more robust. When installing, avoid dangling the sensor from the power cord.
Connectivity & Usage:
Once powered on and connected to Wi-Fi, registering the device on PurpleAir’s platform was intuitive. Expect a mild learning curve, but the system provides valuable real-time data once set up.
Room for Improvement:
I wish it were easier to register and reposition the device, especially in a fire zone where setup conditions can be challenging. That said, this isn't a major issue.
Overall, PurpleAir provides excellent tools for tracking air quality, with solid data insights and a relatively simple setup process. The software and community is unparalleled. Strongly recommend.
Works great and provides good interface for viewing both through web interface and apps.
I've been eager to get one of these for a while and was finally able to swing it.
The setup was relatively easy compared to other electronics that need to connect to the Internet.
EPA's own words and its official use in municipalities and institutions make clear that it's much more than a hobbyist instrument.
I often use the cigarette equivalent when communicating local air quality on local social media -- this is less abstract and thus more useful than the typical color ratings, which, by the way, aren't standardized.
Next step is to encourage my municipality to take it more seriously as part of a plan to eliminate household smoke.
A new concern, however, is the Trump administration 's position on the EPA.
p.s. After very carefully sealing the sensitive bits, I painted my unit black so that it is more stealthy on my apartment's balcony -- I suppose a black colored unit from the factory would be nice though I realize there can be an issue with heat absorption if it's placed in the sun (mine is not).
The connection where the power plug fits into the female receptical is hard to see and flimsy. This piece has separated from the main body. Consequently, I’m going to return the unit and ask for a replacement. The set up is straightforward.
Really great functional product but the UI could improve and be optimized for mobile. I don't enjoy having to log in each time to see my private units. Would love to see alerts.