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PurpleAir · PA-II-ZEN

PurpleAir Zen

An indoor display monitor with two replaceable optical PM channels, temperature, humidity, pressure and gas-resistance context plus PurpleAir map and optional microSD data
Market statusCurrent supported dual-channel indoor particulate monitorChecked Aug 18
Reference price$299 current direct U.S. pricePurpleAir's current Zen page lists PA-II-ZEN at $299 and notes a possible fulfillment delay
Product cyclecurrentRelease history under review
EvidenceWell supported7 publishers · 2 independent
Next full checkAug 25, 2026Price checks run sooner
01

Ready to buy

Confirm the exact monitor and data path

The retained reference is $299 current direct U.S. price. Confirm the model, sensors, calibration, sampling, app or local history, privacy, power, placement, stock, returns and written U.S. support before payment.

Buying stageMarket familiarity
02

Current market

The facts that change the ownership choice

Each line carries its own check date because price, software, specifications, and product cycle do not age at the same speed.

QuestionCurrent answerFreshnessBasis

Current price

$299 current direct U.S. price

Confirm stock or backorder, included cable but separate power supply, optional microSD, tax, shipping, privacy setting and returns

Refresh due soonDirect source1 evidence item

Market branch

dual-channel particulate transparency and public or private mapping
Checked 6 days agoOur synthesis2 evidence items

Purchase boundary

The retained $299 excludes a USB power supply and optional microSD card, and the current page notes a possible backorder; the BME688 gas signal is not a pollutant-specific VOC concentration
Checked 6 days agoOur synthesis3 evidence items

Sensor suite and exclusions

Two Plantower PMS6003 optical channels report particle counts and PM1, PM2.5 and PM10 estimates, while BME688 supplies temperature, humidity, pressure and gas resistance; gas resistance is not a selective VOC, formaldehyde, CO or NOx measurement
Checked 6 days agoDirect source2 evidence items

Ranges, accuracy and disclosed gaps

The maker states a 0 to 500 µg/m³ standard PM range, readings above 1,000 possible, ±10 µg/m³ from 0 to 100 and ±10 percent from 100 to 500, with response at or below ten seconds under named conditions. Correction performance varies by aerosol and setting
Checked 6 days agoDirect source3 evidence items

Calibration, drift and response

The two PM channels provide a useful agreement check, not traceable calibration. Record A-B divergence, cleaning, fan or sensor replacement, firmware, correction and averaging; aerosol composition, high humidity and aging can change response
Checked 6 days agoOur synthesis5 evidence items

Data, app and cloud

The device display and optional microSD support local viewing and storage, while Wi-Fi feeds a public or private PurpleAir map and API. Record privacy mode, card capacity and overwrite behavior, averaging and the correction selected for analysis
Checked 6 days agoDirect source3 evidence items

Privacy boundary

A public map setting can expose location and time series; private operation still uses account and service data unless local card collection is isolated. Confirm map precision, sharing, API keys, retention, deletion and ownership before installation
Checked 6 days agoOur synthesis2 evidence items

Power and placement

Continuous 5 V micro-USB power is required and the wall adapter is not included. Keep both inlets clear and place in representative indoor air away from steam, humidifiers, vents, windows and direct emissions unless testing them
Checked 6 days agoOur synthesis3 evidence items

Service and lifecycle

The dual PMS6003 sensors are user-replaceable, but replacement is not traceable calibration. Confirm warranty, current module availability, fan cleaning, firmware, cloud and API continuity and the operator responsible for A-B checks
Checked 6 days agoDirect source2 evidence items

Interpretation boundary

Choose a PM correction appropriate to aerosol and comparison method, and use the two channels as quality-control clues. A public AQI color or outdoor comparison does not identify a source, diagnose harm, prove code compliance or establish safe re-entry
Checked 6 days agoOur synthesis5 evidence items

Consumer sensor versus reference method

Published ranges and nominal errors describe manufacturer conditions, not traceable performance for every unit, aerosol, gas mixture, humidity, firmware, age or site. Use co-location and documented quality checks; do not substitute this monitor for a regulatory, occupational, laboratory, radon or life-safety method.
Checked 6 days agoOur synthesis4 evidence items

Seller and region

The price is retained for a current U.S. new-device path. Confirm exact model, authorized seller, electrical and radio region, stock, tax, delivery, returns, written warranty, replacement parts, app and cloud service before payment.
Checked 6 days agoOur synthesis2 evidence items

Current verdict

The transparent dual-PM reference

PurpleAir Zen is the defended PM-focused choice when dual-channel diagnostics, local card data and the PurpleAir ecosystem matter, provided its gas channel and crowd-map corrections are not overclaimed.

Checked 6 days agoOur synthesis13 evidence items
03

Other paths

The alternatives change what the PurpleAir Zen is worth

These are not generic competitors. Each one represents a different way to buy into the same market.

01lower upfront

Davis Instruments

AirLink

$235 current direct U.S. price
Best fit
fixed particulate and indoor-outdoor comparison
Tradeoff
The retained $235 covers standalone AirLink SKU 7210; it is not a complete weather station, has no CO2 or VOC, and WeatherLink account, network and any outdoor shelter or paired station remain separate
Open the source
02ownership

AirGradient

AirGradient ONE

$230 current fully assembled U.S. reference
Best fit
open-data and replaceable-sensor room monitoring
Tradeoff
The retained $230 is for the fully assembled indoor model; a USB-C cable is included, a wall adapter is not, and the free platform period, self-hosting choice, shipping, tax and sensor replacements remain separate decisions
Open the source
04

What changed

The product has a history

Older observations stay in the ledger when the current view changes. That lets a buyer tell the difference between an old complaint, an active issue, and a problem that was corrected.

  1. notable

    Current monitor evidence retained

    PurpleAir Zen was checked against current U.S. manufacturer identity and price, exact specification or manual, support and privacy terms, independent evaluation and bounded owner or operator evidence.

Price record

The price history starts here

Each amount stays tied to its source and capture date. Conflicting prices remain visible until the seller resolves them.

  1. $299 current direct U.S. price

    Current reference priceA structured timeline will begin with the next source capture

05

Owner experience

What repeats after the purchase

Owner and operator evidence is retained as a setup, response, data and service checklist for PurpleAir Zen, not an accuracy, reliability, health or safety rate.

Reports are self-selected and span different units, firmware, calibration, sites, pollutants, humidity, event sources, comparisons, networks, accounts and ages. They cannot prove reference accuracy, source identity, population reliability, exposure, health outcome, compliance or safety clearance.
SignalWhat owners reportOur readEvidence

A-B channel agreement, fan noise, Wi-Fi and map setup, microSD handling and correction choice

The manufacturer-hosted exact-model review set discusses setup, display, map and comparisons. It is self-selected and commercially hosted, so it cannot establish accuracy or reliability rates.

Set privacy and local-storage policy before installation, then trend both channels and investigate persistent divergence before using a corrected PM series

1 evidence record
06

Sources

Why we believe the current view

The page separates what a source states directly from what we conclude across sources.

01
PurpleAir Zen current manufacturer recordPurpleAir · identity

PurpleAir identifies PA-II-ZEN as an indoor display monitor with two replaceable optical PM channels, temperature, humidity, pressure and gas-resistance context plus PurpleAir map and optional microSD data.

Source type
manufacturer
Content hash
19201bba5f96b8ac…
Use
store excerpt
Open PurpleAir
02
PurpleAir Zen current U.S. pricePurpleAir · price

PurpleAir's current Zen page lists PA-II-ZEN at $299 and notes a possible fulfillment delay.

Source type
manufacturer
Content hash
724484bc014aa5ad…
Use
store snapshot
Open PurpleAir
03
PurpleAir Zen manual and measurement specificationPurpleAir · specification

The current model documentation supports the retained sensor suite, measurement ranges or disclosed absences, calibration and response, power, placement and operating boundaries.

Source type
support
Content hash
fbb4de3d56dc524b…
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store excerpt
Open PurpleAir
04
PurpleAir Zen current support and servicePurpleAir · specification

The dual PMS6003 sensors are user-replaceable, but replacement is not traceable calibration. Confirm warranty, current module availability, fan cleaning, firmware, cloud and API continuity and the operator responsible for A-B checks

Source type
support
Content hash
2f65abcfcd46954d…
Use
store excerpt
Open PurpleAir
05
PurpleAir Zen privacy and data termsPurpleAir · software

A public map setting can expose location and time series; private operation still uses account and service data unless local card collection is isolated. Confirm map precision, sharing, API keys, retention, deletion and ownership before installation

Source type
support
Content hash
229962a805cb3a28…
Use
store excerpt
Open PurpleAir
06
How to use air sensors and the Air Sensor GuidebookU.S. Environmental Protection Agency · specification

EPA separates lower-cost air-sensor information from regulatory monitoring and emphasizes study design, siting, quality checks, interpretation and communication of uncertainty.

Source type
support
Content hash
00774782ed9fbe35…
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Open U.S. Environmental Protection Agency
07
Improving your indoor environmentU.S. Environmental Protection Agency · specification

EPA places monitoring inside source control, ventilation, filtration and moisture-management decisions rather than treating a sensor reading as source identification, diagnosis or proof of safety.

Source type
support
Content hash
7db9daa987bfadbb…
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store excerpt
Open U.S. Environmental Protection Agency
08
Radon guidanceU.S. Environmental Protection Agency · specification

EPA radon guidance uses validated testing, named decision thresholds and mitigation follow-up; a short consumer display change is not a radon clearance result.

Source type
support
Content hash
75d4fad51cab5d99…
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store excerpt
Open U.S. Environmental Protection Agency
09
Carbon monoxide fact sheetU.S. Consumer Product Safety Commission · specification

CPSC guidance requires functioning carbon-monoxide alarms and emergency response to alarm or symptom conditions. A general air-quality monitor is not a substitute.

Source type
support
Content hash
cf427cddb9c401bc…
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store excerpt
Open U.S. Consumer Product Safety Commission
10
PurpleAir Flex and Zen long-term reviewBreatheSafeAir · specification

Independent long-term use examines Zen's dual-channel readings, map, local display and installation tradeoffs. Findings are bounded to the reviewed samples, locations and corrections.

Source type
editorial
Content hash
7ab7f40798557598…
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Open BreatheSafeAir
11
PurpleAir Zen owner reviewsPurpleAir customers · consensus

The manufacturer-hosted exact-model review set discusses setup, display, map and comparisons. It is self-selected and commercially hosted, so it cannot establish accuracy or reliability rates.

Source type
community
Content hash
5a355ca0e00fe630…
Use
store excerpt
Open PurpleAir customers
12
AirLink alternativeDavis Instruments · alternative

AirLink is the fixed particulate and indoor-outdoor comparison alternative at $235 current direct U.S. price.

Source type
manufacturer
Content hash
03a15837920d8cb9…
Use
store excerpt
Open Davis Instruments
13
AirGradient ONE alternativeAirGradient · alternative

AirGradient ONE is the open-data and replaceable-sensor room monitoring alternative at $230 current fully assembled U.S. reference.

Source type
manufacturer
Content hash
85d6c3f1491fc35a…
Use
store excerpt
Open AirGradient

Manufacturer identity, exact current U.S. price, specification or manual, support, independent evaluation and bounded owner or operator evidence were checked on August 18, 2026. This market covers current complete U.S.-supported indoor-air monitors for serious residential, school, office or building-owner use. It excludes smoke and carbon-monoxide life-safety alarms, basic single-purpose thermometers or hygrometers, sensors integrated into purifiers or dehumidifiers, HVAC controls, laboratory reference analyzers, professional handheld instruments, unsupported marketplace devices, cosmetic bundles and minor connectivity variants. Consumer low-cost sensors are not regulatory or laboratory reference methods. Optical PM estimates mass from scattered light and varies with aerosol, size distribution, humidity, inlet condition, correction and aging. Metal-oxide VOC, eTVOC and gas-index channels respond to mixtures, humidity and rolling baselines, may cross-react and cannot identify a source or specific compound; even a named low-cost formaldehyde channel needs interference and method scrutiny. NDIR CO2 can drift, and automatic baseline correction assumes periodic exposure near outdoor background. CO2 is an occupancy and ventilation clue, not proof of clean air, infection risk or safety. Radon decisions require the named averaging period and confirmation appropriate to EPA guidance. Site monitors in representative occupied air away from vents, windows, heat, direct sun, humidifiers and immediate sources unless testing that source. Nearby outdoor data adds context only when time, distance, weather and source differences are retained. No monitor identifies a source, diagnoses health, certifies ventilation or regulatory compliance, clears a space as safe, or replaces certified smoke and carbon-monoxide alarms. A monitor does not clean air, dehumidify a room or control HVAC unless a separate reviewed system does that work.

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