AirGradient · Updated October 2026
AirGradient ONE (I-9PSL): price & specs
AirGradient ONE (I-9PSL). Every price and spec below is linked to its source and dated — no guesses.
Source: airgradient.com verified ✓ corroborated verify in ledger
Seen at
- airgradient.com$230read
Each figure is what that seller's own page published on the day we read it — not our price of record, and not a live quote. Follow the link for what it costs right now.
- Best for Accurate, high-quality sensors (NDIR CO2, Plantower PM, Sensirion NOx/VOC); Beautifully designed physical unit with clear at-a-glance LED bar and screen.
- Skip if Limited smart-home integration; no native Alexa or Google Home as of Sept 2025 is a dealbreaker.
Is the AirGradient ONE (I-9PSL) a good buy?
At $230, the AirGradient ONE (I-9PSL) is #14 cheapest of the 18 air quality monitors we track, where the median is $169.
Evidence of Record
Our data- Independent labsmeasured it
- 1
- Physical metricsrecorded
- 1
- Outlets on recordall tested
- 1
One independent lab measured this product across 1 physical metric — in-home co2 during. These numbers rest on a single hands-on source so far.
Review consensus · sourced & dated
What reviewers say about the AirGradient ONE (I-9PSL)
Only one whitelisted tester offers a live, hands-on review: NYT Wirecutter names the AirGradient One its Top Pick, praising its high-quality sensors (NDIR CO2, Plantower PM, Sensirion NOx/VOC), its clear at-a-glance display, and a best-in-class web dashboard for tracking pollutants over time. The main knock is limited smart-home integration (no native Alexa or Google Home as of Sept 2025). No lab accuracy benchmarks were published; the one measured figure is an in-home device reading during Wirecutter's 24-hour test.
Based on 1 review · 1 lab-tested · 2025-10-01
Tested by Wirecutter
Consistently praised
- Accurate, high-quality sensors (NDIR CO2, Plantower PM, Sensirion NOx/VOC)
- Beautifully designed physical unit with clear at-a-glance LED bar and screen
- Excellent, informative web/app dashboard for tracking pollutants over time
- Tracks six common indoor pollutants including NOx, relevant to gas-appliance homes
Commonly flagged
- Limited smart-home integration; no native Alexa or Google Home as of Sept 2025
- Detailed readout may be overkill for users not tracking a specific concern
Where reviewers disagree Only one live whitelisted review (NYT Wirecutter) could be sourced and verified, so no cross-source comparison is possible.
The sources (1)
In-home CO2 during 24-hr hands-on test, windows open (device reading): about 500 ppm
The category has been evolving rapidly, though, and we have finally found a genuinely worthwhile monitor: the AirGradient One.
AirGradient’s tracking is the clearest and most accessible I have come across.
But smart-home integrations are limited.
Specifications
| Price (US) | $230 Official AirGradient page lists "USD 230.00" for the fully assembled AirGradient ONE (Model I-9PSL); the kit version is "USD 138.00". breathesafeair.com review corroborates "$138 vs $230" ($138 DIY kit / $230 assembled). The listed price is for the fully assembled named model. |
|---|---|
| Brand | AirGradient |
| Released | — |
| Pm25 sensor | Yes |
| CO₂ sensor | Yes |
| Voc sensor | Yes |
| Radon sensor | No |
| Display screen | OLED, 1.3 in, 128x64 px |
| App connectivity | Yes |
| Power | USB-C plug-in; requires >2A 5V USB power plug (not included) |
Source: airgradient.com (read 2026-10-16) · corroborated by breathesafeair.com (read 2026-07-10).
How we checked
The official AirGradient indoor page's Technical Data table confirms the exact model "I-9PSL (AirGradient ONE, 9th Generation)" with SenseAir S8/S88 NDIR CO2, Plantower PMS5003 PM2.5, Sensirion SGP41 TVOC/NOx and SHT40 temp/humidity sensors, a "OLED display 1.3 inch (I2C 128x64px)", 2.4 GHz WiFi, and power via USB-C requiring a ">2A 5V USB A Power Plug" (not included); it lists the fully assembled unit at "USD 230.00" (kit "USD 138.00"). No radon sensor is present (the full sensor list is enumerated on both pages). The breathesafeair.com review (published 24 Nov 2025, updated 27 Apr 2026) corroborates the same sensor lineup, the 1.3-inch OLED display, WiFi connectivity, and pricing ("$138 vs $230"), and independently confirms the model identity by referencing the "I-9PSL-DE" dashboard hardware selection. No explicit calendar release year is stated on either page, so release date and release year are left blank.
Is the AirGradient ONE (I-9PSL) worth it vs cheaper air quality monitors?
AirGradient ONE (I-9PSL) against its closest cheaper and pricier air quality monitors on the specs that matter — every value sourced. See all 18 ranked
| Product | Price | Pm25 sensor | CO₂ sensor | Voc sensor | Radon sensor | Display screen |
|---|---|---|---|---|---|---|
| AirGradient ONE (I-9PSL) this | $230 | Yes | Yes | Yes | No | OLED, 1.3 in, 128x64 px |
| Airthings Wave Plus | $229 | No | Yes | Yes | Yes | LED glow ring (red/yellow/green), no numeric screen |
| Airthings View Plus | $299 | Yes | Yes | Yes | Yes | 2.9 in ePaper, 296x128 px |
Frequently asked questions
What do reviewers say about the AirGradient ONE (I-9PSL)?
Only one whitelisted tester offers a live, hands-on review: NYT Wirecutter names the AirGradient One its Top Pick, praising its high-quality sensors (NDIR CO2, Plantower PM, Sensirion NOx/VOC), its clear at-a-glance display, and a best-in-class web dashboard for tracking pollutants over time. The main knock is limited smart-home integration (no native Alexa or Google Home as of Sept 2025). No lab accuracy benchmarks were published; the one measured figure is an in-home device reading during Wirecutter's 24-hour test. Praised: Accurate, high-quality sensors (NDIR CO2, Plantower PM, Sensirion NOx/VOC); Beautifully designed physical unit with clear at-a-glance LED bar and screen; Excellent, informative web/app dashboard for tracking pollutants over time; Tracks six common indoor pollutants including NOx, relevant to gas-appliance homes. Flagged: Limited smart-home integration; no native Alexa or Google Home as of Sept 2025; Detailed readout may be overkill for users not tracking a specific concern. (From 1 tester review, 1 lab-tested.)
How much does the AirGradient ONE (I-9PSL) cost?
The AirGradient ONE (I-9PSL) has a US price of $230 (Official AirGradient page lists "USD 230.00" for the fully assembled AirGradient ONE (Model I-9PSL); the kit version is "USD 138.00". breathesafeair.com review corroborates "$138 vs $230" ($138 DIY kit / $230 assembled). The listed price is for the fully assembled named model.), as of 2026-10-16.
How does the AirGradient ONE (I-9PSL) compare on price?
At $230, the AirGradient ONE (I-9PSL) is #14 cheapest of the 18 air quality monitors we track, where the median is $169.
What are the AirGradient ONE (I-9PSL)'s key specs?
AirGradient ONE (I-9PSL) (AirGradient): Pm25 sensor, CO₂ sensor, Voc sensor, Display screen OLED, 1.3 in, 128x64 px, App connectivity. Full sourced spec sheet verified 2026-10-16.
Price of record: $230 at airgradient.com, 2026-10-16. Other retailers may be lower — check the current price:
See AirGradient ONE (I-9PSL) on Amazon As an Amazon Associate we earn from qualifying purchases.Similar air quality monitors
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