AirGradient · Updated July 2026

AirGradient ONE (I-9PSL): price & specs

See AirGradient ONE (I-9PSL) on Amazon Recorded 2026-07-10 — live price may differ. As an Amazon Associate we earn from qualifying purchases.

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.

AirGradient ONE (I-9PSL). Every price and spec below is linked to its source and dated — no guesses.

Source: airgradient.com verified 2026-07-10 ✓ corroborated verify in ledger

AirGradient ONE (I-9PSL) — AirGradient — Image: breathesafeair.com (© AirGradient)

Is the AirGradient ONE (I-9PSL) a good buy?

At $230, the AirGradient ONE (I-9PSL) is #12 cheapest of the 17 air quality monitors we track, where the median is $189.

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.

A coverage record, not a rating. How we count

Review consensus · sourced & dated

What reviewers say about the AirGradient ONE (I-9PSL)

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)

Wirecutter (NYT) lab-tested · 2025-10-01

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). priceUsd reflects 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 (verified 2026-07-10) · corroborated by breathesafeair.com. 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 releaseDate and release_year are left null.

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 17 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
Atmotube PRO 2	$249	Yes	Yes	Yes	No	No screen - front LED (Air Quality Score color indicator)

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). priceUsd reflects the fully assembled named model.), as of 2026-07-10.

How does the AirGradient ONE (I-9PSL) compare on price?

At $230, the AirGradient ONE (I-9PSL) is #12 cheapest of the 17 air quality monitors we track, where the median is $189.

What are the AirGradient ONE (I-9PSL)'s key specs?

AirGradient ONE (I-9PSL) (AirGradient): pm25 sensor Yes, co2 sensor Yes, voc sensor Yes, radon sensor No, display screen OLED, 1.3 in, 128x64 px. Full sourced spec sheet verified 2026-07-10.