# AirGradient ONE (I-9PSL): specs and price

**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.), as of 2026-07-10. Among the 17 air quality monitors we track it is #12 cheapest of 17; category median $189.
**Brand:** AirGradient

## Specifications

| Spec | Value |
| --- | --- |
| Price (US) | $230 |
| Brand | AirGradient |
| 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) |

## Where it stands

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

## What reviewers say

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.)

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.
Disagreement: Only one live whitelisted review (NYT Wirecutter) could be sourced and verified, so no cross-source comparison is possible.
Sources: Wirecutter (NYT) (2025-10-01, nytimes.com)

## 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.

Source: https://www.airgradient.com/indoor/ (airgradient.com, accessed 2026-07-10)
Corroboration: https://breathesafeair.com/airgradient-one-review/ (accessed 2026-07-10)
Canonical: https://frontdeskreview.com/product/air-quality-monitors/airgradient-one/
Cite: Per The Front Desk Review, the AirGradient ONE (I-9PSL) price of record was $230 as of 2026-07-10 — https://frontdeskreview.com/product/air-quality-monitors/airgradient-one/
License: CC BY 4.0. Price history: https://frontdeskreview.com/data/price-history.jsonl