A traffic light, or seven sensors and an app
Do you want a glanceable light for one room, or a dataset for the whole home?
These sit at opposite ends of what 'air quality monitor' can mean — from a plug-in traffic light with no setup, to a whole-home sensor network that needs an account to function.
| Compared on | AIRCO2NTROL MINI | View Plus |
|---|---|---|
| Sensors | CO2, temperature | Radon, PM2.5, CO2, VOCs, humidity, temperature, pressure — 7 total |
| CO2 sensor technology | Not published | Not published |
| Display | On-device, alternating CO2/temperature + LED traffic light | Customisable e-ink screen |
| App / account required | No — standalone device | Yes, per Airthings |
| Connectivity | None (USB power only) | Wi-Fi |
| Power | Micro-USB, no battery | 6× AA batteries or USB; can act as a hub |
| Data logging / history | Not published (live reading only) | Yes, via the app |
| Price | ≈ 35 € | ≈ 230 € |
| Listed on amazon.com | No | Yes |
A tick marks the better answer on that line only. Counting ticks does not decide the page — the two verdicts below do, because these products answer different questions.
No amazon.com listing was found for this one. We hold references for other markets but none for the United States, so it may not be buyable here — which is the first thing to weigh against anything below.
Take the TFA Dostmann for a single room where a plug-in, glanceable ventilation cue is all you want — no app, no account, nothing to set up. It's one of the least expensive CO2 monitors we've checked.
Take the Airthings for whole-home monitoring over time, especially if radon and VOCs matter alongside CO2 and particulates — but budget for the app/account requirement and the highest price in this comparison.
No. Neither TFA Dostmann's listing for the AIRCO2NTROL Mini nor Airthings's listing for the View Plus states whether the CO2 sensor is NDIR or another technology — a gap shared by both, though other monitors in this family, like SwitchBot's Meter Pro CO2, do state NDIR explicitly.
Not fully. It has its own e-ink display for at-a-glance readings, but Airthings states an account and the app are required for the device to function — notifications, trend history and full sensor data all go through the app.
0–3000 ppm CO2 · LED traffic-light · USB powered
A pocket-sized, USB-powered CO2 display with a three-color LED traffic light (green/yellow/red) and an alternating CO2/temperature readout. No app, no Bluetooth, no battery to replace — just a plug-in monitor for a single room.
Best for: A single room where someone wants a plain go/no-go ventilation cue — a bedroom, home office, or classroom — without setting up an app.
7 sensors incl. radon & CO2 · Wi-Fi + app · battery powered
A seven-sensor Wi-Fi monitor covering radon, PM2.5, CO2, VOCs, humidity, temperature and air pressure, read through the Airthings app. Radon is sampled with a passive diffusion chamber and alpha-spectrometry detection; the unit runs on AA batteries or USB and can act as a hub for other Airthings devices.
Best for: Whole-home air monitoring where someone wants radon and VOC coverage alongside CO2 and particulates, and is comfortable running everything through the Airthings app.
≈ $330
Prices quoted in these summaries are dated readings. The live price is shown next to each product.
