IKEA
IKEA ALPSTUGA Air Quality Sensor
- Thread
- Matter
Verified September 2026
A genuine CO2 plus PM2.5 monitor for £25 is unheard of — under half the SwitchBot Meter Pro CO2's £60 and a sixth of the Aranet4's £169, and IKEA's collaboration with Sensirion (the same sensor maker behind SwitchBot's chip) suggests this isn't a budget knock-off sensor, just a budget price. It speaks Matter over Thread, so it drops straight into HA's Matter integration with no IKEA hub needed if you already have a Thread border router. At a compact 40 x 40 x 90mm it suits a shelf or windowsill; keep it clear of doors, vents and direct sun. Sells out fast at IKEA UK.
In Home Assistant
| Control | Type | What it does |
|---|---|---|
| CO2 | Sensor (ppm) | Sensirion CO2 reading, exposed as its own entity via Matter's Air Quality cluster — not folded into a single AQI score. |
| PM2.5 | Sensor (µg/m³) | Fine particulate concentration, exposed as an independent entity from the same Sensirion module. |
| Temperature | Sensor | Ambient temperature reading via the standard Matter Temperature Measurement cluster. |
| Humidity | Sensor (%) | Relative humidity reading via the standard Matter Humidity cluster. |
| Air quality | Sensor | Device-calculated summary index derived from CO2 and PM2.5, useful for a single-glance state but not a substitute for the individual sensors in automations. |
Matter's Air Quality cluster exposes ALPSTUGA's readings as separate sensor entities, not one lumped index — CO2, PM2.5, temperature and humidity all land as individual sensors alongside a general air-quality summary state, so automations can gate on CO2 alone rather than a blended score. Thread commissioning is the rough edge: several users needed to sync credentials via the phone's Thread Companion App rather than the Thread integration's own send-credentials button, and needed IPv6 forwarding enabled on the router before pairing succeeded. HA has no native Matter time-sync, so the onboard clock can drift or reset on power loss since the device has no backup battery. A solid automation: trigger a connected extractor fan or purifier when the CO2 sensor crosses roughly 1000ppm, with a stabilisation delay so it doesn't flap on transient spikes from someone walking past.
Specs
- power
- USB-C mains
- display
- LED display with clock mode
- requires
- Thread border router (DIRIGERA, HA Connect ZBT-1/ZBT-2, Apple TV etc.)
- materials
- ABS plastic
- dimensions
- 40 x 40 x 90mm, approx. 90g
- sensor type
- Air quality (CO2, PM2.5, temperature, humidity) — Sensirion sensor
- co2 pm25 accuracy
- Not published by IKEA (unlike SwitchBot/Aranet4, who both quote NDIR accuracy specs)