INKBIRD IAM-T2 (Bluetooth version)

At a glance

• In its favour
• Plain fact
• Worth knowing
• Not stated by the maker

• In its favour: The Android app records nights while your phone listensNew: tested with simulated broadcasts so farOn iPhone, type the night’s high each morning.
• In its favour: Rechargeable; about 60 days a charge
• Plain fact: Self-calibration has a switch in its app
• Not stated by the maker: Altitude correction not stated
• Worth knowing: Get the Bluetooth version to connect it to a phone

With HouseExhale

The app looks at your bedroom’s CO₂ across the night and checks it against the 800 ppm goal. Here’s how this monitor’s nights get in.

Setting it up

1. Install the INKBIRD app from your phone’s app store.
2. Add your IAM-T2 and let it show CO₂.
3. Keep it plugged in overnight if you can.
4. Check the screen shows a CO₂ number.

The IAM-T2 shows CO₂, temperature and humidity on its screen.

Finding last night’s high

Open the IAM-T2 in the INKBIRD app and look at last night’s CO₂ history. Note the highest point while people were asleep.

Importing its export

1. Look for Export or Share in the INKBIRD app’s history screen.
2. Save it as a CSV and choose it here.

We haven’t confirmed a CSV export on a real IAM-T2 yet, so the app checks your file before saving.

Where to put it: about head height, at least 2 ft from anyone’s face, away from windows, doors and vents, and in the same spot every night. More on placement

Calibrating it

• Plain fact: Self-calibration has a switch in its appCan be turned on or off; the maker doesn’t say which it ships with (the Auto Calibration switch is in the INKBIRD app)

Look for CO₂ calibration in the INKBIRD app or the manual. Most true CO₂ (NDIR) monitors calibrate against outdoor air.

Outdoor air is about 425 ppm. Outside in the shade, a good monitor settles between about 400 and 450 within 15 to 30 minutes. Many monitors treat fresh air as 400, so 400 to 420 is normal. Can I trust my monitor?

Specs

Model

IAM-T2

Sensor and accuracy

True CO₂ (Sensirion sensor; model not named), ±(40 ppm + 5%)

Self-calibration

Can be turned on or off; the maker doesn’t say which it ships with (the Auto Calibration switch is in the INKBIRD app)

Corrects for altitude

Not stated by the maker

Also measures

Temperature and relative humidity

CO₂ range

0–9,999 ppm

How often it updates

Every 1, 2, 5 or 10 minutes; 1 minute by default

Power

Rechargeable over USB-C; about 60 days at one reading a minute

Screen

Backlit LCD

History

30 days on the monitor, synced to the INKBIRD app, which can export

App

INKBIRD app, for iPhone (iOS 12.0 or later) and Android (7.1 or later)

Exports a CSV

Documented; not yet confirmed on a real file

Connects by

Bluetooth 5.0 to the INKBIRD app; no Wi-Fi listed and no hub mentioned. The $59.99 non-Bluetooth version has no connection.

Alarm

Light and sound alert at CO₂ levels you set in the INKBIRD app. Default levels: good below 1,000 ppm, medium 1,000–1,400, unhealthy above 1,400. Buzzer options: off, sound once, or sound every time; the manual doesn’t say which it ships with.

Smart home

Home Assistant: the official INKBIRD integration lists the “Bluetooth 3-in-1 Indoor Air Quality Monitor IAM-T2”. The inkbird-ble library that integration uses reads CO₂, temperature and humidity from its broadcasts without connecting. INKBIRD’s page names no Alexa, Google, Apple or Matter support.

Size

111 × 66 × 21 mm (box: 178 × 105 × 36.5 mm)

Weight

185 g

Works in

Not stated by the maker

In the box

The monitor, a USB charging cable and a user manual

Warranty

1 year, against defects in parts or workmanship

Specs from the maker’s own pages, checked October 12 and October 17, 2026. “Not stated by the maker” means no maker page we could open says.

Turning ventilation up

Home Assistant’s INKBIRD integration lists the IAM-T2, and the library it uses reads CO₂ from its Bluetooth broadcasts, with no cloud. We haven’t seen it work on a real IAM-T2 yet. Home Assistant: INKBIRD integration

With a smart-home relay on a ventilator’s high-speed input, once you’ve confirmed Home Assistant shows its CO₂, that reading can turn an HRV or ERV up at 750 ppm and back down at 650. Ventilator makers don’t document this, so check your unit’s manual first, and keep to low-voltage inputs.

CO₂ controls · Make the system you have turn up by itself

Before you buy

• Worth knowing: Get the Bluetooth version to connect it to a phone
• Plain fact: About $70–$80 before tax and shipping$69.99 on sale, $79.99 regular, at INKBIRD’s US store. The $59.99 version without Bluetooth can’t connect to a phone.
• Plain fact: New in the Android appTested with simulated broadcasts, not yet with a real monitor overnight.

About $70–$80, checked October 2026. Prices change often; we checked at the maker’s store and large US retailers. Any monitor that measures true CO₂ works with HouseExhale, and one is enough: move it between rooms.

INKBIRD IAM-T2 (Bluetooth version) at INKBIRD (opens in a new tab)

Compare it

The monitors closest to it in price.

• 

  Qingping CO₂ & Temp & RH Monitor

  About $70

  Rechargeable, with 24-hour and 30-day graphs in the Qingping IoT app. Plug it in overnight so it updates often.

• 

  Qingping Air Monitor Lite

  About $76–$90

  A Qingping with a color screen that also measures particles. Its battery lasts hours, so keep it plugged in.

Compare the three side by side