kolosAQ + KOLOS for Mac

Know your air.
Room by room.

Indoor air sensing.
Right on your Mac.

Air-quality index, temperature, humidity and pressure. Know what’s changing—and use those readings to make your ventilation respond.

INDOOR AIR QUALITY72 IAQ

Let ventilation follow your air.

€49 per sensor. Save with packs.

Buy kolosAQ Try ventilation control

THE SENSOR + THE APP

Hammond 1551V13WH white enclosure, closed exterior — manufacturer photograph — White · 1551V13WH

KOLOS for Mac three-column interface: devices, sensor details and history; edited screenshot with sample kolosControl64 entry

Bluetooth. Battery-powered. Built for Mac.

TemperatureHumidityAir-quality indexPressure

Four measurements. One dashboard.

Get to know your indoor air.

Add a kolosAQ sensor to each room you want to follow. See readings together in KOLOS for Mac, with clear graphs that reveal changes over time.

A new reading every five minutes. Room names you choose. Your measurement history stored locally on your Mac.

Temperature

See how warmth changes from room to room.

Humidity

Follow the moisture in your indoor air.

≈

Air-quality index

Understand trends in a gas-derived indoor air-quality index.

↕

Pressure

Track absolute atmospheric pressure over time.

Your companion app

Every room.
One Mac app.

Your rooms, named by you.
Your readings, all together.
Your history, kept on your Mac.

⌘

At home in your menu bar.

Choose Nearest and your menu-bar reading follows the nearby sensor as you move with your Mac. Prefer one room? Pin its sensor. Or keep an eye on the highest IAQ reading.

Nearest uses Bluetooth signal strength. It estimates proximity, not exact room location. Readings reflect the latest sync.

↗

From a reading to a pattern.

Clear graphs give context to each measurement. See detailed history for up to 30 days, with hourly summaries for up to a year, subject to storage limits.

From sensing to control

Better air starts with a response.

Turn ventilation up when air quality declines, and ease it back down as it improves. Pair kolosAQ with kolosDrive12 for ventilation servos or kolosControl64 for analog speed control. Your script defines the response; the controller runs it locally.

Explore kolosDrive12 ↗

TRY IT · TWO READINGS. ONE RESPONSE.

Let the room
set the pace.

Air quality or humidity: either can turn ventilation up. Move the sliders and see this simple logic in action.

Explore analog ventilation control ↗

THE SCRIPT BEHIND THE DEMOON SAMPLE

ON SAMPLE(room)
BEGIN
  speed := 20.0;
  airQualitySpeed := 20.0 + (room.iaq - 100.0);
  humiditySpeed := 20.0 + (room.humidity - 60.0) * 4.0;

  IF airQualitySpeed > speed THEN speed := airQualitySpeed;
  IF humiditySpeed > speed THEN speed := humiditySpeed;
  IF speed > 100.0 THEN speed := 100.0;

  ventilation := speed;
END;

Speed is a percentage. Either reading can increase it; the higher demand wins.

Air-quality index 72 IAQ

0Boost above 100300 IAQ

Each IAQ point above 100 adds 1% fan speed.

Humidity 45%

20%Boost above 60%90%

Each humidity point above 60% adds 4% fan speed.

Start at 20%. Use the higher demand. Stop at 100%.

IAQ > 100ORHumidity > 60%

VENTILATION SPEED20%Everyday airflow

Both readings are below their boost thresholds. Ventilation stays at 20%.

Direct Bluetooth connection

Sensor. Bluetooth. Mac.
Simple by design.

kolosAQ connects directly over Bluetooth. Your measurement history lives locally on your Mac. No cloud account. No gateway. No subscription.

kolosAQBluetoothKOLOS
for Mac

How it works

Get connected in three steps.

01
Give a room a sensor.
Power kolosAQ with two AA batteries and mount it on the ceiling in the room you want to understand.
02
Make the introduction.
Pair from KOLOS for Mac using the sensor’s PIN. Give it a room name that feels like home.
03
Let the story build.
Your awake Mac syncs nearby sensors about every five minutes. Open the dashboard for graphs or glance at the menu bar.

Updates, without a cable.

Install firmware wirelessly from KOLOS for Mac when you choose. The app keeps history already downloaded to your Mac.

Fits into your home

Small on the ceiling.
Useful every day.

No power cable to route.
No gateway to find a home for.
Just a sensor, two AA batteries,
and your Mac.

AI-generated home office with a white round sensor mounted flush to the ceiling, based on the Hammond 1551V13WH enclosure

01 — The bedroom

See the overnight story.

Look back at temperature and humidity changes while you were asleep.

02 — The home office

Keep your room in view.

Glance at the air-quality index in your Mac menu bar while you work.

03 — The living room

Notice the everyday changes.

Explore how your readings shift through a room’s daily routine.

The details

The sensor,
in detail.

Room sensing in your choice of white, grey or black. Battery-powered, with a direct Bluetooth connection to your Mac.

Measurements: Temperature, relative humidity, static indoor air-quality index and absolute pressure
Colours: Available in white, grey and black.
White: 1551V13WH · Grey: 1551V13GY · Black: 1551V13BK
Placement: Designed for ceiling mounting. The enclosure can also be placed on a shelf or mounted on a wall.
Sensing hardware: Bosch BME690
Reading interval: Every 5 minutes
Connection: Bluetooth · direct to Mac
One connected Mac per sensor at a time
Power: 2 × AA batteries
Alkaline or Energizer L91
Sensor history: About 24 hours of detailed readings; hourly summaries covering about 3 days total. Sensor history clears on power loss or firmware update.
Mac history: Detailed readings up to 30 days; hourly summaries up to 365 days.
Companion: KOLOS for Mac · room names, graphs, menu-bar readings and manual wireless firmware updates

Useful to know

Good questions.

What does the air-quality index measure?

kolosAQ uses the BME690 and Bosch processing to produce a gas-derived static indoor air-quality index, suited to a sensor kept in a room. It needs time to calibrate; KOLOS shows calibration status. It does not measure CO₂, particulate matter or carbon monoxide, and it is not a safety alarm.

Does it need Wi-Fi, a gateway or an account?

No. The sensor connects directly to KOLOS for Mac over Bluetooth. Normal operation is local, without a cloud account or subscription.

How does the nearest-sensor reading work?

KOLOS estimates which known sensor is nearest using Bluetooth signal strength. Walls and radio conditions can affect the selection, so it is not guaranteed room positioning. You can also pin a sensor or select the highest IAQ reading. The menu bar shows synchronized readings, not an instant measurement on every move.

What happens when my Mac is asleep or away?

The sensor continues taking readings using its batteries. Normal Mac synchronization stops during sleep or when KOLOS is quit. On reconnection, KOLOS downloads available missing history. The sensor has limited memory: about 24 hours in detail and hourly summaries spanning about three days total. Power loss or a firmware update clears sensor memory; history already downloaded to the Mac remains.

How long do the batteries last?

Battery life varies with the batteries and usage. KOLOS for Mac shows a low-battery indicator and sends a notification when it is time to replace them.

How much does kolosAQ cost?

€49 per sensor. Choose white, grey or black.

Know your air.Room by room.