Knowing when to let fresh air in
CO₂ rises in occupied rooms with little ventilation. A reading gives you a simple cue to open a window or a door, rather than waiting for a room to feel stuffy.
About Atmosense
Helping you understand the air at home.
Atmosense is a small UK business based in Birmingham. We help people get a clearer picture of the conditions in the rooms where they live and work, with straightforward information and friendly support from real people.
Why it's worth knowing
Indoor conditions change more than you'd think.
We spend much of our day indoors, and the air in a room is always changing. It shifts with how many people are in it, whether the windows are open, cooking, showers, drying laundry, and the weather outside.
Most of these changes are hard to notice. You can't see carbon dioxide build up, and it's difficult to judge humidity by feel. An indoor monitor turns them into simple readings, so you can make small, practical choices with a bit more confidence.
Keeping an eye on moisture
Humidity that stays high can lead to condensation and damp. Seeing the number helps you decide when to run an extractor fan or air a room.
Understanding comfort
Temperature changes through the day and from room to room. Readings help you understand where and when your home feels too warm or too cool.
A monitor doesn't change the air by itself. It gives you information, and the small steps you take are what make the difference.
Our approach
Simple, honest and easy to live with.
We focus on the readings that are most useful day-to-day: carbon dioxide, temperature and humidity. Our monitor shows them clearly on its screen and on your phone, without anything you don't need.
We're careful to say what it does and doesn't measure, so you know exactly what to expect before you buy. No jargon, no exaggerated promises.
What you can expect from us
Looking after you, before and after your order.
- Real people in the UKEmail us with any question about setup, readings, or your order. We usually reply within one working day.
- Free UK deliveryOrders are dispatched within 1 to 2 working days and tracked to your door. Delivery
- 30-day returnsChanged your mind? You have 30 days from delivery to return it. Returns & refunds
- 2-year warrantyIf your monitor develops a fault, we'll put it right. 2-Year Warranty
Explore more
Find out more about Atmosense.
Technology
Our Core monitor tracks carbon dioxide (CO₂), temperature, and humidity in the room, and shows the readings clearly on its screen and in the app on your phone, so you can see when to let fresh air in.
Satisfaction guarantee
If your monitor isn't right for you, you have 30 days from delivery to return it for a refund, and it's covered by our 2-year warranty.
Help & support
Whether you're a new customer with questions or an existing one who needs a hand, we're always here. Just an email away - real people in the UK, ready to help.
Our monitor measures carbon dioxide (CO₂), temperature and humidity. It is not a medical device, and it is not a carbon monoxide alarm. If you have fuel-burning appliances at home, fit a certified carbon monoxide alarm.