Accurate Air Quality Monitoring for a Healthier Home
Keep your indoor environment safe and comfortable with this advanced 3-in-1 air quality monitor. Equipped with a professional NDIR carbon dioxide sensor, it delivers precise CO2 readings in just 1.5 seconds, helping you track the air you breathe. Alongside CO2 levels, it measures temperature and humidity in real time, giving you a complete picture of your indoor air quality. Whether you’re at home, in the office, or any indoor space, this compact and portable device helps you maintain the freshest air possible.
The easy-to-read LCD screen clearly displays vital data along with intuitive facial icons that indicate air quality from healthy to unhealthy. This feature gently reminds you when it’s time to open a window or adjust ventilation, ensuring you always live in the most comfortable and safe atmosphere.
Key Features
- Fast and Accurate CO2 Detection – Uses NDIR infrared sensor for professional precision with a sampling time of just 1.5 seconds
- 3-in-1 Air Quality Monitoring – Measures carbon dioxide concentration, temperature (from -10°F to 122°F), and humidity (20%–85% RH)
- Adjustable Alarm Settings – Set CO2 alarm thresholds between 800 and 2000 ppm; audible alarm sounds immediately when exceeded
- Clear LCD Display – Shows real-time data and air quality icons for quick understanding
- USB Rechargeable Battery – Built-in 1600mAh lithium battery offers up to 24 hours of use per charge, rechargeable via USB cable
- Portable and User-Friendly – No app or Wi-Fi needed, simple setup with double-click button control
When to Use This Monitor
This air quality monitor is ideal for anyone looking to improve indoor air safety and comfort. Use it at home, in classrooms, offices, or small commercial spaces to monitor ventilation efficiency, track CO2 buildup, and manage humidity and temperature. It’s especially helpful during cold seasons when windows remain closed, or in areas prone to poor air circulation.
What Makes This Device Special
Unlike basic CO2 detectors, this device offers a complete 3-in-1 solution combining CO2 detection with temperature and humidity monitoring, providing a full environmental snapshot at a glance. Its fast response time and customizable alarm settings let you react quickly to poor air quality, while the USB rechargeable battery ensures convenience and portability. The simple design with facial icons makes it accessible for all users, making healthy indoor air easy to manage every day.
Take control of your indoor air quality and breathe easier with this reliable and easy-to-use air quality monitor. Order yours today and create a healthier environment for you and your loved ones.
SHIPPING
We are proud to offer international shipping services that currently operate in over 200 countries and islands world wide. Nothing means more to us than bringing our customers great value and service. We will continue to grow to meet the needs of all our customers, delivering a service beyond all expectation anywhere in the world.
Do you ship worldwide?
Yes. We provide free shipping to over 200 countries around the world. However, there are some locations we are unable to ship to. If you happen to be located in one of those countries we will contact you.
What about customs?
We are not responsible for any custom fees once the items have been shipped. By purchasing our products, you consent that one or more packages may be shipped to you and may get custom fees when they arrive to your country.
How long does shipping take?
Shipping time varies by location. These are our estimates:| Location | *Estimated Shipping Time |
|---|---|
| United States | 5-20 Business days |
| Canada, Europe | 5-20 Business days |
| Australia, New Zealand | 5-20 Business days |
| Central & South America | 5-25 Business days |
| Asia | 5-20 Business days |
| Africa | 5-25 Business days |
Do you provide tracking information?
Yes, you will receive an email once your order ships that contains your tracking information. If you haven’t received tracking info within 5 days, please contact us.
My tracking says “no information available at the moment”.
For some shipping companies, it takes 2-5 business days for the tracking information to update on the system. If your order was placed more than 5 business days ago and there is still no information on your tracking number, please contact us.
Will my items be sent in one package?
For logistical reasons, items in the same purchase will sometimes be sent in separate packages, even if you've specified combined shipping.
If you have any other questions, please contact us and we will do our best to help you out.
RETURNS
Order cancellation
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Refunds
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
- If you did not receive the product within the guaranteed time (45 days not including 1-3 day processing) you can request a refund or a reshipment.
- If you received the wrong item you can request a refund or a reshipment.
- If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.
We do not issue the refund if:
- Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
- Your order did not arrive due to exceptional circumstances outside the control of legasen.com (i.e. not cleared by customs, delayed by a natural disaster).
- Other exceptional circumstances outside the control of legasen.com.
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
Exchanges
If for any reason you would like to exchange your product, perhaps for a different size in clothing, you must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
Order cancellation
All orders can be cancelled until they are shipped. If your order has been paid and you need to make a change or cancel an order, you must contact us within 12 hours. Once the packaging and shipping process has started, it can no longer be cancelled.
Refunds
Your satisfaction is our #1 priority. Therefore, you can request a refund or reshipment for ordered products if:
- If you did not receive the product within the guaranteed time( 45 days not including 2-5 day processing) you can request a refund or a reshipment.
- If you received the wrong item you can request a refund or a reshipment.
- If you do not want the product you’ve received you may request a refund but you must return the item at your expense and the item must be unused.
We do not issue the refund if:
- Your order did not arrive due to factors within your control (i.e. providing the wrong shipping address)
- Your order did not arrive due to exceptional circumstances outside the control of legasen.com (i.e. not cleared by customs, delayed by a natural disaster).
- Other exceptional circumstances outside the control of https://legasen.com
*You can submit refund requests within 15 days after the guaranteed period for delivery (45 days) has expired. You can do it by sending a message on Contact Us page
If you are approved for a refund, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 14 days.
Exchanges
If for any reason you would like to exchange your product, perhaps for a different size in clothing. You must contact us first and we will guide you through the steps.
Please do not send your purchase back to us unless we authorise you to do so.
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