---
product_id: 656491585
title: "CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor"
brand: "u unni"
price: "658 kr"
currency: DKK
in_stock: true
reviews_count: 8
category: "U Unni"
url: https://www.desertcart.dk/products/656491585-co2-monitor-carbon-dioxide-detector-for-home-3-adjustable-volume
store_origin: DK
region: Denmark
---

# CO2 range 400–5000 ppm ±5%+50ppm 3-level adjustable alarm volume Temp range 14.2°F–122°F CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor

**Brand:** u unni
**Price:** 658 kr
**Availability:** ✅ In Stock

## Summary

> 🌬️ Breathe smarter, live better — your air’s new best friend!

## Quick Answers

- **What is this?** CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor by u unni
- **How much does it cost?** 658 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/656491585-co2-monitor-carbon-dioxide-detector-for-home-3-adjustable-volume)

## Best For

- u unni enthusiasts

## Why This Product

- Trusted u unni brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Dual Power Flexibility:** USB powered with battery backup ensures continuous monitoring—never miss a critical alert.
- • **Sleek, User-Friendly Design:** Clear, colorful display with easy calibration and mounting options for seamless integration into your smart home.
- • **Real-Time Air Quality Insights:** Monitor CO2 spikes, VOCs, and particulate matter instantly to know exactly when to ventilate.
- • **Customizable Alerts & Backlight:** Set 3 volume levels and 3 backlight brightness modes to fit your lifestyle and environment.
- • **Precision Swiss Photoacoustic Sensor:** Experience ultra-accurate CO2, temperature, and humidity readings for total indoor air confidence.

## Overview

The U UNNI CO2 Monitor uses a high-precision Swiss photoacoustic sensor to deliver real-time, reliable readings of carbon dioxide (400–5000 ppm), temperature (14.2°F–122°F), and humidity (20%–95%). Featuring 3 adjustable alarm volumes and backlight settings, it alerts you to poor indoor air quality, helping prevent headaches and fatigue caused by elevated CO2. USB powered with battery backup, it’s perfect for homes, offices, and RVs, combining advanced air quality monitoring with sleek, user-friendly design.

## Description

U UNNI CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor: desertcart.com: Tools & Home Improvement

Review: UNNI Air quality monitor UN0602 appears accurate - Comparing to UN0601 - The Unni carbon dioxide monitor UN0601 is small and light and seems very accurate. The display is clear and easy to read and can be dimmed or turned off. It comes with a USB cord that plugs in to any charger. Batteries can be used for memory or temporary testing, but are not necessary for the unit to function. To test the accuracy, I placed it outdoors and it was reading 401 ppm, which is normal carbon dioxide level in outdoor air. Indoor it was reading 568 ppm and it was going up when there were more people in the room and with some candles lit. The level went down to 489 ppm in the same room overnight when there were no people or lit candles. The monitor also has a thermometer and humidity function. I tested it side-by-side with a UNNI thermometer and it displayed the same temperature and humidity digits as the other unit, with only a fraction difference. The temperature can be set to Fahrenheit or Celsius. The monitor has an alarm feature that can be set if the CO2 level becomes too high. I tested by blowing on it and it went up to over 1000 ppm and a window symbol was lit on the display, indicating it is time to ventilate the room. This carbon dioxide monitor appears to work great and can be used in places where people gather, such as in schools, churches or similar, but also in your home. EDIT: This is a review of Unni Air Quality Monitor UN0602. There is a USB power cable and adapter included in the box along with instructions. When you first plug it in, there is a few minutes of count down before the display starts to show any values. The calendar and clock is easy to set and there is an option for 12 hour or 24 hour format, and daylight savings time. The unit monitors CO2 in the air, expressed in parts per million (ppm). The outdoor air is typically around 400 ppm for normal clean air. CO2 values over 1000 is too high and ventilation is needed. I tested the device side by side with an older same brand CO2 monitor UN0601 and found that the values were close, but not in agreement until after one week of testing. There was a 60-100 ppm difference in the values, sometimes the old unit was lower and the new unit higher, and sometimes it was the other way around. I tested both of them outdoors and noted the value was close to 400 ppm for each. The CO2 reading can be calibrated if it seems off. I did not calibrate it, since the outdoor reading seemed accurate. After a week the old and the new monitor were displaying the same CO2 values. The CO2 monitor is using a photo acoustic sensor. The unit also monitors the total Volatile Organic Compounds (TVOC) and is displayed with five different color indicators, green being the lowest and purple the highest level. The monitor was mostly green during testing, but would quickly go to purple within an hour when cooking. Just boiling a pot of pasta on an electric stove, caused the monitor to show a purple indicator even if it was in an other room. I am more interested in VOCs from paint, flooring, furniture etc. in the home, so this can be a little misleading. The particulate matter (PM) measures pollutants smaller than 1 microns (PM1) or fine, measured in micrograms per cubic meter, smaller than 2.5 microns (PM2.5), and smaller than 10 microns (PM10), or coarse. These smaller particles are invisible, like soot, viruses, smoke etc. and can cause asthma and other health issues. Values below 75 are generally considered safe. All three PM values were showing the same numbers during testing, from 0-5. The values seemed to go up at the same time when the TVOC value was going up. Both TVOC concentration value and the PM values are measured with laser detection. Not sure how accurate they are. The ambient temperature and humidity is also measured and displayed. These values seem accurate, since I compared them to several other devices. The Unni air quality monitor also has alert functions that can be set for CO2 and PM levels. The alerts can be turned on/off. The backlight on the display has two brightness levels and can be turned off by touching the upper part. This monitor can be useful after home renovations or when moving into new places with unknown materials. It can also be useful if living in areas with suspected high air pollution.
Review: Very Handy Air Quality Monitor! - We just purchased the Unni Air Quality Monitor for our home and fell in love with it right out of the box! It was very easy to set up. There is a nice instruction book that comes with it. The one thing missing in the manual is an explanation of the air quality acronym meanings. I had to look up their definitions. The display is clean, and colorful and very easy to read. Not only do you see current CO2 (carbon dioxide) levels, TVOC level (Total Volatile Organic Compounds, representing the combined concentration of many different organic chemicals that easily turn into gas at room temperature, used as a key indicator of indoor air quality level), and PM2.5 and PM10 levels (particulate matter in sizes 10 microns and smaller and 2.5 microns and smaller). You can set alarms for these values too. In addition to the numeric values, it also gives you readings of very good”, “good”, “normal”, “bad”, “very bad”. Bonus data displayed is indoor temperature and humidity as well as a calendar! Poor air quality could lead to headaches, drowsiness and fatigue. We are very pleased with this purchase - it is a great value for money well spent!

## Features

- CARBON DIOXIDE DETECTOR for HOME, SWITCH °C/°F – Great item for any home to monitor the weather and air quality! Real-time CO2 value, temperature and humidity, CO2 history chart, CO2 Concentration range, 3 Adjustable Volume for Alarm Setting & 3 Adjustable Backlight, Max/Min Data, Low battery indicator.
- HIGH-PRECISION SENSIRION CO2 SENSOR – Equipped with Swiss-made Photoacoustic Sensor provides precise and reliable readings, which gives you peace of mind about the air in your home. CO2 detection range：400～5000PPM,accuracy：+/- 5% + 50PPM. Temperature range: 14.2°F ~ 122°F, Humidity range: 20% to 95 %.
- IMPROVE VENTILATION – Very useful for high concentration of poor air quality and cooking indoors and it will indicate to open a window/door to refresh the area to get the levels lower. CO2 monitor for Home, RV, Grow Tents.
- INDOOR AIR QUALITY MONITOR - Detect rise and decrease in carbon dioxide level, perfect for anyone wanting to monitor air quality! Elevated CO2 can cause symptoms like headaches, drowsiness, allergies and difficulty concentrating, to keep an eye on air quality at home or work!
- USB POWERED OPTION & BATTERY BACKUP & ADJUSTABLE BACKLIGHT – It is plugged in which allow the multi brightness display to stay on all the time, if you prefer. Either set it on tabletops, or mount it on the wall. 3 x AAA Battery(not included) for Backup & outdoor manual calibration.
- calibration process:Place the device in a standard calibration environment of 400PPM,Press and hold the ALERT button, and power on the device or install the battery,The device will sound "Bi-BI" and the screen will display the "CAL" character and keep blinking,After three minutes of calibration, the "PASS" character will be displayed. Power off and power on the device.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Alarm | Audible |
| Brand | U UNNI |
| Color | White |
| Power Source | USB POWERED OPTION & BATTERY BACKUP |
| Sensor Type | Photoacoustic Sensor |
| Style | Classic |

## Product Details

- **Alarm:** Audible
- **Brand:** U UNNI
- **Color:** White
- **Manufacturer:** U UNNI
- **Number of Items:** 1
- **Power Source:** USB POWERED OPTION & BATTERY BACKUP
- **Sensor Type:** Photoacoustic Sensor
- **Style:** Classic

## Images

![CO2 Monitor Carbon Dioxide Detector for Home, 3 Adjustable Volume for Alerts & 3 Adjustable Backlight, Photoacoustic Sensor for Temperature Humidity & Indoor Air Quality Monitor - Image 1](https://m.media-amazon.com/images/I/61yfJZsxe5L.jpg)

## Available Options

This product comes in different **Color** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ UNNI Air quality monitor UN0602 appears accurate - Comparing to UN0601
*by T***Y on December 26, 2024*

The Unni carbon dioxide monitor UN0601 is small and light and seems very accurate. The display is clear and easy to read and can be dimmed or turned off. It comes with a USB cord that plugs in to any charger. Batteries can be used for memory or temporary testing, but are not necessary for the unit to function. To test the accuracy, I placed it outdoors and it was reading 401 ppm, which is normal carbon dioxide level in outdoor air. Indoor it was reading 568 ppm and it was going up when there were more people in the room and with some candles lit. The level went down to 489 ppm in the same room overnight when there were no people or lit candles. The monitor also has a thermometer and humidity function. I tested it side-by-side with a UNNI thermometer and it displayed the same temperature and humidity digits as the other unit, with only a fraction difference. The temperature can be set to Fahrenheit or Celsius. The monitor has an alarm feature that can be set if the CO2 level becomes too high. I tested by blowing on it and it went up to over 1000 ppm and a window symbol was lit on the display, indicating it is time to ventilate the room. This carbon dioxide monitor appears to work great and can be used in places where people gather, such as in schools, churches or similar, but also in your home. EDIT: This is a review of Unni Air Quality Monitor UN0602. There is a USB power cable and adapter included in the box along with instructions. When you first plug it in, there is a few minutes of count down before the display starts to show any values. The calendar and clock is easy to set and there is an option for 12 hour or 24 hour format, and daylight savings time. The unit monitors CO2 in the air, expressed in parts per million (ppm). The outdoor air is typically around 400 ppm for normal clean air. CO2 values over 1000 is too high and ventilation is needed. I tested the device side by side with an older same brand CO2 monitor UN0601 and found that the values were close, but not in agreement until after one week of testing. There was a 60-100 ppm difference in the values, sometimes the old unit was lower and the new unit higher, and sometimes it was the other way around. I tested both of them outdoors and noted the value was close to 400 ppm for each. The CO2 reading can be calibrated if it seems off. I did not calibrate it, since the outdoor reading seemed accurate. After a week the old and the new monitor were displaying the same CO2 values. The CO2 monitor is using a photo acoustic sensor. The unit also monitors the total Volatile Organic Compounds (TVOC) and is displayed with five different color indicators, green being the lowest and purple the highest level. The monitor was mostly green during testing, but would quickly go to purple within an hour when cooking. Just boiling a pot of pasta on an electric stove, caused the monitor to show a purple indicator even if it was in an other room. I am more interested in VOCs from paint, flooring, furniture etc. in the home, so this can be a little misleading. The particulate matter (PM) measures pollutants smaller than 1 microns (PM1) or fine, measured in micrograms per cubic meter, smaller than 2.5 microns (PM2.5), and smaller than 10 microns (PM10), or coarse. These smaller particles are invisible, like soot, viruses, smoke etc. and can cause asthma and other health issues. Values below 75 are generally considered safe. All three PM values were showing the same numbers during testing, from 0-5. The values seemed to go up at the same time when the TVOC value was going up. Both TVOC concentration value and the PM values are measured with laser detection. Not sure how accurate they are. The ambient temperature and humidity is also measured and displayed. These values seem accurate, since I compared them to several other devices. The Unni air quality monitor also has alert functions that can be set for CO2 and PM levels. The alerts can be turned on/off. The backlight on the display has two brightness levels and can be turned off by touching the upper part. This monitor can be useful after home renovations or when moving into new places with unknown materials. It can also be useful if living in areas with suspected high air pollution.

### ⭐⭐⭐⭐⭐ Very Handy Air Quality Monitor!
*by M***N on January 14, 2025*

We just purchased the Unni Air Quality Monitor for our home and fell in love with it right out of the box! It was very easy to set up. There is a nice instruction book that comes with it. The one thing missing in the manual is an explanation of the air quality acronym meanings. I had to look up their definitions. The display is clean, and colorful and very easy to read. Not only do you see current CO2 (carbon dioxide) levels, TVOC level (Total Volatile Organic Compounds, representing the combined concentration of many different organic chemicals that easily turn into gas at room temperature, used as a key indicator of indoor air quality level), and PM2.5 and PM10 levels (particulate matter in sizes 10 microns and smaller and 2.5 microns and smaller). You can set alarms for these values too. In addition to the numeric values, it also gives you readings of very good”, “good”, “normal”, “bad”, “very bad”. Bonus data displayed is indoor temperature and humidity as well as a calendar! Poor air quality could lead to headaches, drowsiness and fatigue. We are very pleased with this purchase - it is a great value for money well spent!

### ⭐⭐⭐⭐⭐ Accurate, Reliable, and Ideal for Nursery Air Quality
*by R***N on November 24, 2025*

I’ve been really impressed with this CO₂ Monitor Carbon Dioxide Detector. The readings are accurate and refresh quickly, which gives me a lot of peace of mind—especially with a new baby at home. The built-in temperature and humidity monitor is a huge bonus. It helps me keep the nursery at a comfortable and healthy level throughout the day, and the indoor air quality indicator makes it easy to catch issues before they become a problem. I also appreciate the 3 adjustable alert volumes and the 3-level backlight. They make the device flexible for both daytime use and quiet nighttime monitoring without disturbing the baby. Overall, this monitor is easy to use, reliable, and packed with practical features. Highly recommend it for anyone who wants to maintain a safe and healthy environment at home, especially for newborns.

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-03-05*