How Does an AQI Sensor Work?

September 26, 2022

The AQI sensor is a sensor that measures air quality. It detects levels of various pollutants including ozone, sulfur dioxide, and nitrogen oxide. If the AQI level crosses a preset or programmable threshold, the sensor will start purifying the air. Figure 5 shows the basic function of an AQI sensor.

AQI sensor measures air quality

An AQI sensor is a device that measures air quality. It measures the AQI for common pollutants, based on EPA’s National Ambient Air Quality Standards. A high-quality sensor will provide accurate data. Most low-cost sensors do not meet these standards. Fortunately, there are many high-quality sensors available for your home.

An AQI sensor works by measuring the concentration of two chemical compounds through electrochemical methods. It measures both ozone and nitrogen oxide levels, and is calibrated to report aqi sensor values to the EPA. In addition, it has a light diode that changes colour to show the current air quality. This colour signal is consistent with an AQI or CAQI scale.

Some sensors measure multiple pollutants, and can even detect smoke in your home. These sensors can help you identify the causes of poor air quality in your home. Some common pollutants are radon, secondhand smoke, combustion, and volatile organic compounds. While these are important factors to consider, they do not always give a full picture of your air quality.

It focuses on ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrous oxide

An AQI sensor measures air pollution levels in a variety of units, including particulate matter, carbon monoxide (CO), sulfur dioxide (SO2), nitrous oxide (N2O), and ozone (P.O.). Particulate matter, for example, is made up of solid and liquid droplets of different sizes. Some particles are so fine that their diameters are only 2.5 micrometers. Carbon monoxide, on the other hand, is a colorless gas produced when material containing carbon is not completely burned. Lastly, nitrous oxide (NO2) is a highly reactive gas that can affect human health.

The EPA calculates the AQI based on ambient air monitoring data and the national standard. Each individual AQI index is related to specific health effects and focuses on the shortest time period in which a particular pollutant is harmful. A high AQI indicates a high health risk, and low levels indicate low air pollution.

It detects oxygen levels

An AQI sensor detects oxygen levels in the air through electrochemical processes. It detects a gas that consists primarily of oxygen and warns you if it is too high or too low. The sensor will also detect carbon monoxide and carbon dioxide. It produces an electrical current proportional to the concentration of each of these gases. An AQI sensor can last up to two years before it needs replacement.

The AQI sensor can also be used for measuring other air pollutants. It can measure formaldehyde, particulate matter, and TVOC. It can also detect the level of CO2, light, and humidity in the air. This AQI sensor is portable and can be easily moved around the house.

It can be enhanced to purify air only if the AQI crosses a preset or programmable threshold

Air quality index (AQI) is a metric that measures the amount of different pollutants in the air. According to the Environmental Protection Agency (EPA), there are varying levels of air pollution. In order to measure air quality, you need to measure the amount of pollution in your environment and use a formula to determine AQI.

For example, Purple Air’s sensor is inexpensive and easily installed by a layperson. The sensor collects data and sends it to the cloud. The data is then presented on an online map in real-time. However, the data only reports the amount of particles in the air, not ozone.

It can be cleaned with compressed air

If your AQI sensor is not giving you the correct reading, it might be dirty. If that is the case, you can clean it using compressed air. First, turn off the monitor to prevent damage to the fan that is inside the sensor. Use compressed air to blow out the debris.