What is hcho air quality?

HCHO, or formaldehyde, is a common indoor air pollutant. In many cases, people use air quality detectors to monitor indoor air quality, of which HCHO is an important indicator. However, it is important for the user to know how to properly use an air quality tester and to understand the meaning of its values.

What is hcho air quality
What is hcho air quality

What is hcho air quality?

First, let’s understand the meaning of HCHO. Formaldehyde is a toxic gas that is harmful to human health. Prolonged exposure to high levels of formaldehyde can lead to a variety of health problems, including respiratory problems, allergic reactions, and immune system suppression. Therefore, ensuring that the concentration of formaldehyde in indoor air is within safe limits is critical to people’s health.

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Air Quality Monitor FS00802G

How to choose to use an air quality monitor?

The purpose of using an air quality detector is to understand the indoor air quality situation so that appropriate measures can be taken to improve indoor air quality. There are several factors to consider when selecting and using an air quality detector:


1. Choosing the right instrument: There are many different types of air quality testers available in the market, including Electrochemical gas sensors, light scattering sensors, and so on. It is crucial to choose the right instrument according to the needs and budget.

2. Placement of the tester: Place the tester at a height of about 1 meter above the ground, which is closer to the height of the pollutant release source, and make sure it is away from heating/cooling equipment such as air conditioners and heaters to avoid misleading results.

3. Regular calibration: It is very important to calibrate the air quality detector regularly to ensure its accuracy. Most manufacturers recommend annual or bi-annual calibration.

4. Interpretation of values: Users need to understand what the HCHO value means when the detector displays it. Generally, the lower the value, the lower the concentration of formaldehyde in the indoor air. However, the results of a test do not fully represent the entire indoor environment of the air quality, the need for multiple tests and comprehensive analysis.

5. Cooperate with other measures: In addition to the use of air quality detectors, users can also take some measures to reduce the concentration of formaldehyde indoors, such as the use of qualified furniture, ventilation, and air exchange.

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Air Quality Sensor Module

In addition, when HCHO values are abnormal, users need to take appropriate measures to improve indoor air quality. This may include replacing furniture, increasing ventilation, using purifiers, and so on.


The HCHO indicator in the air quality detector represents the concentration of formaldehyde in the indoor air. Proper selection and use of an air quality detector can help users understand and control indoor air quality. Meanwhile, when the value is abnormal, users need to take appropriate measures to improve indoor air quality.