In the indoor environment, formaldehyde is a common harmful gas, which may come from furniture, building materials, coatings and even daily necessities. Long-term exposure to high concentrations of formaldehyde can pose a serious threat to human health, so monitoring and control of formaldehyde concentration is essential. Formaldehyde concentration detector as a monitoring tool, the scientific value of its set value is directly related to the timely detection and treatment of problems. The setting of the detector and its application in indoor air quality management will be discussed below.

Formaldehyde detector settings are usually based on national or regional indoor air quality standards. For example, China's Indoor Air Quality Standard GB/T18883-2002 stipulates that the concentration of formaldehyde in indoor air must not exceed 0.1 mg/m ³ (milligrams per cubic meter). The US Environmental Protection Agency (EPA) recommends a formaldehyde concentration limit of 0.16mg/m³. These standards provide a reference for the setting of formaldehyde detectors.