In China, when it comes to architecture, it is necessary to talk about decoration. The decoration materials of the house are a mixture of various organic compounds. After the decoration of the house, it is often necessary to ventilate and stand still for a period of time before personnel can enter the office and move in. The reason is that the newly decorated house materials will volatilize various toxic and harmful substances, such as formaldehyde, benzene,TVOC, toluene, ammonia, xylene, chlorine, etc., of which formaldehyde is the most harmful to the human body and is also the most difficult toxic and harmful gas to go out. The volatilization cycle will last for three to fifteen years, which leads us to talk about formaldehyde. Color change.

Formaldehyde is a toxic and harmful volatile organic compound, long-term exposure to high concentrations of formaldehyde will cause harm to the human body. Formaldehyde is a colorless gas with a strong pungent odor, soluble in water and alcohol ethers, gaseous at room temperature, usually in the form of an aqueous solution. Formaldehyde is a highly toxic substance. Formaldehyde ranks second on my country's priority control list of toxic chemicals and has been identified as a carcinogen and teratogen by the World Health Organization. Formaldehyde is also a recognized allergen and one of the potential strong mutagens.

Regarding the harm of formaldehyde to the human body, there is also a clear concentration delineation now. According to the results of epidemiological investigations, the World Health Organization believes that it is lower0.08ppm(0.1mg/m)The concentration of formaldehyde is relatively safe for the human body. As the concentration of formaldehyde increases, the harmful effects on humans and animals are also increasing,0.08ppm(0.1mg/m)It is also the indoor formaldehyde concentration limit used in most countries. When the indoor air content is0.1MG/M3Can cause eye irritation and tears;0.5MG/M3cause throat discomfort or pain;Higher concentrations can cause constant nausea, vomiting, coughing, chest tightness, asthma, and even emphysema, cancer, leukemia;When reaching30MG/M3It immediately leads to death. Long-term exposure to low-dose formaldehyde can cause chronic respiratory diseases, menstrual disorders, pregnancy syndrome(Chromosomal abnormalities, reduced neonatal physique, etc.)It even causes nasopharyngeal cancer. High concentrations of formaldehyde are toxic to the nervous system, immune system, liver and so on.

Formaldehyde sensor is a device that can detect the concentration of formaldehyde in the air, which is widely used in indoor decoration, detection and formaldehyde substance monitoring and other fields. The principle of formaldehyde sensor is based on chemical reaction,The chemical material in the sensor will react with the formaldehyde in the air, and the formaldehyde concentration information can be obtained through the electrical change of the material. Different formaldehyde sensors have different sensitivity and response speed. For different types of formaldehyde environment, it is necessary to select sensors with different sensitivity, otherwise misjudgment and missed detection may occur. The electrochemical sensor can accurately detect a very low formaldehyde concentration, and the detection of formaldehyde itself requires high detection accuracy and relatively appropriate cost. UK represented by Shenzhen Technology Co., Ltd.AlphasenseofETO-A1Sensors are a reliable choice. The following is the specific parameter information of the sensor:

Measurement range:100ppm

Sensitivity:2000 ~3200nA/ppm

Response time:

linear range:0~40ppm, full range error range5-10ppm

Overload:200ppm

Resolution:

Dimensions:20.2*16.5

Service life:2Year

Storage cycle:6Months

Working temperature:-30~50°℃

Working humidity:15~90%RH

Load resistance:10~47Q