Formaldehyde has always been a matter of great concern to home improvement and rental people. If you want to live a better life, health always comes first. What can a home formaldehyde detector do? If you are concerned about formaldehyde safety, read on. (The following content refers to household formaldehyde detectors collectively as formaldehyde detectors)
1. What can a formaldehyde detector do?
First of all, the formaldehyde detector is a supplementary tool for CMA testing. This concept, including the CMA agency itself, is not realized. Use a formaldehyde detector to monitor and screen. When the formaldehyde data exceeds the standard, it is recommended to ask the CMA agency to conduct a retest for confirmation. This is the same as the traffic police checking for drunk driving. They first blow to screen, and then draw blood to confirm the diagnosis. The formaldehyde detector may misjudge that the standard is exceeded, but it will not miss the exceedance.
Formaldehyde detectors are different. There is no need to wait for readings when turned on. Therefore, the formaldehyde detector has the following advantages:
1. Repeatedly detect indoor formaldehyde indicators:
We talk about formaldehyde removal methods, and there are two options: ventilation or treatment, but in the end the standards must be met before you can move in. When the standard is reached, we do not rely on experience, but use CMA or formaldehyde detector to tell you what the current formaldehyde indicator is. For example, according to the requirements of GB/T18883-2022, the formaldehyde value must be less than 0.08mg/m3 before you can move in with confidence. Formaldehyde detectors can test your home over and over again.
2. Find the source of pollution:
When indoor air quality exceeds the standard, it is necessary to find the source of pollution and deal with it accordingly. For example, cabinets, bed boards, curtains, etc. are all suspects. CMA or other detection methods can only measure indoor average air indicators. The formaldehyde detector can easily detect the above furniture.
3. Generate historical curve:
The air indicators are dynamic, with formaldehyde values ranging from high to low. When the door is closed, the formaldehyde concentration increases, and when the door is opened for ventilation, the formaldehyde concentration decreases. You can't catch its peaks or valleys. Formaldehyde detectors with historical curves can intuitively reflect household living habits and fluctuations in formaldehyde indicators through 30 days of historical data. Generally speaking, as long as the formaldehyde index is below 0.06 after 6 consecutive months of observation, and there is no obvious rising band, it can basically be judged that the formaldehyde value is already within a safe range.
Household formaldehyde detectors use semiconductor or electrochemical sensing chips to react with formaldehyde and other pollutants in the air to generate electrical signals, and then convert the signal size into the concentration of pollutants in the air. When measuring, the air flow rate, humidity, temperature, and other gases in the environment will have a great impact on the accuracy of the data.
The indication error can generally be used to judge whether the measurement of this type of instrument is accurate, while the indication repeatability can be used to illustrate the instrument's ability to reproduce values in a short time. If the indication repeatability is not good, it will be difficult to judge the measurement. The credibility of the results.
Generally, after a house is renovated, the concentration of formaldehyde is relatively high. If the human body is exposed to it for a long time, it will cause diseases. Because decoration materials contain a variety of irritating, toxic and harmful gases, such as benzene, formaldehyde, ammonia, radon, etc., these toxic and harmful gases will cause a certain degree of discomfort to the human body, such as difficulty breathing, eyes irritated and tears, etc. Therefore, it is recommended not to move in to a newly renovated house immediately, but to leave it for a while before moving in. In particular, if the formaldehyde gas exceeds the standard, a professional formaldehyde detector must be used to detect indoor toxic formaldehyde gas. Only those who pass the test can move in.
my country's indoor formaldehyde safety standard is 0.08mg/m3, but according to WHO research, formaldehyde concentrations exceeding 0.06mg/m3 risk causing asthma in children. In December 2005, a survey by the China Association for Standardization and the China Children's Health Care Disease Control and Prevention Guidance Center showed that up to 2.1 million children died of respiratory infections caused by decoration pollution every year across the country, of which more than 1 million children under the age of 5 died from indoor causes. related to air pollution.
Formaldehyde is a colorless gas with a pungent odor, also known as
As formic aldehyde. Its chemical formula is HCHO or CHO, and its molecular weight is 30.03. Its content is too high and can cause irritation to people's eyes and nose.
However, formaldehyde is an important organic raw material, mainly used in the plastic industry (such as phenolic resin, urea-formaldehyde plastic and electric jade), synthetic fibers (such as synthetic vinylon and polyvinyl formal), leather industry, medicine, dyes, etc. .
The formaldehyde detector is an instrument that specializes in quickly detecting the concentration of formaldehyde in the air. Currently, the most widely used indoor formaldehyde detector is the portable formaldehyde detector. It is simple to use. You can turn it on with one click and you can measure the air in real time within a few seconds. The formaldehyde gas concentration in the formaldehyde detector is detected. When the measured gas reaches the preset alarm point, an audible and visual alarm will be automatically issued to prompt the formaldehyde detector. The main detection principles of the formaldehyde detector are: electrochemistry, infrared, catalytic combustion, thermal conductivity , PID photoion, etc. Among them, the principle of electrochemical formaldehyde detector has the characteristics of low power consumption, long life, high sensitivity, good linearity and repeatability. It has become one of the most common and mature detection technology principles for detecting toxic and harmful gases.
There are two types of formaldehyde detectors on the market: one is a household formaldehyde detector and the other is an industrial formaldehyde detector. Sensors based on semiconductor principles are commonly used as core accessories of inspection instruments. The advantage of this type of formaldehyde detector is that it is low in price and suitable for civilian use; the disadvantage is that the detection accuracy is not high and the error is large.
There are many working principles, including electrochemical principles, PID photoionization principles, infrared principles, etc. However, most of them still use the electrochemical sensor principle because it has low power consumption, long life, high sensitivity, linearity and repeatability. OK
The formaldehyde detector is an instrument that specializes in quickly detecting the concentration of formaldehyde in the air. Currently, the most widely used indoor formaldehyde detector is the portable formaldehyde detector. It is simple to use. You can turn it on with one click and you can measure the air in real time within a few seconds. It detects the concentration of formaldehyde gas in the air. When the measured gas reaches the preset alarm point, an alarm will automatically sound. Among them, QBH’s formaldehyde/TVOC rapid detector FT03 is very popular in the market because of its accurate measurement, sensitive response, portability and ease of use, and sound and light alarm.
QBH's FT03 formaldehyde/TVOC testing instrument uses imported high-quality new fuel cell electrochemical sensors, which can quickly test formaldehyde and TVOC values in real time. It is an instrument that can meet the air pollution testing needs of different occasions. It has the characteristics of high accuracy, fast response, small size and high sensitivity, and is easy to carry. It is suitable for quickly searching for formaldehyde and TVOC pollution sources in homes, offices, factories, hotels, schools and other indoor environments. It can also quickly detect formaldehyde and TVOC in the air. TVOC concentration value and calculation of air pollution index, thus reflecting the degree of air pollution in real time.
By info sales-21@qbhscope.hk Published On Or Welcome to click on the chat box on the left to inquire and leave a message
