Since the reform and opening up, China's social economy has developed rapidly, and people's living standards have also been greatly improved. It is no longer just the pursuit of food and clothing as in the past. Now people in China are paying more and more attention to the quality of life and physical and mental health. What is closely related to us is the indoor air quality. After all, we are indoors most of the time of the day, and the indoor air circulation is far inferior to the outdoor, and the self-cleaning ability is far inferior to the outdoor atmospheric environment. According to research data show that the body needs to inhale every day10─12Cubic meters of air, converted into mass is probably13-15kgAbout, and the body needs water every day is2kgLeft and right. This shows the importance of air quality to human health. If the air quality is too poor, it will endanger human health.

About Air Quality IndexAQI, air quality categories, air quality descriptions, and health impacts are linked as follows:

The impact of air quality on human health can be seen. This shows how important it is to create a clean, healthy and comfortable indoor environment. How to create such an environment? First of all, we need to know what are the main sources of indoor air pollution:

1, latex paint, latex paint that is not environmentally friendly, or latex paint that is not environmentally friendly enough, will contain formaldehyde andVOC；

2, Wooden furniture paint, such as beds, wardrobes, cabinets, shoe cabinets, TV cabinets, tea tables, dining tables and other wooden, need to be painted, more or less contain volatile irritating odors, such as formaldehyde, etc.VOC。 

3Poor quality plastic and rubber products, suchPVCPipes, rubber hoses, etc., poor materials will contain irritating volatile gases. Kan

4Curtains, fabric, etc., the newly bought goods will also contain some pungent odor during processing. Kan

5Ammonia, hydrogen sulfide, smoke and other odors produced by household waste.

Countermeasures: First of all, attention should be paid to indoor ventilation, and windows should be opened regularly every day to keep the indoor air fresh; attention should also be paid to indoor environment purification, such as placing activated carbon or green plants, especially when the house is newly decorated or newly added furniture, It should be confirmed whether the indoor air quality meets the healthy living standards; if conditions permit, it is recommended to install air purifiers, fresh air systems, etc. to purify indoor air.

There are some problems here. Some indoor environment air circulation is not smooth, ventilation is not good, which requires an exhaust fan auxiliary ventilation, the exhaust fan can not always open, right. When it comes to the point, how do you know when to turn on the exhaust fan and the purifier? The answer is to decide whether to work according to the indoor air quality level. How do you know the indoor air quality level? This requires a sensor that can detect air quality. There are many ways to detect air quality, common with optical principles,PIDelectrochemical, semiconductor principles, etc. The general price of optical principles is high, and ordinary civilian fields are basically unaffordable;PIDThe same is true, generally used in the industrial field; electrochemical linearity is better, but the life is too short, and generally requires timing calibration, the application is too troublesome. The small size, long life, and low price of the semiconductor principle are very suitable for air quality testing in the civilian field. Here to recommend you a semiconductor principle of air quality sensor:TGS2602。

This is an air quality sensor developed by Figaro in Japan. The semiconductor sensor technology is derived from the Japanese Figaro, they have a deep accumulation of technology. There is no need to worry about quality and reliability. Of course, we also want to look at this sensor is good?

First of all, we look at the response speed of the sensor to some polluted gases. After all, if the sensor does not respond to polluted gases in time, it may put people in danger, so we must find hidden dangers in time. (respectively to10ppmAlcohol,10ppmAmmonia,1ppmof hydrogen sulfideT90response time), visibleTGS2602The response speed to these indoor polluted gases is very fast.

Next, let's talk about the long-term stability of the sensor. After all, if the performance is unstable and fluctuates too much, it will cause the sensor to misreport and delay, which will seriously endanger the safety of people's lives and property. While the R & D and production of FigaroTGS2602It has been on the market long enough to stand the test of the market. Long-term stability can refer to the figure below.

The most important thing for home air quality sensors is response time and long-term stability. FurthermoreTGS2602The application circuit is very simple, greatly reducingOEMThe difficulty of the manufacturer's research and development. Here, it is recommended that manufacturers use the method of grading display to determine the degree of pollution, which can not only reduce the error, but also facilitate the selection of different methods to purify indoor air according to the degree of pollution. Different pollution levels of exhaust fans use different wind or air purifiers to operate at different power.

The following isTGS2602Some basic parameters:

Detection range:1-30ppm

Test object: air pollution (VOC, ammonia, hydrogen sulfide)

Supply voltage:5.0±0.2V

Heating voltage:5.0±0.2V

Heating power consumption: about280mW

Response time:

The following isTGS2602Some features:

* Right.VOCHigh sensitivity to odor

* Low power consumption

* High sensitivity to polluted air

* Long service life

* Simple application circuit

* small volume

Such as rightTGS2602Interested to know more, welcome to consult.