PM2.5 monitoring domestic instruments is less expensive than foreign half stability is not high

At present, the entry standard for the domestic PM2.5 monitoring instrument market has always been controlled by the US National Environmental Protection Agency EPA. The monitoring instruments used in various places in the country are mostly American thermoelectric Thermo Scientific company. Why domestic PM2.5 monitoring equipment has been "keeping in the depths of the people"?

On March 23rd, the Guangdong Provincial Department of Environmental Protection organized media to visit the Jiangmen Atmosphere Super Monitoring Station, domestic monitoring products of Wuhan Tianhong, Hebei Xianhe, and Anhui Blue Shield Optoelectronics Co., Ltd. for the first time collectively unveiled the Guangdong PM2.5 surveillance market.

The reporter learned that at present, domestic PM2.5 monitoring instrument market is still inconclusive with the use of domestic instruments or instruments from foreign big names. The Guangdong Provincial Environmental Protection Bureau is grinding the disc sand monitoring station and Jiangmen Heshan atmospheric super-monitoring station and closely compares domestically. External and manual sampling instruments use different methods to monitor the degree of error between the instruments to determine which instruments will eventually be used.

Domestic goods are less than half the cost of the United States Since PM2.5 monitoring was included in routine monitoring by the environmental protection agencies, the Guangdong PM2.5 instrument monitoring market was dominated by the United States's instrument manufacturing companies, and the relevant person in charge of the Guangzhou Municipal Environmental Protection Bureau once stated that Guangzhou's monitoring sites did not Domestic equipment and equipment are all from the United States."

However, the equipment in the United States is not impeccable. The major domestic media have been questioning the certification standards of the US Environmental Protection Agency and the accuracy of US company equipment. The National Environmental Protection Agency is also using domestic instruments to conduct comparative tests. On the 23rd, the reporter saw at the Jiangmen Atmosphere Super Monitoring Station that domestic auto-monitoring instruments that were participating in the comparative tests in Guangdong were products of Wuhan Tianhong, Hebei Xianhe and Anhui Blue Shield Optoelectronics. The manual sampling equipment used for comparison was mainly from Wuhan Tianhong. the company.

The reporter found that the appearance of domestic equipment and imported equipment is exactly the same. However, with the same shape of the equipment, foreign equipment prices are generally between 20 to 380,000 yuan, domestic equipment prices between 10 to 200,000 yuan, only half of foreign equipment. Li Kai, a technical staff of Wuhan Tianhong Company, told the Yangcheng Evening News reporter: “Our instruments are very simple to operate and can be read automatically after a simple maintenance.”

The key technology is still in the hands of the Guangdong Provincial Environmental Monitoring Center, said that only one province in Guangdong, to ensure that the province's 97 monitoring sites have the ability to monitor PM2.5, only the equipment needed to invest in Guangdong Finance will need to invest 100 million yuan. Monitoring staff training, site allocation costs will be calculated separately. During the “Twelfth Five-Year Plan” period, 388 prefecture-level cities in China will invest at least RMB 2 billion in the PM2.5 monitoring equipment sector. Coupled with the application of industrial pollution source monitoring equipment, the output value of pollution source online monitoring equipment industry by 2015 will surely exceed 10 billion yuan.

The reporter learned from the Department of Environmental Protection that there is no problem in the accuracy of domestic equipment compared with foreign countries. The problem is still in stability. The relevant person in charge of the Guangdong Provincial Department of Environmental Protection stated: “In fact, the key components of domestically-made equipment are the equipment imported from the United States. The stability of domestically-made equipment is not as good as that of imported equipment.”

This reporter learned that, in addition to the Jiangmen atmospheric super station, Guangdong Province Environmental Protection Department set up in the monitoring point of the grinding disc sand began to use domestic instruments to monitor PM2.5. Whether domestically produced equipment can make a difference in the US-led PM2.5 monitoring instrument market still needs to be observed.

The expert explained that "plant adsorption" does not affect the monitoring and monitoring points around the forest farms and rural areas. Will plants absorb PM2.5, leading to distortion of monitoring data?

Dr. Chen Duohong, head of the Heshan Super Atmosphere Monitoring Station, Jiangmen: Vegetation leaves do absorb PM2.5, but the amount of adsorption is small and does not affect the accuracy of the monitoring results. This can also explain why some park monitoring sites with good vegetation coverage have higher monitoring values ​​than other monitoring sites in urban areas.