the little friends who read the content of the article here are all prepared to buy formaldehyde testing instruments in advance to check the formaldehyde content. however, they have heard that many formaldehyde testing instruments are useless and many are forbidden. however, some people are sure, just saying that you didn't choose the right one. most of them are fake, then the following Yiyuntian editor will teach everyone how to identify how to identify counterfeit formaldehyde detection instruments

1, sensors for formaldehyde detection instruments

formaldehyde detection instruments generally use the photoelectrocatalytic sensor method, which has obtained authoritative certification from all over the world. First, according to the type of gas inlet observation sensor of the tester, the volume relativity of the electrochemical sensor is very large, the semiconductor material sensor is small, and the color is generally dark gray or gray black. Second, "smell and ask". Can consult the store sensor type, if it is a semiconductor material, directly do not buy.

2, precision of formaldehyde detection instrument

national standard GB\T18883-2002" indoor air quality standard ", formaldehyde content is accurate to two decimal places, I .e. 0.01mg/m3, the products of reliable manufacturers are all designed in strict accordance with national industry standards. If there is a store propaganda precision 0.001, it can be clearly a fake product of an irregular manufacturer.

3, calibration of formaldehyde testing instruments

manufacturers of reliable formaldehyde testing instruments all have product research and development and production line equipment. calibration must be carried out in the calibration warehouse before the original testing instruments are used to ensure the accuracy of commodities. Moreover, the electrochemical detector can be corrected once without frequent correction. The calibration warehouse is an experimental cabin in a special natural environment. The calibration of instruments and equipment is carried out in the calibration warehouse. The construction of the calibration warehouse is hundreds of thousands or even millions. Generally, it is not easy for counterfeit companies to spend such a large cost.

4, formaldehyde detection instrument endurance

standby is a simple and reasonable way to distinguish whether the 1 formaldehyde detection instrument is a photoelectrocatalytic sensor or a semiconductor material sensor. The power consumption of electrochemical sensors is very small, and the key power consumption of instruments and equipment comes from the circuit board. Semiconductor material sensors work according to the heat, the power consumption is more than 10 times that of the photoelectric catalytic sensor. Generally, the endurance of formaldehyde detection instruments of 1 electrochemical sensors will exceed 5 days, while the endurance of counterfeit formaldehyde detection instruments of semiconductor sensors will not easily exceed 12 hours.

5, the price of formaldehyde detection instrument.

the cost of formaldehyde detection instruments can be said to be relatively transparent. generally, the price on the market at present should not be less than 2,000 yuan. the cost is placed there. therefore, you must not be greedy for cheap prices. many people think that a few hundred yuan can accurately detect the standard vapor concentration value. however, it is estimated that many people have bought counterfeit version numbers. after all, Shenzhen huaqiang north has strong imitation ability.

6, formaldehyde detection instrument manufacturer qualification certificate, commodity qualification certificate

first look at the formaldehyde detection instrument manufacturer is reliable, search the name of the manufacturer. From mastering the company's basic information, elite team, production and manufacturing qualification certificate, there is no ISO product quality management system, there are pictures of office space, production workshop and workshop. Second, log in to the Administration for Industry and Commerce of the city where the manufacturer is located to further search for the company's real and effective business, main business, establishment period, and reliable product research and development, production and manufacturing qualification certificates. Prevent OEM manufacturers and counterfeit manufacturers.