Talk about the working principle of formaldehyde detector

Formaldehyde detector is an instrument
for detecting formaldehyde.

It realizes the rapid semi-quantification of formaldehyde in indoor air on the spot, the characteristics of simple structure, small size, easy to carry and use and intuitive
.

It can be widely used for on-site quantitative and qualitative testing
of formaldehyde in the air in the bedroom, indoor, residential area, public place, living place and factory and mine workshop.

Formaldehyde detection instrument using the principle of high sensitivity electrochemical sensor, combined with single-chip microcomputer technology and network communication technology to collect air samples at the detection site, formaldehyde in the air is absorbed by the phenol reagent solution, the reaction generates pyrazine, and the azine is oxidized by the color developer methema in the acidic solution to form a blue-green compound
.

Depending on the color shade, direct colorimetric determination
in the field.

Because the detection value of indoor pollution has a great relationship with the temperature, humidity, air pressure, etc.
of the detection environment, therefore, according to normal detection, the detected value will often deviate from
the expected.

The machine on the right side of the picture is a five-in-one detector, which can quickly detect indoor formaldehyde, benzene, ammonia, toluene, xylene, TVOC and other polluted gases, can display the date, detection time, test the temperature and humidity data of the site, the left side is the Chinese display LCD screen, the right side is the sampling timing operation, the middle is a thermal printer, you can quickly sample the scene in real time analysis, and can detect the date time, temperature, humidity and implementation standards, formaldehyde content and whether it is qualified to print into a report
。
Formaldehyde detection using the national standard phenol reagent spectrophotometry method, the use of imported photoelectric sensor, high detection accuracy, low detection limit, to solve the electrochemical formaldehyde detector sensor zero point easy drift, sampling is easy to be interfered with by other chemical gases disadvantages
.