What are the sampling methods of VOC gas detector?
Voc emissions from industrial sources have a direct impact on the pollution of the surrounding atmosphere, and have obvious centralized pollution. Therefore, how to prevent and control the standard voc emissions needs to be monitored and controlled by VOC detection instruments, which can be significantly improved. Especially in the key industries of industrial sources, the voc produced by industry accounts for a relatively large proportion, which is generally discharged in an organized way, with high concentration, easy to collect and treat, and has relatively mature treatment technology. The VOC detector is the eye of VOC treatment industry, which can monitor whether the VOC concentration exceeds the standard in real time. So what are the sampling methods of voc detector? Do you know? If you are not clear, Wuhan Juzhou Technology will analyze one or two for you.
What are the sampling methods of VOC gas detector?
At present, there are three sampling methods for voc detectors, namely diffusion sampling, pumping sampling and pipeline sampling.
1. Diffusion type
The so-called diffusion method is the online continuous detection of voc and the free diffusion detection method;
Diffusion sampling is mainly detected by the natural flow of gas. When the gas enters the gas chamber of the detector, the instrument automatically senses and feeds back the monitoring value in real time, so as to achieve the purpose of detection.
2. Pump suction type
The external air pump is equipped with the air inlet and outlet of the circulation adapter or the built-in air pump to realize the pumping detection mode (air pump selection);
That is to say, the pump-suction sampling is the part of the gas sensor that the detector has an additional suction pump, and the gas is quickly sucked by the suction of the air pump to realize the detection. (Vacuum pump samples imported vacuum pump, providing stable and lasting suction airflow, and the vacuum pump has long service life, low noise and adjustable speed with 5 gears. )
3. Probe rod type
Probe-rod sampling is carried out by pumping and equipped with a 1-meter-long freely retractable metal rod, which has the detection effect of "going into the ground". Like the portable pumping gas sampling in Shen 'an, the vacuum pump of the portable gas detector with probe sampling also has self-protection function.
