What are the sampling methods available for the VOC gas monitors?
VOC emissions from industrial sources have a direct impact on surrounding air pollution, and have obvious concentrated pollution. Therefore, the issue of how to prevent and control VOC standard emissions needs to be monitored and controlled through VOC detection instruments to achieve significant improvement. Especially for key industries among industrial sources, the VOC generated by industry accounts for a large proportion. It is generally organized emissions with high concentration, easy to collect and process, and has relatively mature management technology. VOC detectors are the eyes of the VOC management industry and provide real-time monitoring. Whether the concentration of VOC exceeds the standard. So what are the sampling methods for voc detector? Does everyone know this? If you are not sure, Wuhan Juzhou Technology will explain it to you below.
What are the sampling methods for VOC gas detectors?
Currently, there are three types of VOC detectors based on sampling methods, namely diffusion sampling, pump sampling, and pipeline sampling.
1. Diffusion type
The so-called diffusion type refers to VOC online continuous detection and free diffusion detection method;
Diffusion sampling mainly detects through 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 to achieve the purpose of detection.
2. Pump suction type
The external air pump is optionally equipped with a flow-through adapter for air inlet and outlet or a built-in air pump to achieve a pump-type detection method (air pump optional);
That is to say, the pump-type sampling method adds an extra suction pump to the detector, and relies on the suction of the air pump to quickly suck the gas into the air chamber of the gas sensor to achieve detection. (The vacuum pump is an imported vacuum pump, which provides stable and long-lasting suction air flow. The vacuum pump has a long life, low noise, and has 5 adjustable speeds.)
3. Probe type
Probe-type sampling uses pump suction and is equipped with a 1M-long freely retractable metal rod for sampling, which has a detection effect of "going up to the sky and down to the ground". Like Shenzhen Guoan's portable pump-type gas sampling, the vacuum pump of the probe-type portable gas detector also has a self-protection function.
