Many people may find it strange when they first hear the word VOC. In fact, VOC includes benzene series, organic chlorides, freon series, organic ketones, amines, alcohols, ethers, esters, acids and petroleum hydrocarbons. Under sunlight, NOx will chemically react with VOCs in the atmosphere to generate photochemical smog such as ozone, peroxynitroacyl, aldehydes, etc., causing secondary pollution and irritating the human eyes and respiratory system; and many VOCs are toxic And accompanied by stench, it affects the health of human respiratory system, and even some VOCs can cause cancer; in addition, most VOCs are flammable and explosive, and when the emission concentration is too high, it will cause fire and explosion. It can be said that VOC has become the public enemy of all mankind. In this case, a VOC detector is required. The VOC detector can be used to continuously measure toxic and harmful organic gases in hazardous or industrial environments, and is especially suitable for personal safety protection and on-site VOC detection. So what are the advantages and disadvantages of the VOC detector bus system and split line system?

1. The signal is unified, and the probability of failure is low. The bus control system does not have such inconvenient factors at all, and the data is transmitted in the same form on the data line, which enhances the reliability of the data.

2. The wiring is simple and the workload is small. The obvious advantage of the bus system is that the amount of wiring is small, the wiring is simple, and the cost is low. Four-bus system, two signal lines, two power lines, simple and convenient wiring.

1. Signal delay. The data is flashed out one by one, especially when there are a lot of probes.

2. Power supply problem. All probes are powered centrally by the host. When the number of probes is large, the power supply capacity of the host is insufficient, so local power supply is required.