Description of the use of the dust detector

    Dust detectors, also known as dust gauges or dust testers, are used primarily to detect dust concentrations in ambient air. The variety of dust detectors is divided into laser dust meters, online serial monitors, portable dust meters, etc., and are widely used in disease preparedness and control centres, mines, metallurgy, power plants, chemical manufacturing, sanitary supervision, environmental protection, environmental online monitoring, etc.

    The communication protocol selects the RTU method of the MODBUS protocol, using RRU mode, where the message is sent at least 3.5 chars. When the first domain is accepted, each device is decoded to determine whether it is sent to itself.

    After the last transfer character, the end of a message is marked by a suspension of at least 3.5 characters at a time. A new message can start after this suspension. The entire tone frame needs to be transmitted as a continuous stream. If there is a pause of more than 3.5 characters before the sound frame is completed, the receiving device will rewrite incomplete messages and assume that the next byte is new.