Differences between ordinary and explosion-proof electromagnetic flowmeters

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　　Flow meters are primarily used for measuring the flow of media in pipelines and for monitoring related data. Electromagnetic flow meters, in particular, are favored by many customers due to their excellent performance and high measurement accuracy. However, in certain measurement scenarios where there are special requirements regarding the media being measured, flow meters need to have explosion-proof capabilities. So, what are the differences between ordinary electromagnetic flow meters and explosion-proof ones? In fact, there are no significant differences in principle or structure between explosion-proof electromagnetic flow meters and ordinary ones; the main difference is that explosion-proof models are designed for use in environments where flammability and explosiveness pose risks, and they come equipped with additional protective measures to ensure safety. 　　The most commonly used explosion-proof designs are flameproofing and intrinsically safe design. Since electromagnetic flowmeters require a somewhat higher amount of power, flameproof design is generally used for the transmitter part. The housing of flameproof instruments is thicker than that of ordinary instruments, with good sealing properties (the instrument cover has tight threads); they usually feature a dual-chamber design, meaning that the power connection chamber is separated from the signal connection chamber. The cable of a split-type explosion-proof flowmeter is generally an explosion-proof armored cable. There are also some two-wire electromagnetic flowmeters that use intrinsically safe design; they look no different from ordinary flowmeters in terms of appearance, but their internal circuit boards are different from those of regular flowmeters.