差压变送器是测量变送器两端压力之差的变送器，输出标准信号（如 4~20mA、0~5V）；差压变送器与一般的压力变送器不同的是它们均有2个压力接口， 差压变送器一般分为正压端和负压端，一般情况下， 差压变送器正压端的压力应大于负压段压力才能测量。
针对EJA智能双法兰差压变送器的具体应用情况，介绍了其典型故障的详细处理方法。
In accordance with the concrete condition of application of EJA intelligence double flanges differential pressure transmitter, typical malfunctions and their handling methods are introduced in detail.
在国内首次选用美国霍尼韦尔双法兰差压变送器智能表测量油水界面，用计算机实现闭环控制，取得满意效果。
It is the first time in China that a dual flange differential pressure intelligent meter of us Honeywell Co. make has been used for the measurement of oil water interface.
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