压差控制器分为油压差控制器和空气压差控制器等。前者使需要建立压差的部位保持一定压差，例如，压缩机润滑油的排出压力，应比曲轴箱内压力高0.1～0.2MPa，压缩机才能正常工作，后者当压差达到一定程度时，应进行下一步程序操作。例如，空调系统中的卷绕式空气过滤器，当进、出口压差大一定值时，说明滤材已不能继续工作，应自动换新材，这时可利用压差控制器自动操作。
压差流量计：Differential pressure flow meter 压差控制器：differential pressure controller 压差控制阀：Differential pressure controller ..
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...一个符号看不懂, PDI——压差指示器（pressure differential Indicate）PDC——压差控制器（pressure differential controller）其实还有一个：PDR——压差记录仪（pressure differential record）这个解释应该比较清楚了吧,其作用无非是显示和控制水泵压 西班...
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油压压差控制器 oil pressure differential controller
油压差控制器 oil pressure differential controller
差压控制器 [自] differential pressure controller ; differential pressure pilot ; SCEx
低压差控制器 LDO
差压式液位控制器 differential pressure level controller ; differential pressure type liquid level controller
差压记录控制器 differential pressure recorder controlller ; DPRC
压差指示控制器 pressure difference indication controller
压力差指示控制器 pressure difference indicating controller
公司主要产品为电磁阀、热力膨胀阀、视液镜、干燥过滤器及压力、压差控制器。
Our main products include solenoid valve, thermostatic expansion valve, sight glasses, filter dryer, pressure controller, pressure difference controller , temperature controller.
主要产品是与冷冻机，冷却机，加热机，空气压缩机及空调器配套的各种不同系列的压力控制器，压差控制器，流量开关。
The main products are Freezer, Cooler, Heat-up Machine, Air-Compressor, Air-conditioning Epuipment and other Various complete series of Pressure Controls, Pressure Differential Controls, Flow Switch.
正比于压差的信号（称为测量值）通过“压差变送器”被送至记录控制器。
A signal (termed the "measured value") which is proportional to the pressure difference is then transmitted by means of a "differential pressure transmitter" to the recorder-controller.
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