以新研制的USB接口水位变送器为例，结合USB协议和计算机基本原理，对设备软、硬件设计进行了深入分析，探讨了在数据采集设备中直接使用USB接口的实现方法。
For the newly developed water level transmitter with USB, on the basis of USB protocol and computer principle, the software and hardware of the instrument is analyzed in detail.
超声波水位测量系统由传感器和变送器构成。
The water level measure system by Prosonic consists mainly of sensors and a transmitter.
SDI12投入式液位变送器主要用于水文站水位观测点不便建井或建井费用昂贵的地区。
YLN-SMT-HART/SDI12 is mainly used for the inputting type water level transmitter hydrological observation wells or inconvenience built costly.
SDI12投入式液位变送器主要用于水文站水位观测点不便建井或建井费用昂贵的地区。
YLN-SMT-HART/SDI12 is mainly used for the inputting type water level transmitter hydrological observation wells or inconvenience built costly.
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