美國SCSI交換（switching）是按照通信兩端傳輸信息的需要，用人工或設備自動完成的方法，把要傳輸的信息送到符合要求的相應路由上。根據工作位置的不同，SCSI可以分為廣域網交換機和局域網交換機。SCSI廣域的交換機（switch）就是一種在通信系統中完成信息交換功能的設備。在計算機網絡系統中，交換概念的提出改進了共享工作模式。而HUB集線器就是一種共享設備，HUB本身不能識別目的地址，當同一局域網內的A主機給B主機傳輸數據時，數據包在以HUB為架構的網絡上是以廣播方式傳輸的，由每一臺終端通過驗證數據包頭的地址信息來確定是否接收。也就是說，在這種工作方式下，同一時刻網絡上只能傳輸一組數據幀的通訊，如果發生碰撞還得重試。這種方式就是共享網絡帶寬。
美國SCSI是Small Computer System Interface（小型計算機系統接口）的縮寫，使用50針接口，外觀和普通硬盤接口有些相似。SCSI硬盤和普通IDE硬盤相比有很多優點：接口速度快，并且由于主要用于服務器，因此硬盤本身的性能也比較高，硬盤轉速快，緩存容量大，CPU占用率低，擴展性遠優于IDE硬盤，并且支持熱插拔
TRAFAG傳感器、TRAFAG壓力傳感器代表型號： 8891.80.3317.0100001934、8891.85.3315.0100001934、8891.77.3317.0100001934、873100663HT41205072……
Trafag pressure transmitter ECE/ECT:TRAFAG pressure transmitter ECE/ECT is now more precise due to both a newly developed calibration procedure and the Trafag in-house developed ASIC: the tighter accuracy band enables the absolute and relative pressure measurement from 0,6 to 40 bar at an accuracy NLH of 0,2% (0,2 to 0,4 bar at an accuracy of 0,3%) or from 1 to 400 bar at an accuracy of 0,5% respectively.
Owing to the sensor technology “thick film on ceramics” the innovative pressure transmitter ECE/ECT is suitable for various media with years of endurance. The pressure transmitter ECE/ECT has EMC-protection according to IEC 6100. The attractive price-performance ratio, the modular construction, various process connections and output signals as well as high resistance against vibration make the pressure transmitter ECE/ECT the market leader: Highly demanding applications in the industrial sector such as water treatment, hydraulics or machine tools are possible with the cost-effective ECE/ECT, which replace the hitherto offered ECOS/ECOAA.
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