The first generation of the control system was produced from 1930 to 1940,and the main representative is the mechanical control technology represented by the base-type instrument.The second generation was produced in 1950,mainly relay control technology based on electrical control technology and analog control technology represented by regulators.The current so-called control system is the third-generation control system,which was born in the 1970s.The main technical representatives are the distributed control system(DCS)for the process industry and the programmable logic controller(PLC)for the discrete industry..
控制系统的第一代产生于1930年到1940年,主要代表是以基地式仪表为代表的机械控制技术。第二代产生于1950年,主要是电气控制技术为主的继电器控制技术和调节器为代表的模拟控制技术。目前所称的控制系统是第三代控制系统,诞生于二十世纪七十年代,主要技术代表是用于流程工业的集散控制系统(DCS)和用于离散工业的可编程控制器(PLC)。
Sorensen DC Power Supply DCR40-13B
GP Sorensen – Pressure Regulator 800-190 –
Sorensen Mobile Surgical Suction Apparatus #2113 –
Sorensen STM 5-60 Power Supply 4.5-8V 60A
GP Sorensen-Fuel Injector – #800-1179N
GP Sorensen-Fuel Injector – #800-1580N
SORENSEN CENTER-MIKE CENTER DISTANCE GAGE MODEL A7
GP Sorensen-Fuel Injector – #800-1560N