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SCADA-Supervisory Control And Data Acquisition systems typically use 4-20ma current loop signalling running from 24 VDC, either in two wire or three wire configurations. Most moisture sensors have voltage interfaces designed for data logging that produce 0-5 VDC at 1 ma or so. The now defunct Hydrotek sensor was designed specifically for the interface required. If you can locate a sensor that you want to use, a convertor can be purchased or designed. Marty Grogan owner-sowacs@aqua.ccwr.ac.za wrote: > with the body of the message containing the line: > unsubscribe sowacs > > Can anyone provide me with names of suppliers of soil moisture sensors > interfaced with S.C.A.D.A system. > > regards > > Daryl Wilkie > daryl@srwa.org.au >> > > Dear Mr. Wilkie: > I am not familiar with the SCADA system, but our company manufactures soil > moisture sensors that can interface with many types of "systems" for > monitoring and/or control. In Australia you could contact our distributor, > Controlled Sprinkler Supplies Pty. Ltd. with headquarters in the Melbourne > area at: vicadm@consprink.com.au (Sam O'Brien). Let me know if I can be of > further help. > Regards, Bill Pogue, President, Irrometer Company, Inc. > URL: http://www.irrometer.com