Do you have an online reference where I can look at one of these
electronic
devices?


Unfortunately, no. I did my best to Google up a website for a manufacturer
or dealer for marine electric anti-siphon valves yesterday. Came up empty,
and I can't remember the name of the manufacturer of the three that I have
installed on my boat. Sea Ray uses these valves as OEM equipment in all
their late model cruisers. Sea Ray started using them as OEM equipment in
model year 2000, one year later than mine. I worked out a deal to retrofit
my boat where they sent me the valves at no charge, and I took care of the
labor to install them. The valves were worth $100-$150 each, if I recall.
If you really want a lead to the source, call Sea Ray customer service at
800-648-8535. I'm sure the guys in customer service could easily tell you
who their supplier of the valves is.