Moderator note: Marking @GreenMan's reply as the solution to this thread as it seems to answer the question. @GL you can un-mark it as the solution if you need more details.
... View more
The MT12 leak detector might work. It presumably works by sensing the change in current through the sensor cable, so I'd think you could use it as an open/closed detector.
... View more
You can use BXD SFP's on Meraki managed/monitored Catalyst switches but on native MS switches it is NOT supported. The choice of switch is not fitting for this requirement.
... View more
