This provides a list of things which we found reliable for a fully autonomous and remote (more then 10 hours of drive/flight away) observatory. All devices listed here are fully supported and integrated into RTS2. This list expressed our experiences - it is possible better solutions are available, but we haven't found them yet. If you find one, please let us know.
Cloud sensors are great in keeping your observatory dry. By detecting clouds before rain start, they can save you a lot of troubles.
After some research, we believe that this is the best rain sensor:
It has all features we consider important:
In our experience the best is to connect this sensor directly to PLC for dome control - see bellow.
We found that smart programmed PLC is a must for dome automatization. After some research, we believe that Zelio Smart Relays fit the bill perfectly. We provide our programmes for those PLC, which you are free to modify and use - or contact us if you need some modification.
If you will look for another PLC driving your dome, watch for:
For Zelio description, FBD sources and more: http://rts-2.svn.sf.net/viewvc/rts-2/trunk/rts-2/src/dome/zelio/