I recently picked up several of these dome leak sensors on eBay all brand new for about 30 bucks each and I need it to monitor two distinct places underneath my sink and I didn't want to waste using two sensors so I came up with this method to use the sensor itself along with its probe at the same time to monitor two different nearby locations for water.
So it's a little hacky, but works perfectly and can be easily removed if/when needed.
Drilled a hole near each leg contact point and just added some short wire legs.