How would you clever folks count how many times a sump pump runs using a home automation switch/device?
I suggest you create a rule using rule machine.
Create a number variable and increment by 1 on every trigger = pump is on.
For a trigger I'd probably dig out a vibration sensor, put it in a waterproof container and attach it to the pump/hose. 
Are you talking about a "dumb" sump pump?
The easiesy would probably be plugging it into a smart outlet that measures the active current. Any time the pump draws a certain amount above its normal, and then drops back to normal could count against a variable.
You could probably also rig up a contact sensor on the pump's float and count the number of times it's raised (i.e. the sensor reads as open) but that might be a bit tricky to mount depending on the pump design.
Maybe a vibration sensor on top of the pump? I expect that could capture the vibrations of the pump's motor kicking on.
Thank you for the suggestions.
I already had a float reed switch in the sump to alert me in case the water got too high.
I just mounted it lower in the sump and told Hubitat to look for a 'closed' contact which will happen when the water level lowers below the float when the pump runs.
We'll have to see if I get too many false triggers, etc.
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I do not monitor my primary sump pump that runs multiple times per day. However, I do monitor my backup sump pump that only runs if the primary pump fails or if there is excessive rainfall. I use a ZOOZ ZEN15 switch that is rated for 110V motors.
My sump pump pulls about 1 watt of power when idle due to the level detection circuitry. When the power exceeds 50 watts, I know the pump is running. That triggers a rule machine rule. In my case, the rule triggers an announcement on my siren/chimes. However, you can have the rule do anything you wish.
Just be careful that the any switch such as the ZEN15 always default on ON. The last thing you want is a flood because the power switch turned off. I would also suggest a leak sensor near the sump, just in case the pump fails.
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