It has an output....that means you could just get creative on what you want to do with that output.
Warning light
Kill ignition
boost pump voltage
kick on a second pump
activate fuel noids on a plate kit
Maybe if it had electronic boost controller...dump boost pressure

Lots of things.

Scott...is it just a switch like on and off...or is it more like a 0-5 volt reference from full to empty.

If it was a 0-5 volt setup...you could do alot more than just the above.