http://www.go2marine.com/product/251725F/sierra-warning-kit-oil-pressure-temp.html

Problem with water would be teeing the original sensor with the electrical one. Interesting stuff. The idea is to make it so folks can use their current system without modifying anything, then make up a complete kit with proper length wires, terminals, fuse system, the works.

Deve

1950 Chevy 3100 Deluxe Cab
1950 Chevy 3100 Standard Cab
In the Stovebolt Gallery
The Think Tank
More info and tips at Deve's Technet