Liquid sensing cable detects leaks of petroleum based liquids along the full length of the cable, and water at the end of the water sensing wires. The water sensing wires may be separated from the cable and can be field tailored to any desired level or location for more efficient monitoring around tanks, piping, pumps, dispensers, or other critical leak detection areas. It can detect many liquids include water, gasoline, diesel, waste oil, and petroleum products.