AFS-20 is designed for indoor use wherever diesel fuel or other hydrocarbon based liquids are stored or pumped. There are no tools needed for installation and the system is designed for immediate and simple installation by the end user. Sensors are placed on the floor, in a drip pan or within a mini-containment where leaking fuel will accumulate. The area beneath a pump or valve, underneath a day tank or below a filter body would be typical application areas. A stainless steel hold-down fixture is available to keep the sensor in place in high traffic areas.