MTG™ is a patented new mass tank gauging system. The new, self-calibrating system is installed through a single tank-top opening. It is the first and only mass tank gauging system to read and report percentage of water contained with crude oil at every storage level — tank bottom, emulsion layer and higher. The system gives accurate reports on mass of stored product, level, multiple-spot or average temperature, multiple density, water and interface measurement, vapor pressure and temperature, and leak detection.