The Aquametro Contoil VZO 50 FL is a Flanged mechanical oil meter, designed to accurately measure fuel oil consumption. The Aquametro Contoil VZO50 is designed for use in marine and industrial applications to measure fuel consumption for boilers, engines and generators. The VZO 50 can be retrofitted to any existing boiler/burner system, and are adaptable for installation indoors, outdoors, vertically, horizontally and diagonally. A version of the VZO 50 is also available with reed switch Pulse Output to transmit consumption information to an external management system or remote display.