The Aquametro Contoil VZF20 RC is a Threaded Fuel Oil Meter to accurately measure fuel oil consumption in lph or kg/h. Due to the larger flow capabilities, the Aquametro Contoil VZF20 is designed for use with boilers, engines and generators in industrial and marine environments. The VZF20 comes standard with a 4-20mA pulse output, and can easily be connected to a building management system or external display for convenient remote reading.