FLUID LEVEL ALARM DEVICE FOR TANKS AND THE LIKE TO MINIMIZE SPILLS OF OIL AND OTHER ENVIRONMENTAL POLLUTANTS

摘要

A gas operated audible alarm device is provided to signal the advent of an overflow condition in oil tanks and the like to minimize the hazards of environmental pollution from oil and chemical spills during tank filling operations. The device has a float operated pneumatic valve positioned at a predetermined upper limit of fluid level in a receiving tank, which valve controls the passage of an inert gas from a supply source to a gas operated whistle or horn. A multiplicity of such alarm devices are adapted to be actuated from a common supply header to monitor an entire field or complex of receiving tanks.