The Grainger website features liquid level gauges for drums and tanks. These gauges are made of galvanized steel or HDPE and use a rod or float mechanism to indicate the fluid level inside a container. Key features include compatibility with various liquids like oil, solvents and water. They resist corrosion and provide accurate, reliable level readings. These affordable gauges install easily and are available in different sizes to fit standard drums and tanks. Overall, they are simple, durable liquid level indicators ideal for industrial applications.