The Grainger website features aluminum and HDPE rod/float liquid level gauges for drums and tanks. These gauges allow visual monitoring of liquid levels, with floats moving up and down rods as liquid levels change. They are available in various sizes and configurations to fit different tank openings and applications. Key features include corrosion resistance, chemical compatibility, easy installation, and economical operation. These gauges provide a simple, reliable way to monitor liquid levels in drums, totes and storage tanks.