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 a rod 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 liquid level gauges provide a simple, reliable way to monitor liquid levels in drums and tanks.