The Grainger website features liquid level gauges for drums and tanks made of galvanized steel and HDPE. These rod/float gauges allow visual monitoring of liquid levels in vertical storage tanks. They consist of a float, guide wire, and indicator. As the liquid level changes, the float rises or falls and indicates the fluid level on a graduated scale. Key features include corrosion resistance, chemical compatibility, easy installation, and accurate level indication. These affordable gauges are available in various sizes to fit different tank diameters. They are a reliable solution for monitoring liquid levels in industrial storage tanks.