The Grainger product website features liquid level gauges for drums and tanks made of galvanized steel and HDPE. These rod/float gauges allow easy monitoring of liquid levels in vertical storage tanks. They feature corrosion-resistant materials suitable for use with water, chemicals, petroleum products and more. The gauges have adjustable length rods from 22" to 78" and feature heavy duty clamp collars to securely attach to tank openings. They are cost-effective, durable solutions for monitoring liquid levels in industrial storage tanks.