Groz 55-Gallon Drum Level Indicator, 3/4" NPT Bung Mount with Planetary Gear Float and Air Release Venturi, 0-55 Gallon Scale for Oil, Fuel, Coolant and Water Drums (48003)

KNOW WHEN TO REORDER AT A GLANCE - Stop guessing how much oil or fuel is left in your drum; the Groz DLI mounts on the 3/4" bung and shows an indicative 0-55 gallon level on a clear analog dial.

DURABLE POLYETHYLENE CONSTRUCTION - Planetary gear mechanism drives the dial via a string-connected polyethylene float, built to handle oils, fuels, coolants, water-based fluids and a wide range of liquids in industrial drum service.

ADJUSTABLE FOR DIFFERENT VISCOSITIES - Float is partially filled with water; add or remove water to tune buoyancy so the same unit reads accurately across light oils, heavy oils, fuels, coolants and other fluids in your shop.

LEAVES THE 2-INCH BUNG FREE FOR PUMPS - Threads into the small 3/4" NPT opening on standard 55-gallon drums and includes an air release venturi, so your 2" bung stays open for hand or electric drum pumps.

VERSATILE SHOP AND FLEET USE - Ideal for automotive shops, fleet maintenance, manufacturing lines, agricultural operations and lube rooms; gives an approximate fluid level so crews can arrange a new drum before run-out.