Durable Aluminum Measuring Hole for Underground & Above-ground Fuel Tanks – Level Monitoring & Sampling Port

Durable Aluminum Measuring Hole for Underground & Above-ground Fuel Tanks – Level Monitoring & Sampling Port

The HBMH series of measuring holes are precision-engineered accessories designed for both underground and above-ground fuel tanks. Crafted from high-quality cast aluminum, these measuring holes provide a reliable solution for monitoring oil levels and obtaining fuel samples. Typically mounted near the ladder platform on top of the tank, each unit features a secure, lockable cover and bolts. The sealing groove of the cover is embedded with oil-resistant rubber or soft metals such as copper or aluminum, preventing sparks when the cover contacts iron during operation.

The HBMH series is available in two operation types: rotary and pedal. The rotary version allows the operator to twist the cap for opening and closing, offering smooth and controlled access to the tank interior. The pedal type provides hands-free operation for larger diameter tanks up to 8 inches, making it especially suitable for high-volume storage facilities. Both types are engineered to withstand temperatures from -20°C to +50°C and can be customized with flanges to meet specific client requirements.

This series is widely recognized across international markets. In the United States, it is often referred to as a “Tank Top Level Gauge with Lockable Cap,” while in Europe it is known as an “Aluminum Oil Tank Measuring Port.” In the Middle East and Asia, operators may call it a “Fuel Tank Sampling and Level Monitoring Hole” or “Pedal-Operated Measuring Hole for Petrol Tanks,” reflecting the global versatility of this product.

Ordering options are flexible, with multiple diameter sizes and bolt spacing. For example, the rotary versions include HBMH-80-150-R and HBMH-100-180-R, while the pedal-operated versions include HBMH-150-240-P and the special 8-inch HBMH-200-280-P, which is exclusively manufactured for certain high-capacity applications. This wide range ensures compatibility with diverse tank designs and installation environments.

The HBMH series offers a combination of durability, safety, and operational convenience. Its robust aluminum construction resists corrosion and wear, while the carefully designed sealing system ensures that vapors are safely contained during measurement or sampling. These features make the HBMH measuring holes an indispensable component for modern gas stations, oil depots, and industrial fuel storage facilities worldwide.