Designed for sampling petroleum products in tanks or seawater. Made of brass and stainless steel. Available in 500 cc and 1,000 cc sampling capacity. 1. Mouth Collecting Type Sampler: Top lid can be opened at any intermediate level inside tanks and other containers. Sample can be easily collected from any pre-determined depth inside the tank. 2. Bottom Collecting Type Sampler: (Bottom Penetrate Type) Sample can be collected from bottom (Bottom Collecting Type) at any intermediate level of tanks and other containers, or at any pre-determined depth inside the tanks.