The original tank lower sampler is installed

The original tank lower sampler is installed 

Enclosed samplers typically have one or more sealed valves or sealed interfaces, which are designed to ensure complete isolation of the sample container or pipe from the external environment during the sampling process. This tightness prevents air, moisture, dust, or other contaminants from entering the sample. Closed sampler generally adopts a completely closed design, and the shell, valve and connector of the equipment are made of high-strength and corrosion-resistant materials to ensure its long-term stability and reliability.