Patent ID: 7547298

Claim:
A sampler for sampling a first portion of a liquid flow, comprising an upper portion, a valve portion, and a sample chamber, wherein the upper portion comprises a sample inlet and the valve portion comprises: a valve inlet coupled to the sampler inlet; a valve outlet opening into the sample chamber, wherein the valve outlet is positioned substantially below the valve inlet; a vent tube extending between the vent inlet and the vent outlet, wherein the vent inlet is positioned within the sample chamber and the vent outlet is positioned at a level above the valve outlet; a shut-off chamber separating the valve inlet from the valve outlet; and a shut-off chamber overflow-comprising a valve overflow leading out of the shut-off chamber, wherein the liquid flow enters the upper portion, passes through the sampler inlet and valve inlet into the valve portion, and the first portion of the liquid flow passes through the valve outlet into the sample chamber.