Patent ID: 7437959

Claim:
An apparatus, comprising: a sampling chamber defined by a chamber sealing membrane, a base, a chamber wall and a chamber ceiling, wherein said sampling chamber is adapted to be watertight, wherein: said chamber sealing membrane is operatively coupled to said base; said base is operatively coupled to said chamber wall, and said chamber wall is operatively coupled to said chamber ceiling; a drive shaft housing, operatively coupled to said chamber ceiling in a watertight manner, wherein said drive shaft housing forms a concentric cylinder substantially centered upon a central longitudinal axis of said apparatus; a drive shaft sealing membrane, operatively coupled to said drive shaft housing in a watertight manner forming a concentric cylinder substantially centered upon said central longitudinal axis of said apparatus; a drive shaft, operatively coupled to said drive shaft sealing membrane, capable of rotating along said central longitudinal axis of said apparatus; a spring retainer, operatively coupled to said drive shaft, capable of retaining a spring; a pressure spring, operatively coupled to said drive shaft housing and said spring retainer, capable of simulating a desired pressure; a cleaning pad, operatively coupled to said drive shaft, capable of rotating in response to rotation of said drive shaft; a mechanical drive device, operatively coupled to said drive shaft, capable of providing a rotational force that rotates said drive shaft; and a chamber sealing device, operatively coupled to said sampling chamber, capable of providing a watertight seal between said sampling chamber and water outside of said sampling chamber.