Patent ID: 6502470
Filing Date: 2003-01-07
Classification: G01N

Abstract:
A fluid sampling system for extracting a fluid sample from a body of fluid, the system comprising fluid enclosing means arranged to enclose a volume of a first fluid into which the sample of a second fluid is to be introduced, the fluid enclosing means comprising a substantially closed chamber including a wall generally separating the first fluid from the second fluid, and a pin-hole aperture disposed thereon via which the second fluid may be drawn into the fluid enclosing means, and means for drawing a sample of the second fluid into the body of first fluid through the pin-hole aperture, comprising pressure pulse means arranged to apply a negative pressure pulse to the first fluid and in which the negative pulse applied to the first fluid is applied directly to the second fluid via the pin-hole aperture, whereby a differential pressure is caused to exist across the pin-hole aperture.