Patent ID: 8020430
Filing Date: 2011-09-20
Classification: G01M,H01M,Y02E,Y02T

Abstract:
1. A passive leak detection device comprising a pressure switch, a check valve and a balance valve wherein: the pressure switch comprises an electric input lead, an electric output lead, a balance chamber and an inlet chamber, wherein a pressure differential between the balance chamber and the inlet chamber is operable to close the pressure switch and is further operable to electrically couple the electric input lead to the electric output lead; the inlet chamber is fluidly coupled to a fluid port; the balance chamber is fluidly coupled to the fluid port with a check valve disposed between the balance chamber and the fluid port such that fluid flowing from the fluid port to the balance chamber passes through the check valve, wherein the check valve is oriented to prevent fluid flow from the balance chamber to the fluid port; and the balance chamber is fluidly coupled to a balance valve, wherein: