Patent ID: 7353687

Claim:
A reference leak having a custom-tailored leak rate for use in leak detection of a gas, the reference leak comprising: a leak layer formed of one of a metallic material, a glass material, a composite material, and a ceramic material, the leak layer comprising one or more leak through holes defined therein, a diameter and a length of each of the leak through holes being calculated according to the following equations: Q=nÃ— ( P 1 âˆ’P 2 )Ã— Y (1) Y= 12.1Ã—âˆš{square root over (29/ M )}Ã—âˆš{square root over (T/293)}Ã—( D 3 /L )â€ƒâ€ƒ(2) wherein, Q represents a custom-tailored leak rate, n represents a number of leak through holes, P 1 represents a pressure of a gas intake side of the reference leak, P 2 represents a pressure of a gas outlet side of the reference leak, Y represents a conductance of the reference leak, M represents a molecular weight of the gas to be detected using the reference leak, T represents an operational temperature, D represents one of a width and a diameter of the one or more leak through holes, and L represents a length of the one or more leak through holes.