Patent ID: 6947131

Claim:
A blood leak detector comprising: a light source projecting a beam along an optical path through an aperture having a diameter in a range of 30 to 60 thousands of an inch, wherein the beam has a wavelength in a range of about 800 to 930 nm; a light detector receiving the beam through an aperture having a diameter in a range of 30 to 60 thousands of an inch; a housing to receive a tubular liquid passage between the light source and light detector, said mount housing having a slot transverse to the optical path to receive the tubular liquid passage, wherein said slot has a width narrower than the tubular liquid passage when uncompressed; and wherein the housing further comprises side walls of the slot, and said side walls each having a recess for the light source and light detector respectively, wherein said recess is an open region in said side wall having a first end flush with the side wall and a second end aligned with the aperture.