Patent ID: 7119697

Claim:
Apparatus for detecting infrared emissions of hot water vapor comprising: a first sensor sensitive to a first region of a characteristic infrared water emission band extending from 2.427 μm to 3.120 μm, said first sensor generating a first signal representative of infrared radiation in said first region; a second sensor sensitive to a second region of said characteristic infrared water emission band extending from 2.618 μm to 3.120 μm, said second sensor generating a second signal representative of infrared radiation in said second region; a third sensor sensitive to a third region of said characteristic infrared water emission hand extending from 2.618 μm to 3.442 μm, said third sensor generating a third signal representative of infrared radiation in said third region; a processor in communication with said first, second, and third sensors so as to receive said first, second and third signals; said processor generating an alarm signal when said first, second, and third signals indicate presence of water vapor emissions.