초록 ▼

A gas sensor unit designed to indicate the presence of hydrocarbon vapors but be insensitive to carbon monoxide. The unit comprises two TGS sensors, one covered by a semi-permeable membrane and the other uncovered; the uncovered sensor responds to both crude oil and carbon monoxide, the covered sens

A gas sensor unit designed to indicate the presence of hydrocarbon vapors but be insensitive to carbon monoxide. The unit comprises two TGS sensors, one covered by a semi-permeable membrane and the other uncovered; the uncovered sensor responds to both crude oil and carbon monoxide, the covered sensor responds only to carbon monoxide. In one embodiment, the two sensors are connected in series; the total response of both sensors and the difference in response between the two sensors are measured, and changes in the parameters indicate the presence of an oil spill. In another embodiment, each sensor\s output is compared with its reference voltage; if the uncovered sensor has an output that is higher than its reference while the covered one does not, the presence of an oil spill is indicated.

대표청구항 ▼

An oil spill detector comprising: a pair of electronic sensors responsive to both hydrocarbon vapors and other airborne contaminants the detection of which is not desired; a semipermeable membrane covering only one of said sensors, said membrane being impermeable to said hydrocarbon vapors; and elec

An oil spill detector comprising: a pair of electronic sensors responsive to both hydrocarbon vapors and other airborne contaminants the detection of which is not desired; a semipermeable membrane covering only one of said sensors, said membrane being impermeable to said hydrocarbon vapors; and electronic circuitry means connected to said sensors for discriminating between the presence of said hydrocarbon vapors and the presence of said other airborne contaminants.