Patent ID: 7940165

Claim:
A propane fuel sensor comprising: a signal generating apparatus that generates a signal in an effective signal path to detect a presence of propane fuel in a fuel line, wherein the propane fuel sensor is mounted to the fuel line intermediate an inlet port and an outlet port of the fuel line; a fuel trap comprising: a first cross-section area configured to trap liquid propane fuel as the propane fuel is transmitted through the fuel line and past the signal generating apparatus, wherein the propane fuel enters the fuel trap via the inlet port, and wherein the propane fuel leaves the fuel trap via the outlet port; and a second cross-section area configured to concentrate the liquid propane fuel transmitted past the signal generating apparatus, wherein the second cross-section area is smaller than the first cross-section area; and a housing containing the signal generating apparatus and the effective signal path, wherein the housing is in contact with the propane fuel passing through the fuel trap and past the housing for detection by the effective signal path.