Abstract: An octane sensitive blending dispenser for fluids, particularly for fuel dispensers. The dispenser controls component pumps according to octane data measured by octane meters. In one form of the invention octane measurements are taken within the input lines connected to the dispenser from fluid storage tanks. Control of the component pumps is accomplished by determining the difference between the desired blend octane and the observed blend octane and adjusting the pumps so as to more closely blend the desired fluid.

Abstract: An octane sensitive blending dispenser for fluids, particularly for fuel dispensers. The dispenser controls component pumps according to octane data measured by octane meters. In one form of the invention octane measurements are taken within the input lines connected to the dispenser from fluid storage tanks. Control of the component pumps is accomplished by determining the difference between the desired blend octane and the observed blend octane and adjusting the pumps so as to more closely blend the desired fluid.

Abstract: Methods and systems are disclosed for controlling dispensation of hydrocarbon fuels from storage tanks and the like, by employing a sensor in an environment proximal to the dispenser. The sensor preferably includes an optical waveguide having a central axis along which light can transmitted, and the waveguide is disposed in the environment, such that fuel present in the environment contacts at least a portion of the waveguide. The sensor further includes a light source for projecting light into a first end of the waveguide, and a detector for detecting the amount of light propagated through the waveguide. The sensor is electrically connected to a controller which terminates the dispensation of fuel in the event that a leak is detected by the sensor.