Abstract: A wireless pressure sensor for sensing pressure of a liquid in a tank includes a hermetically sealed housing, at least one sensor, at least one photocell array, at least one communication device, and at least one energy storage device. At least a portion of the hermetically sealed housing has a diaphragm. The at least one sensor within the hermetically sealed housing is configured to sense the pressure of the liquid. The at least one photocell array is configured to receive light and generate power from the light. The at least one communication device is configured to transmit data corresponding to the sensed pressure using wireless radio frequency signals. The at least one energy storage device is configured to store power generated by the at least one photocell array and provide power to the at least one sensor and the at least one communication device.

Abstract: An integral fluid measurement system includes a first sensor configured to communicate using a first communication technology, a second sensor configured to communicate using a second communication technology, and a hybrid interface unit including a first interface configured to communicate with a first sensor using a first communication technology and a second interface configured to communicate with a second sensor using a second communication technology, where the first and second communication technologies are different from each other and may include electrical, fiber optic, radio frequency, optical pulse, and sonic pulse. The hybrid interface unit may also include a digital signal processor, data bus, and power supply, and may be capable of being disposed on a fluid tank wall.

Abstract: A wireless pressure sensor for sensing pressure of a liquid in a tank includes a hermetically sealed housing, at least one sensor, at least one photocell array, at least one communication device, and at least one energy storage device. At least a portion of the hermetically sealed housing has a diaphragm. The at least one sensor within the hermetically sealed housing is configured to sense the pressure of the liquid. The at least one photocell array is configured to receive light and generate power from the light. The at least one communication device is configured to transmit data corresponding to the sensed pressure using wireless radio frequency signals. The at least one energy storage device is configured to store power generated by the at least one photocell array and provide power to the at least one sensor and the at least one communication device.

Abstract: An integral fluid measurement system includes a first sensor configured to communicate using a first communication technology, a second sensor configured to communicate using a second communication technology, and a hybrid interface unit including a first interface configured to communicate with a first sensor using a first communication technology and a second interface configured to communicate with a second sensor using a second communication technology, where the first and second communication technologies are different from each other and may include electrical, fiber optic, radio frequency, optical pulse, and sonic pulse. The hybrid interface unit may also include a digital signal processor, data bus, and power supply, and may be capable of being disposed on a fluid tank wall.

Abstract: A sensor system includes a sensor operatively connected to a liquid storage vessel. An electronics unit is operatively connected to the sensor. The electronics unit includes a power source for providing electrical excitation to the sensor. An antenna is operatively connected to the electronics unit to receive data there from and to provide power to the power source. The antenna is wirelessly connected to a remote processing unit to transmit data thereto and to receive power there from.

Abstract: A vehicle antenna comprises a transparent, electrically conducting, film between the inner and outer glass sheets of a vehicle window. The film comprises a horizontally elongate principal element substantially parallel to and spaced from the upper edge portion of the window aperture and having an effective horizontal length of an odd multiple of one quarter of a predetermined wavelength and an impedance matching element. The impedance matching element comprises a main portion having a peripheral edge with a horizontal upper portion spaced below the principal element and a remainder spaced from the remaining edge portion of the window aperture so as to form a slot transmission line having an effective length of one half the wavelength, which is preferably in the commercial FM band. The impedance matching element further comprises a narrow vertical portion connecting the main portion to the principal element, so that the slot transmission line is parasitically coupled to the principal element.