A tank-in-tank fill level indicator, making use of noninvasive tank-in-tank measuring techniques. A vibration device, such as an exciter or resonator, vibrates the outer tank at its natural frequency of vibration, thereby inducing the vibration of the inner tank and a beating effect as a result of the interaction of the vibrations of the two tanks. A vibration detection device, such as an accelerometer, detects the resultant beating effect of the two tanks' induced vibrations. A data processing device, such as a microcontroller, processes the detection data to obtain the liquid volume. A display, wired or wireless data transmission device, or combination thereof, is then used to provide tank or container fill-level information.

A method for ascertaining the re-starting capability of a vehicle, in particular when parking the vehicle, includes detecting the pressure and the temperature of fuel in a pressurized container, determining a final pressure value of the fuel in the pressurized container, where the final pressure value is an expected pressure of the fuel in the pressurized container after a period of parking of the vehicle, comparing the final pressure value with a minimum pressure value in order to ascertain whether the vehicle is capable of re-starting after the parking period, and generating a warning signal when the final pressure value is lower than the minimum pressure value.

The present invention relates to a liquid gas level measuring system for use in a liquid gas tank and designed to cooperate with a float level gauge head mounted on the gas tank and made of magnetically inert material. The system comprises a dial module 1 attachable to the float level gauge head and a sensor module 2 releasably connected to the dial module 1. The dial module 1 is provided with at least one directing dial magnet 103 magnetically coupled with a drive magnet of the float level gauge. The sensor module includes a Hall effect sensor, a battery 204 and a radio module with an antenna 205, allowing wireless measurement data transmission to a remote location.

Fueling verification systems and methods for corroboration of vehicle fueling are described herein. The systems and methods provide for verifiable transmission of data collected from a remote source to assure data integrity and maintain proper fuel transmission as part of vehicle fueling. The systems and methods can include collecting a first fuel measure for a fueling process from a delivery source. A second fuel measure can be recorded into a blockchain. The second fuel measure for the fueling process can be received from a recipient source. Then, the first fuel measure and the second fuel measure can be correlated to determine a fueling offset. Then, the delivery source and/or the recipient source can be compensated based on the fueling offset.

A self-calibrating system, apparatus, and method for accurately measuring a volumetric capacity of a tank. The system, apparatus and method comprise: a mechanism that adjusts a level of a platform; a light-emitting device with beam-like optics (laser, diode, etc.) mounted to the platform; mechanism for adjusting alignment of the light-emitting device with respect to the platform; a mechanism for rotating the platform by variable angles, including by 180-degrees; one or more level sensors (such as, for example, spirit levels, tilt sensors, or other devices) that provide feedback on the alignment of the platform normal to the gravity vector.

A method for filling a container with a filling product in a filling-product filling system having a control valve, having the steps: a differential pressure p.sub.v decreasing across the control valve; and regulating and/or controlling the control valve as a function of the differential pressure p.sub.v which has been determined.

A hydrogen station operation method capable of adjusting pressure in a reservoir to the pressure suitable for liquid hydrogen replenishment while cutting hydrogen waste is for replenishing liquid hydrogen into the reservoir in a hydrogen station including: a gasification path partially gasifying liquid hydrogen out of the reservoir and returning it; and a gas delivery path delivering gasified hydrogen in the reservoir into a path between a vaporizer and a compressor or the vaporizer, when the remainder of liquid hydrogen in the reservoir becomes a first threshold or less, by reducing the liquid hydrogen amount flowing through the gasification path by a valve therein, reducing the gasification amount of liquid hydrogen in the reservoir, and increasing the hydrogen gas amount delivered through the gas delivery path from the reservoir by a valve therein, pressure in the reservoir is reduced, thereby performing operation where suction pressure of the compressor is reduced.

A fluid transfer system, including a first stage, including an inlet, a surge tank, and a first cylinder operatively arranged to pump the fluid from the inlet to the surge tank, and a second stage, including an outlet, a knock out tank, and a second cylinder operatively arranged to pump the fluid from the surge tank into the knockout tank.

The present invention provides a control system (10) for managing the supply of bottled gas to users (12), the system comprising: a gas cylinder system (14) having a gas cylinder (15) for receiving and distributing gas contained therein; a first electronic monitoring system (16) associated with said gas cylinder system (14) and operable to monitor parameters associated with said cylinder system (14); a second monitoring system (18) associated with one or more locations (A-F) in which said cylinder may reside and being operable to monitor the presence or absence of said cylinder within said one or more locations (A-F); and a computer system (20) in communication with each of said second monitors (18) for receiving information therefrom relating to the presence or absence of said cylinder system (14) in said one or more locations (A-F).

A vehicle such as a terminal or yard tractor used for freight spotting is provided with one or more individual, portable LPG cylinders of the type used by forklifts facilitating tank swapping on an as-needed basis for reduced downtime. Each auxiliary cylinder is a portable, removable and replaceable cylinder having a fuel capacity less than that of the vehicle's primary tank. A controller interfaced to a sensor and a pump is operative to pump fuel from the auxiliary LPG cylinder and into the fuel line to refill the primary LPG tank when the fuel level of the primary tank falls below a predetermined level. The invention may be factory-installed onto the vehicle, or may be provided as a kit enabling an existing vehicle to be retrofitted with the auxiliary LPG cylinder(s).