A gas detection system is for detecting the remaining amount of gas in a gas tank that stores a predetermined gas. The gas detection system includes: a gas detector that detects the predetermined gas; and a shutter (e.g., a pressure detector) that is connected between the gas tank and the gas detector and opens and closes a path of the predetermined gas from the gas tank to the gas detector.

An apparatus for feeding gas mixtures to a compressor comprising a tubular mixing pipe connected with the compressor intake, first and second gas intake devices injecting into the mixing pipe gas received from a Helium source and an Oxygen source respectively, two sensors measuring the Oxygen percentage of the gas mixture, a first servo-controlled throttling valve interposed between the first gas intake device and the Helium source, a second servo-controlled throttling valve interposed between the second gas intake device and the Oxygen source, and a control unit configured to manage the throttling valves depending on the Oxygen percentages of the gas mixture measured by the sensors. The apparatus includes first and second auxiliary pressure regulators, electrically connected with the control unit, interposed respectively between the first servo-controlled valve and a manual regulator of the Helium source and between the second servo-controlled valve and a manual regulator of the Oxygen source.

A multiply-redundant system that prevents a driver from starting and/or moving a vehicle if a compressed natural gas fill system is not correctly and completely disconnected from the vehicle. One or more sensors in combination with one or more optional microswitches combine to lock-out the vehicle's ignition or otherwise prevent it from starting and/or moving. For different levels of safety, different combinations of sensors can be used with the lowest level having a single proximity sensor sensing the presence or absence of a high-pressure fill hose. The highest level of safety being achieved by having separate proximity sensors on the fuel fill hose fitting, the gas cap cover and a manual safety valve along with a redundant microswitch. An optional override that may be restricted as to the number of times it can be used can allow starting with a faulty sensor in order to allow maintenance.

Station for dispensing natural gas, which comprises a source of natural gas (2) in the form of compressed gas or in the form of cooled liquid, a dispensing column (dispenser) (3) of such natural gas and feed means (4), which are hydraulically connected to the source of natural gas (2) and to the dispenser (3) in order to send the natural gas from the source to the latter. The dispenser (3) comprises at least one suction hood (100), positioned above the ground level, provided with a suction opening (101), susceptible of collecting natural gas dispersed in the environment, and with at least one expulsion opening (102) for evacuating the collected gas safely. The relevant engagement seat (30) of the gas dispensing head (5) is arranged below the suction opening (101) of the hood (100). The latter is exposed to an air flow, forced or natural, which crosses the relevant mechanical and/or electrical components controlling the gas flow to the heads (5), so as to safely evacuate possible leaks thereof.

A high-purity phosphorus oxychloride safety feed system improves continuity and intelligent control of operation and usage, addresses alarm reporting, takes measures when leakage of high purity phosphorus oxychloride occurs, and solves problem of on-site and remote monitoring and material liquid level monitoring during use. The feeding device is provided with: an automatic tail gas exhaust outlet, a high purity phosphorus oxychloride gas leakage detection alarm, a video surveillance camera, a low liquid level detection alarm, an LED illuminating lamp, and an observation window.

An attachment for a hydrogen refueling port of a vehicle, the port designed according to the known SAE J2799 international vehicle standard. The attachment is designed to be incompatible with the supply of hydrogen to said vehicle. The attachment includes a nozzle for being connectable to the refueling port and a protruding handle, and at least one of the following features: i) a magnetic element; and ii) a locking device for reversibly locking onto a portion of the refueling port.

A gas monitoring system for detecting chemical substances in a gas comprising a Raman spectrometer comprising: an excitation source of light, a hollow core optical fiber having a longitudinal axis, a first longitudinal end, a second longitudinal end, an outer surface and an inner hollow core surface, the hollow core optical fiber being configured to: receive in its hollow core the gas to be monitored, receive at its first or its second longitudinal end light emitted by the excitation source of light, and transmit at its first or its second longitudinal end a Raman light when being illuminated by the received light. The system also includes a detector, and a transmission optical fiber coupled to the first longitudinal end and/or to the second longitudinal end of the hollow core optical fiber.

A method is provided for verifying integrity of a recirculation valve in a recirculation line of an LNG dispenser. The method includes: closing the recirculation valve and a fill valve in a supply line that supplies LNG; monitoring a mass of the LNG flowing through the recirculation line to ensure that the mass flowing therethrough is less than an acceptable threshold; and aborting any pending sales if the mass of the LNG flowing therethrough is not less than the acceptable threshold. According to another embodiment, a method is provided for verifying integrity of a vent valve in an LNG dispenser. The method includes: closing the vent valve and opening a fill valve in a supply line that supplies LNG; monitoring the pressure of the LNG within the fill hose to ensure that the pressure remains steady; and aborting any pending sales if the pressure does not remain steady.

A safety system for a storage tank. The storage tank includes a storage chamber configured to store a working fluid, a first skin forming the storage chamber, a second skin positioned radially outwardly of the first skin, an insulation cavity formed between the first skin and the second skin and a pressure sensor configured to measure a pressure in the insulation cavity. The safety system is configured to monitor a rate of change in the measured pressure and to determine that damage to the storage tank has occurred if the rate of change in the measured pressure is above a desired value.

A gaseous fuel storage system includes: one or more storage tanks, each having a first end and a second end, the first end of each tank having a connection fitting; a piping and valving assembly coupled to the connection fitting, wherein each of the one or more tanks is coupled to an outlet line through a remote shut off valve; a first cabinet surrounding the piping and valving assembly and a portion of the first end of the storage tanks; a detector disposed in the first cabinet which operable to detect the presence of hydrogen gas and generate a signal representative of a hydrogen gas concentration; and an electronic controller operably connected to the sensor apparatus and to the remote shut off valve, wherein the electronic controller is programmed to close all of the remote shut off valves in response to detection of a first predetermined concentration of hydrogen.