A method and apparatus for mixing additives into a fluid fuel at a predictable concentration. The method involves taking a sample of the fuel; mixing the additive into the sample in metered proportions; testing the sample to determine that the correct amount of additive is present; storing the remaining fuel until it is time for the fuel to be used; and mixing the additive into the remainder of the fuel in the same metered proportions.

Processes of and apparatus for supplying to an operation a liquid that is applied at the operation comprise delivering to the operation from a holding vessel a liquid of a prescribed composition comprising more than one constituent, whereby a spent liquid having a composition different from the prescribed composition can be formed at the operation. The spent liquid is returned to the holding vessel for redelivery to the operation. The composition of the liquid at the holding vessel can be continuously analyzed and the amount of each constituent of the liquid required to be added to the liquid at the holding vessel to provide a liquid of the prescribed composition determined and that amount of each constituent delivered to the holding vessel. A plurality of operations and respective holding vessels can be involved. The operations can comprise metalworking operations and the liquid of a prescribed composition can comprise a coolant.

An apparatus for producing a blended alcoholic beverage includes a blender having first and second conduits for carrying respective first and second beverage ingredients, and corresponding flow-control valves for each conduit. These first and second conduits connect to a third conduit to form a blended stream that comprises the first ingredient and the second ingredient. An infrared sensor measures infrared absorption in the blended stream and provides a first signal to a controller that controls the flow-control valves based at least in part on the first signal.

Embodiments of the present invention relate to a method and apparatus for mixing additives into a fluid fuel at a predictable concentration. The method comprises: taking a sample of the fuel; mixing the additive into the sample in metered proportions; testing the sample to determine that the correct amount of additive is present; storing the remaining fuel until it is time for the fuel to be used; and mixing the additive into the remainder of the fuel in the same metered proportions.

A method and apparatus for automatically controlling partial pressure of oxygen in the breathing loop of a rebreather diving system. A diver may adjustably select a control parameter to maintain partial pressure of oxygen at a setpoint that varies with ambient pressure and is within a range between a maximum safe partial pressure of oxygen at depth and a minimum safe partial pressure of oxygen for the purpose of biasing the performance of the rebreather either towards minimizing gas venting from the rebreather breathing loop or minimizing decompression time. A method and apparatus for managing and monitoring the use of dive resources in comparison with a target dive time specified by the diver, calculating and indicating remaining dive time based on dive resource values and calculating and indicating dive resource values required to meet preselected dive resource end values and dive requirements.

An apparatus for controlling a level of oxygen in a closed environment from an oxygen supply having an oxygen sensor for detecting the level of oxygen in the closed environment. The apparatus has a plurality of relays in communication with the sensor. The apparatus has a valve in communication with the relays and the oxygen supply which is automatically opened with the relays without human interaction, monitoring and adjustment to release oxygen from the oxygen supply into the environment when the level of oxygen in the environment goes below a first predetermined level and which is automatically closed with the relays without human interaction, monitoring and adjustment to stop oxygen from being released from the oxygen supply into the environment when the level of oxygen in the environment goes above a second predetermined level. A method for controlling a level of oxygen in a closed environment from an oxygen supply. A refuge chamber.

Various methods and systems are provided for monitoring and control of soil conditions. In one example, among others, a method includes obtaining one or more aqueous sample from at least one suction probe within a soil substrate and analyzing the one or more aqueous sample to determine a chemical composition of the soil substrate. Amounts of an additive may be determined to adjust the chemical composition of the soil substrate. In another example, a method includes installing at least one suction probe within a soil substrate; drawing a vacuum to induce hydraulic conduction of at least one aqueous solution from the soil substrate; extracting one or more aqueous sample; and analyzing the one or more aqueous sample to determine a chemical composition.

The invention relates to a method of controlling a smoke generator. The smoke generator is adapted to be connected to a supply of a pressurized gas and a supply of a smoke liquid and further comprises a valve to regulate the pressure of the gas, a fluid driving means, a mixing unit for mixing the smoke liquid and the gas, and a heat exchanger heating the mixture of the pressurized gas and the smoke liquid to vaporize the smoke liquid and form a smoke upon ejection into surrounding air. The control method according to the invention then comprises the steps of receiving a smoke density parameter indicative of a desired amount of smoke to be generated by the smoke generator, measuring a gas pressure at a position between the valve and the heat exchanger, and using these parameters in controlling the valve. The invention further relates to a smoke generator arranged for performing the control method.

Embodiments of the present invention relate to a method and apparatus for mixing additives into a fluid fuel at a predictable concentration. The method comprises: taking a sample of the fuel; mixing the additive into the sample in metered proportions; testing the sample to determine that the correct amount of additive is present; storing the remaining fuel until it is time for the fuel to be used; and mixing the additive into the remainder of the fuel in the same metered proportions.

An apparatus for filling a vessel with a multicomponent filling product includes a filler having at least one filling unit set up to introduce the filling product into the vessel, and a filler tank set up for intermediate buffering of the filling product and in fluid connection with the filling unit via a product conduit to supply the filling unit with the filling product; and a mixer set up to blend the filling product from at least two filling product components, wherein the mixer has a circulation conduit; and the mixer has at least one dosage branch set up to introduce one filling product component into the circulation conduit, wherein the mixer has a heat exchanger set up to adjust the temperature of the filling product in the circulation conduit.