A measuring vessel (1) for determining the accuracy with which a liquid fuel dispenser dispenses liquid fuel comprises a neck (4) of transparent material. A primary arcuate panel (16) having three primary graduated scales (14) corresponding to three different kinds of liquid fuels is secured to the neck (4). Primary graduations (17) of the respective primary graduated scales (14) indicate the level to which the meniscus of actual volumes of the respective liquid fuel dispensed at the temperatures corresponding to the primary graduations (17) should rise so that the energy content of the actual volumes of the respective liquid fuels dispensed is equal to the energy content of a predefined calibration volume of the corresponding liquid fuel at a predefined reference temperature typically of 15 C. A secondary arcuate panel (20) having a secondary graduated scale (22) thereon is slideable relative to the primary graduated scales (17) so that a reference graduation (23) of the secondary graduated scale (22) can be aligned with an appropriate one of the primary graduations (17) of an appropriate one of the primary graduated scales (14), in order that the amount by which the actual volume of liquid fuel dispensed exceeds or falls below the actual volume which should have been dispensed.

An automated liquid inventory monitoring and inventory reconciliation system. The system uses a liquid densitometer to precisely measure the density of liquid being dispensed. This allows the system to account for the significant temperature-induced volume variations existing in common liquids such as gasoline. In the preferred embodiments, a fuel inventory processor tracks the quantity of fuel loaded into the tank and the quantity of fuel dispensed to maintain an ongoing computation of the quantity of fuel that should be present in the tank. An accurate tank depth measurement device is also employed. The processor compares the tank depth measurement to the computed quantity of fuel in the tank and uses the values to create an updated tank strapping chart.

A hydrocarbon dispensation line pressure sensor adapted to work without requirement of a separate closed valve. The system closes the dispensation line upstream via an isolation valve. The pressure can be sensed from the dispensation line through the valve to provide dispensation line pressure. A channel in fluid communication with the dispensation line may be provided to allow pressure measurement apart from the main dispensation line. Further, a method for measuring the pressure drop profile of a dispensation line and various methods to determine the pressure loss due to leaks in dispensation line.

A fuel contamination detection system includes a fuel quality analyzer, a multiway valve, and a controller. The multiway valve includes a first inlet, a second inlet, and an outlet. The multiway valve also may include a switching device. The controller is electrically coupled to the analyzer. The controller may be coupled to the switching device, if present. Fuel is flowed through the fuel quality analyzer and an output current is measured to determine whether the fuel includes impurities. The controller is operable to signal a fuel dispensing system to dispense fuel if the fuel is sufficiently clean or cease dispensing fuel if the fuel is impure.

Data characterizing a fuel storage facility can be received from one or more of a plurality of sensors disposed in the fuel storage facility. A fuel leak prediction for the fuel storage facility can be determined by a server, based on the received data, and further based on at least one predictive model that predicts whether a fuel leak exists in the fuel storage facility. The fuel leak prediction can be provided by the server. Related apparatus, systems, methods, techniques, and articles are also described.

A system is provided for dispensing a hair dye formulation into container, comprising: a conveyer belt configured to transport the customer container along a fill line; a plurality of dispensing mechanisms, each connected to a respective bulk containers having a different bulk hair dye color, the plurality of dispensing mechanisms being disposed over a conveyer belt along the fill line; and circuitry configured to receive a plurality of formulas for filling a respective plurality of receiving containers with one or more bulk hair dye colors from among the plurality of bulk containers having the different bulk hair dye color, and control each of the plurality of dispensing mechanisms to perform a dispensing operation to dispense an amount of bulk hair dye color or to not perform a dispensing operation at a time when each of the receiving containers are transported to each of the plurality of dispensing mechanisms along the fill line, wherein the circuitry is configured to adjust a sequence of the receiving containers to be filled in the fill line based on the formulas and a sequence which results in a minimum time to complete filling the receiving containers in the fill line.

In one aspect, data characterizing a fuel storage facility can be received from a sensor in operable communication with the fuel storage facility. An estimate of meter drift of a flow meter of a fuel dispenser in fluid communication with the fuel storage facility can be determined based on the received data. The estimate of meter drift can be determined based on at least one predictive model that predicts whether a calibration parameter characterizing a calibration of the flow meter has deviated from a predetermined flow meter calibration parameter. The estimate of meter drift can be provided.

A method for calibrating a filling system is disclosed. In a first calibration step, a calibration of a calibration variable of a first flow or level measuring device is performed at a first calibration point. In a first deviation determination step, the first control and evaluation unit of the measuring device determines an average deviation of the calibration variable from a desired value. In a first correction step, the first control and evaluation unit corrects a calibration parameter taking into account the determined deviation. In a first transmission step, the first control and evaluation unit transmits the determined deviation and/or the corrected calibration parameter to the second control and evaluation unit. In a first adaptation step, the second control and evaluation unit corrects a calibration parameter at a first calibration point, taking into account the deviation transmitted by the first control and evaluation unit or the transmitted calibration parameter.

A system for determining fuel dispenser metrological compliance at multiple fueling sites each having a plurality of fuel dispensers. The system comprises a cloud-based computing resource in operative communication with the fueling sites. The cloud-based computing resource is operative to receive a compliance request from a compliance entity for metrological information from a selected fuel dispenser, validate the compliance request, and provide compliance data to the compliance entity.

A tank level and flow rate measurement system and method is described for use with a chemical injection pump and a chemical storage tank. The system includes a device comprising a measurement column of known volume, an upper pressure sensor and a lower pressure sensor, a valve for controlling fluid filling of the device from the storage tank, and a fluid outlet connected to the pump, a vent tube which extends above the measurement column and the upper pressure sensor; and a controller operably connected to the upper pressure sensor and the lower sensor, configured to receive pressure measurements and determine a base state where both upper and lower sensors read atmospheric pressure only and a measurement state where the upper sensor reads atmospheric pressure only and the lower sensor reads a pressure based on fluid level in the measurement column.