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.

Various methods are described for evaluating fuel pump data and determining a fuel pump flow rate. One example method may comprise receiving fuel pump information associated with a fuel pump. The method may further comprise updating previous fuel pump information associated with the fuel pump based on the received fuel pump information. Additionally, the method may comprise detecting an alarm condition associated with the fuel pump based at least in part on the updated fuel pump information. Similar and related methods, apparatuses, and computer program products are also provided.

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 fuel dispenser includes a fuel nozzle configured to be connected to a vehicle fuel system, fuel piping configured to transfer fuel from at least one fuel storage tank associated with the fuel dispenser through the fuel nozzle into the vehicle fuel system, and a fraud detection valve apparatus. The fraud detection valve apparatus includes a cutoff valve configured to selectively prevent flow of fuel, a flow sensor configured to sense a flow of fuel, and processing circuity. The processing circuitry is configured to receive an indication of flow of fuel through the fuel flow control valve apparatus, determine an authorization status, and in response to a determination of no authorization during flow, cause the cutoff valve apparatus to close.

Systems and methods are provided for controlling maintenance of a fuel dispenser. In one exemplary embodiment, a system is provided having a fuel dispenser that includes an electronics module having a data processor, a remote enterprise server in communication with the electronics module, and a remote code processor in communication with the remote enterprise server. The data processor is configured to determine an authorization password based on data characterizing the fuel dispenser, to receive a remote password that is generated by the remote code processor based on the fuel dispenser data, to determine that the remote password matches the authorization password, and to cause the fuel dispenser to enter a maintenance mode.

A portable fluid monitoring controller tester system for fluid monitoring equipment includes a control panel, electrical interfaces, and associated circuitry for simulating the fluid overfill sensors and other features of a trailer. The tester is a self-contained device that meets or exceeds various safety standards applicable to operating in an explosive environment. The tester may be powered, at least partially, by the fluid monitoring controller to which it is connected or from another power source, such as a battery. The tester has intrinsically safe outputs, and is configured to simulate different types of sensor systems found in fuel tanker trailers, including 2-Wire Optical, 5-Wire Optical, and Thermistor sensors. The tester is further configured to simulate ground circuits and the truck identification module (T.I.M.) of the fuel tanker trailer. The tester includes an enclosure that is impact and temperature resilient, and provides protection against windblown dust, rain and splashing water.

A fuel dispensing system includes a fuel tank adapted to contain a quantity of fuel. A fuel dispenser in is fluid communication with the fuel tank via piping. A pump is operative to transfer fuel from the fuel tank to the fuel dispenser. A corrosive detection assembly operative to identify presence of a corrosive substance in the fuel is also provided. The corrosive detection assembly has at least one thermoelectric detector positioned to be in contact with fuel vapor in the fuel dispensing system, the thermoelectric detector producing a detector signal indicating presence of the corrosive substance. Electronics are in electrical communication with the thermoelectric detector, the electronics being operative to interpret the detector signal and produce an output if the corrosive substance is present. The at least one thermoelectric detector may comprises a plurality of thermoelectric detectors at different locations in the fuel dispensing system.

Fluid level measurements for the shared tank and outflow information provided by calibrated flow meters corresponding to dispensing stations connected to the shared tank may be used to derive a filled volume model for the tank as a function of fluid level. Subsequently, a filled volume change for a shared tank over a selected time interval may be determined from pre-change and post-change fluid level measurements. The change in filled volume may be compared with the total fluid flow over the selected time interval as indicated by the flow meters of active dispensing stations. If the filled volume change for the tank is substantially different than the total fluid flow indicated by the flow meters, the flow meters may be collectively adjusted to provide a more accurate indication of the filled volume change in the shared tank.

A mechanical system for calibration during a chemical feed process includes a ball valve that includes three openings. The ball valve is in communication with a lever, which when turned to a fill position, allows the filling of a drawdown cylinder for calibration. The ball valve automatically returns to its original default position within about a minute with a spring force automatically pushing it back to its start position.

A mechanical system for calibration during a chemical feed process includes a ball valve that includes three openings. The ball valve is in communication with a lever, which when turned to a fill position, allows the filling of a drawdown cylinder for calibration. The ball valve automatically returns to its original default position within about a minute with a spring force automatically pushing it back to its start position.