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 nozzle adapter assembly is provided for adapting use of nozzles on liquid dispensing pumps with test and measurement equipment such as liquid provers, test measures and liquid proving systems. The adapter can be used with automatic shut-off nozzles through which the liquid may normally be dispensed.

A system for controlling pressure associated with a volume may comprising a pump and piston/cylinder assembly, both in fluid communication with a volume of a closed fluid system. In addition, the system may comprise an actuator operatively connected to the actuator and pump to control fluid flow and pressurization or depressurization of the volume and/or fluid flow system. The pump is activated to generate a first pressure level of the closed fluid system and when this first pressure level is reached the actuator is activated to drive the piston/cylinder assembly to reach a pressure set point from the first pressure level. The system may be used as a calibrator or a pressure controller for pressure differentials, gauge pressure or absolute pressure.

A method is for calibrating a peristaltic pump, and for dispensing a quantity of liquid by a peristaltic pump. A device for producing sterile preparations can execute the methods.

A method is for calibrating a peristaltic pump, and for dispensing a quantity of liquid by a peristaltic pump. A device for producing sterile preparations can execute the methods.

Gas insensitive systems and methods for controlling the mass flow rate of a gas through a primary conduit are disclosed. The method includes producing, in a secondary conduit, an assessment flow that has a changing pressure; calculating a first measure of a flow rate of the assessment flow based upon a rate-of-change of the pressure of the assessment flow; and measuring the assessment flow with a mass flow meter that is affected by the composition of the gas to produce a second measure of the assessment flow. An adjustment signal is generated based upon a difference between the first measure and the second measure, and a gas-corrected flow signal is generated by adjusting a measured-flow signal of a mass flow controller with the adjustment signal. The gas-corrected flow signal is used by the mass flow controller to control a flow rate of the gas through the primary conduit.

A device for cleaning and/or disinfecting medical equipment. The device including: a storage container in which a liquid cleaning agent is provided; a metering pump coupled fluidically to the storage container, wherein the metering pump is configured for delivering cleaning agent from the storage container to provide cleaning and/or rinsing liquid for cleaning and/or disinfecting the medical equipment; and a calibrating device is fluidically coupled to the metering pump, the calibrating device comprises a measuring column, wherein the measuring column provides a calibration volume for calibrating a delivery rate of the metering pump.

Devices and methods for mass flow verification are provided. A mass flow verifier includes a chamber configured to receive a fluid, a critical flow nozzle upstream of the chamber, a chamber valve, a downstream valve, and a bypass valve. The chamber valve is configured to selectively enable fluid flow from the critical flow nozzle to the chamber. The downstream valve is configured to selectively enable fluid flow from the chamber to a downstream location. The bypass valve is configured to selectively enable fluid flow from the critical flow nozzle to a dump location. The mass flow verifier further includes a controller configured to verify flow rate of the fluid based on a rate of rise in pressure of the fluid as detected by a pressure sensor in the chamber.

A method of determining a flow rate of a liquid includes collecting the liquid in a container; monitoring the collection of liquid in the container with respect to time; and determining a first value of the flow rate based on the monitored collection of liquid in the container with respect to time. An apparatus for determining a flow rate of a liquid is also provided.

Provided are systems and methods for line volume calibration, and measurement of fluid samples delivered to an interrogation point. In various embodiments, a known fluid volume comprising a sample line fluid and a secondary fluid is delivered to a fluid boundary sensor. The fluid boundary sensor assists in determining the position of the boundaries between the various fluids, and the positions of these boundaries are used to determine the sample line fluid volume.