A gas meter with a rated maximum flow capacity of greater than 3,000 CFH (Cubic Feet per Hour)—for example, between 3,500 CFH and 7,000 CFH—is provided with 2-inch flange connectors. One or more undercuts are provided in the meter body to promote satisfactory performance in terms of, for example, differential pressures at the meter inlet and outlet.

A system for monitoring flow conditions of fluid flowing from a product container through a solenoid pump. The system includes at least one solenoid pump comprising a solenoid coil, which, when energized, produces a stroke of the solenoid pump, at least one product container connected to the at least one solenoid pump wherein the at least one solenoid pump pumps fluid from the at least one product container during each stroke, at least one PWM controller configured to energize the at least one solenoid pump, at least one current sensor for sensing the current flow through the solenoid coil and producing an output of the sensed current flow, and a control logic subsystem for controlling the flow of fluids through the solenoid pump by commanding the PWM controller and for monitoring the current through the solenoid pump by receiving the output from the current sensor, wherein the control logic subsystem uses the measured current flow through the solenoid coil to determine whether the stroke of the solenoid pump is functional.

A hot melt adhesive system includes an adhesive supply for receiving solid or semi-solid hot melt adhesive, and a heater associated with the adhesive supply for melting the solid or semi-solid hot melt adhesive into liquid hot melt adhesive. An adhesive tracking system monitors an output of the liquid hot melt adhesive, and includes a flow meter having a flow inlet and a flow outlet. The flow meter measures an amount of the adhesive flowing out of the flow outlet. A product detector may be used to sense a presence of a product to which the adhesive is applied. A controller then determines the total amount of the liquid adhesive dispensed and the average amount of liquid adhesive dispensed per product.

A hot melt adhesive system includes an adhesive supply for receiving solid or semi-solid hot melt adhesive, and a heater associated with the adhesive supply for melting the solid or semi-solid hot melt adhesive into liquid hot melt adhesive. An adhesive tracking system monitors an output of the liquid hot melt adhesive, and includes a flow meter having a flow inlet and a flow outlet. The flow meter measures an amount of the adhesive flowing out of the flow outlet. A product detector may be used to sense a presence of a product to which the adhesive is applied. A controller then determines the total amount of the liquid adhesive dispensed and the average amount of liquid adhesive dispensed per product.

A liquid pumping device (1) for beverage dispenser comprising:-a housing (2) with a liquid inlet (3) and a liquid outlet (4);- a gear pump (5) positioned in the housing with the liquid inlet communicating with the gear pump; wherein a flowmeter (6) is fluidly positioned in the housing (2) preferably between the gear pump (5) and the liquid outlet (4).

A liquid pumping device (1) for beverage dispenser comprising:-a housing (2) with a liquid inlet (3) and a liquid outlet (4);- a gear pump (5) positioned in the housing with the liquid inlet communicating with the gear pump; wherein a flowmeter (6) is fluidly positioned in the housing (2) preferably between the gear pump (5) and the liquid outlet (4).

A rotary gas flow meter comprising a pair of three-toothed rotors, each of which has the shape of a double helical gear, wherein the first rotor is a mirror reflection of the second rotor, and the rotors are adapted to rotate in opposite directions; moreover, the flow meter comprises a body sealing the rotors forming measurement chambers, formed between the outer surfaces of the rotors and the inner surface of the body. The rotary gas flow meter further comprises the measurement chambers have strictly defined volume, and a geometry of rotors is adapted to provide an internal balance of axial forces. The rotors are adapted not to contact each other, and the rotors are synchronised via an external module synchronising the rotation of the rotors.

A rotary gas flow meter comprising a pair of three-toothed rotors, each of which has the shape of a double helical gear, wherein the first rotor is a mirror reflection of the second rotor, and the rotors are adapted to rotate in opposite directions; moreover, the flow meter comprises a body sealing the rotors forming measurement chambers, formed between the outer surfaces of the rotors and the inner surface of the body. The rotary gas flow meter further comprises the measurement chambers have strictly defined volume, and a geometry of rotors is adapted to provide an internal balance of axial forces. The rotors are adapted not to contact each other, and the rotors are synchronised via an external module synchronising the rotation of the rotors.

A gas meter is configured for diagnostics using differential pressure (DP) measurements. The configurations include executable instructions to actively manage the DP sensor. These instructions active the DP sensor only during stable flow and, where applicable, for a defined test time period. This feature manages power consumption to maintain battery life with acceptable standards or regulations.

A working condition monitoring system for a positive displacement rotary flow meter determines flow rate and differential pressure information for logging to determine a history of such data for a meter in the field. Deviation from good working data established for the meter model may be used such as to indicate maintenance and/or repair needs. Mechanical or other wear in a meter may lead to higher differential pressure measures for a given flow rate (or a lower measured flow rate for a given differential pressure) than is true for a meter in good working order. A corrective factor responsive at least to a current different pressure may be applied to correct a measure of flow rate that is determined in response to a measure of impeller rotation to account for additional flow of gas through the meter that is not driving the impeller(s).