A flow rate control apparatus includes an adjustable valve receiving a flow of a gas. A conduit has a first end coupled to the valve. The conduit includes a translucent or transparent portion thereof whose longitudinal axis is adapted to be aligned with a force of gravity with a visual scale being disposed on the translucent/transparent portion. The visual scale is indicative of gas flow rates moving through the conduit. A ball disposed in the translucent/transparent portion has an outer diameter that is less than an inner diameter of the translucent/transparent portion. A tube support, coupled to the second end of the conduit, is adapted to hold a gas detection tube wherein the gas flow flowing around the ball is introduced into the gas detection tube from the second end of the conduit.

A beam coupling includes a spring extending between top and bottom plates to transmit rotational motion while providing longitudinal compressibility and accommodating axial misalignment without loss of effective and efficient operation; a fluid flow control system may include a beam coupling operatively disposed between a motor and a valve.

A beam coupling includes a spring extending between top and bottom plates to transmit rotational motion while providing longitudinal compressibility and accommodating axial misalignment without loss of effective and efficient operation; a fluid flow control system may include a beam coupling operatively disposed between a motor and a valve.

The invention provides an apparatus and method for measuring fluid flow rates. The apparatus comprises a meter body comprising a throughbore with a fluid flow path and a flow displacement member. The apparatus also provides a sleeve slidably mounted within the fluid flow path. The sleeve is configured to be movable between at least two axial positions within the fluid flow path to select a predetermined flow rate measurement range for the flow measurement apparatus.

The present invention relates to a power supply system for video cameras (2) and for protection cases (1) for video cameras. The system comprises a first device (13), called as powered device since it receives power from a remote device, able to split a supply voltage (131) and a data signal (130) from a power supply input line (18). A plurality of power supply lines (14a-14e) are connected to a first output of the powered device (13) and they supply a plurality of electric components (7,8,9,10) via the supply voltage (131) extracted by the powered device (13). The system further comprises a power supply equipment (19) connected to the powered device (13) so as to receive as input the supply voltage and the data signal split by the powered device. A case and a method for powering a video camera are also described.

A utility flow meter and a method for measuring a flow of a liquid through a flow conduit having a liquid sensing arrangement, a display device, and a display mode controller for controlling the display mode. The display mode controller is configured to control the display mode based on a first display mode when the liquid presence criterion is fulfilled and a second display mode when the liquid presence criterion is not fulfilled. The first display mode consists of at least one flow representation, and the second display mode consists of at least one further representation.

A utility flow meter and a method for measuring a flow of a liquid through a flow conduit having a liquid sensing arrangement, a display device, and a display mode controller for controlling the display mode. The display mode controller is configured to control the display mode based on a first display mode when the liquid presence criterion is fulfilled and a second display mode when the liquid presence criterion is not fulfilled. The first display mode consists of at least one flow representation, and the second display mode consists of at least one further representation.

Flow sensors are provided that can provide both leak detection and flow monitoring. The flow monitoring enables a determination whether there are blockages or leaks in a fluid system during normal operation of the system. The leak detection enables detection of leaks when the system is shut off. The flow sensors can use a frusto-conical flow guide to provide a more compact flow sensor.

A system includes a pipeline and a valve mechanism defining an adjustable orifice. An actuator is coupled to the valve mechanism and operable adjust a size of the adjustable orifice. An upstream pressure sensor senses pressure of the fluid and an adjustment controller is communicatively coupled to the actuator and the upstream pressure sensor, wherein the adjustment controller actuates the actuator to adjust the size of the adjustable orifice based on data received from the upstream pressure sensor. A differential pressure sensor measures differential pressure across the adjustable orifice and a temperature sensor senses temperature of the fluid downstream from the adjustable orifice. A calculation controller is communicatively coupled to the adjustment controller, the differential pressure sensor, and the temperature sensor, wherein the calculation controller calculates flow rate of the fluid based on data received from the differential pressure sensor, the temperature sensor, and the adjustment controller.

A system includes a pipeline and a valve mechanism defining an adjustable orifice. An actuator is coupled to the valve mechanism and operable adjust a size of the adjustable orifice. An upstream pressure sensor senses pressure of the fluid and an adjustment controller is communicatively coupled to the actuator and the upstream pressure sensor, wherein the adjustment controller actuates the actuator to adjust the size of the adjustable orifice based on data received from the upstream pressure sensor. A differential pressure sensor measures differential pressure across the adjustable orifice and a temperature sensor senses temperature of the fluid downstream from the adjustable orifice. A calculation controller is communicatively coupled to the adjustment controller, the differential pressure sensor, and the temperature sensor, wherein the calculation controller calculates flow rate of the fluid based on data received from the differential pressure sensor, the temperature sensor, and the adjustment controller.