Flow sensors are provided that can monitor flow conditions. The flow sensor includes a gauge that provides a first level of information about flow through the sensor, and an indicator associated with the gauge that can provided a second level of information about flow through the sensor. The indicator might be in the form of a dial that can rotate about the gauge and might include a locked position for monitoring flow and an unlocked position to rotate the dial about the gauge to reposition the dial. A twisted shaft with varying twist rate is provided to convert linear motion to rotational motion for the gauge.

A system that controls the flow rates of a plurality of split channels provided parallel to each other to a certain flow split ratio includes: a flow split ratio calculation unit that, in order to be able to diagnose whether a system abnormality that affects the flow split ratio is occurring, calculates a ratio of output values of flow rate sensors obtained by allowing, while fluid control valves of different split channels are closed, fluids to flow in these split channels as an actual flow split ratio; a reference flow split ratio storage unit that stores a reference flow split ratio serving as a reference for the actual flow split ratio; and an abnormality diagnosis unit that compares the actual flow split ratio and the reference flow split ratio, and diagnoses a system abnormality.

A system that controls the flow rates of a plurality of split channels provided parallel to each other to a certain flow split ratio includes: a flow split ratio calculation unit that, in order to be able to diagnose whether a system abnormality that affects the flow split ratio is occurring, calculates a ratio of output values of flow rate sensors obtained by allowing, while fluid control valves of different split channels are closed, fluids to flow in these split channels as an actual flow split ratio; a reference flow split ratio storage unit that stores a reference flow split ratio serving as a reference for the actual flow split ratio; and an abnormality diagnosis unit that compares the actual flow split ratio and the reference flow split ratio, and diagnoses a system abnormality.

A phase power device, comprising: a circulation pipe (1) and a preset number of phase power control components (2), wherein the circulation pipe (1) is used to provide a channel for fluid circulation flow, and the preset number of phase power control components (2) are disposed on the circulation pipe (1) and used to drive fluid in the circulation pipe (1) to circulate and flow. Further provided is a fluid experiment system, comprising the phase power device. The phase power device and the fluid experiment system may enable the fluid to meet a set flow requirement during the experiment, thus reducing the use of auxiliary equipment, and reducing experiment costs.

A system may include a driver circuit configured to receive a clock signal. The system may also include a first tuned circuit and a second tuned circuit. The first tuned circuit and the driver circuit may be collectively tuned according to a first frequency range. The first tuned circuit may be configured to be active when a rate of the clock signal is within the first frequency range and to be inactive when the rate is outside of the first frequency range. Further, the second tuned circuit and the driver circuit may be collectively tuned according to a second frequency range that is different from the first frequency range. The second tuned circuit may be configured to be active when the rate is within the second frequency range and to be inactive when the rate is outside of the second frequency range.

A pressure gauge of a fluid pressure system includes a measurement unit, a case, a display unit, and an adapter. The adapter includes an attachment hole. The case includes an attachment convex portion which can be fitted into the attachment hole. The display unit includes a display surface oriented in a direction intersecting an axis of the attachment convex portion. The attachment convex portion and the attachment hole have a fitting structure capable of changing the relative position between the attachment convex portion and the adapter in the circumferential direction about the axis of the attachment convex portion.

A utility flow meter including a valve having a pressure vessel providing a flow path from a meter inlet to a meter outlet through the valve is magnetically driven. The meter includes a valve member positioned within the valve in the pressure vessel for movement between an open position allowing normal flow through the flow meter and a flow restriction position in which flow through the flow meter is limited to less than the normal flow and an electrically operable control device for controlling movement of the valve member including a dry-side magnet assembly and a wet-side magnet assembly. The electrically operable control device receives command signals to rotate the dry-side magnet assembly to move the valve member and thereby increase or decrease flow through the metering chamber.

Various implementations described herein are directed to a petrochemical measurement system. A remote terminal unit includes a network data server. A human machine interface may be an autonomous network data client in communication with the remote terminal unit. The human machine interface may include: a memory having configuration parameter software stored thereon; a user interface configured to receive configuration parameter input using the configuration parameter software; and a processor configured to send the configuration parameters received from the user interface of the HMI to the remote terminal unit.

An apparatus that includes a chemical injection management system. The chemical injection management system may include an interface configured to couple the chemical injection management system to a mineral extraction system. In addition, the chemical injection management system may include an ultrasonic flow meter.

An apparatus that includes a chemical injection management system. The chemical injection management system may include an interface configured to couple the chemical injection management system to a mineral extraction system. In addition, the chemical injection management system may include an ultrasonic flow meter.