A liquid immersion sensor for a mobile device with at least two acoustic transducers is described. The liquid immersion sensor may include a signal generator having a signal generator output configured to generate a signal for transmission via a first acoustic transducer, and a signal receiver having a signal receiver input configured to receive a delayed version of the generated signal via a second acoustic transducer. The signal receiver includes a signal receiver output. The liquid immersion sensor includes a controller having a first controller input for receiving a reference signal and a second controller input coupled to the signal receiver output. The controller determines a time lag value between the reference signal and the delayed signal and generates a control output signal dependent on the phase difference. The control output signal indicates if the mobile device is immersed in liquid.

A method for determining multi-phase flow properties of a fluid is disclosed. The method includes measuring a first time for a first ultrasonic signal to be emitted from a first transducer into the fluid, reflected off an inner surface of the pipeline, and received back at the first transducer. Measuring a second time for the first ultrasonic signal to be emitted from the first transducer into the fluid and received at a second transducer. Calculating, using the first time and the second time, at least one of: a liquid to gas ratio, a fluid density, a gas holdup, a liquid holdup, and a fluid velocity of the fluid flowing through the pipeline.

A method for determining multi-phase flow properties of a fluid is disclosed. The method includes measuring a first time for a first ultrasonic signal to be emitted from a first transducer into the fluid, reflected off an inner surface of the pipeline, and received back at the first transducer. Measuring a second time for the first ultrasonic signal to be emitted from the first transducer into the fluid and received at a second transducer. Calculating, using the first time and the second time, at least one of: a liquid to gas ratio, a fluid density, a gas holdup, a liquid holdup, and a fluid velocity of the fluid flowing through the pipeline.

A cuvette for treating and characterizing water via ultrasonic waves and optical measurements comprises at least one ultrasonic transducer for treating said water by introducing at least one ultrasonic pulse into the water. The at least one ultrasonic pulse either varies parameters of the water, and/or moves and repositions particles within the water. The cuvette further comprises a spectrometry device for measuring spectral components of light and at least one light source for irradiating the water with irradiation light. The at least one of the parameters of the water is determined via: (a) measuring the spectral components of light prior to treating the water with said at least one ultrasonic transducer, (b) treating the water with said at least one ultrasonic transducer, (c) remeasuring the spectral components of light to get the difference in said spectral components of light, and (d) determining the value of the at least one parameter of the water based on the difference in said spectral components of light.

A cuvette for treating and characterizing water via ultrasonic waves and optical measurements comprises at least one ultrasonic transducer for treating said water by introducing at least one ultrasonic pulse into the water. The at least one ultrasonic pulse either varies parameters of the water, and/or moves and repositions particles within the water. The cuvette further comprises a spectrometry device for measuring spectral components of light and at least one light source for irradiating the water with irradiation light. The at least one of the parameters of the water is determined via: (a) measuring the spectral components of light prior to treating the water with said at least one ultrasonic transducer, (b) treating the water with said at least one ultrasonic transducer, (c) remeasuring the spectral components of light to get the difference in said spectral components of light, and (d) determining the value of the at least one parameter of the water based on the difference in said spectral components of light.

Aspects of the disclosure are directed to a obtaining a first plurality of signals associated with a fluid flow in a pipe, processing, by a processor, the first plurality of signals to obtain a first plot of power associated with first vortices in the fluid flow and a flow rate of the fluid flow in the pipe over a first flow rate range, determining, by the processor, that a maximum value of the power in the first plot corresponds to a maximum value of the flow rate included in the first flow rate range or that the power is increasing as a function of the flow rate towards an end of the first plot, and based on said determining, multiplying, by the processor, values of the first flow rate range to obtain a second flow rate range.

A multiphase flowmeter for detection of fluid flow by monitoring of vortex frequency or perturbation time of flight. The flowmeter includes a bluff body to facilitate formation of vortices during a consistent phase of a flowing fluid. Thus, monitoring frequency of the vortices may be employed to ascertain flowrate. Further, the bluff body may also facilitate formation of perturbations during transitioning phase of the fluid and include perturbation sensors at multiple known locations along the flow-path. Thus, analysis of perturbation detection times at the different locations may be used to ascertain flowrate even in the absence of vortices.

An imaging system for measuring flow rates of the individual phases of a multiphase flow and for providing images of the multiphase flow, wherein the imaging system is adapted to also measure the thickness of deposits on the internal wall of a pipe, and to a method for analyzing a multiphase flow flowing through a pipe using the imaging system.

An imaging system for measuring flow rates of the individual phases of a multiphase flow and for providing images of the multiphase flow, wherein the imaging system is adapted to also measure the thickness of deposits on the internal wall of a pipe, and to a method for analyzing a multiphase flow flowing through a pipe using the imaging system.

A method of monitoring cleaning of an apparatus for applying a coating medium to an object, the apparatus including a rotatable deflecting element for atomizing the coating medium; and a cleaning medium line for conducting a cleaning medium to the deflecting element; where the method including commanding performance of a cleaning operation including delivery of the cleaning medium through the cleaning medium line towards the deflecting element while rotating the deflecting element; collecting operational values of at least one operational parameter of the apparatus for the cleaning operation; comparing the operational values with reference values of the at least one operational parameter for the cleaning operation; and determining whether the cleaning operation was successful or unsuccessful based on the comparison. A method of cleaning an apparatus for applying a coating medium to an object is also provided.