A milk meter for measuring a flow rate of a milk flow with an inlet and an outlet a liquid flow path from the inlet to the outlet, a stabilization chamber in the liquid flow path and a float in the stabilization chamber configured to float on milk the milk meter is configured so a level of milk in the stabilization chamber depends on the flow rate of the milk flow, and is provided with a magnetic unit in the stabilization chamber, the magnetic field varies in a height direction of the stabilization chamber, an electronic measuring unit is arranged in the float for measuring the strength of the magnetic field, the strength is a measure of the height within the stabilization chamber at which the float is floating on the milk and the strength of the magnetic field is a measure of the flow rate of the milk flow.

Provided is an indication type level indicator including a total reflection prism provided on a float buoyant in the indication type level indicator so that, when laser is irradiated from an upper portion of the float, the laser is scattered by the total reflection prism and thus level legibility is improved. The indication type level indicator includes a chamber filled with a fluid and including a reading portion through which a level of the fluid is measured; the float provided in the chamber and including a material buoyant on the fluid moving vertically in the chamber along with the fluid; the total reflection prism provided on the float and configured to scatter light; and a laser module configured to irradiate laser to the total reflection prism so that the laser irradiated from the laser module is scattered by the total reflection prism to the reading portion.

Embodiments of a system and method for providing a float-based sensor are disclosed. Embodiments of the system and method provide a sealed pipe or tube, also referred to as a barrier chamber, that is located inside a tank (or body of water) to measure a fluid level in the tank, such as a fuel tank, an oil tank, a chemical tank, a water tank, and the like. No fluid is able to penetrate the interior of the sealed pipe to avoid any electrical, mechanical, or chemical problems, or degradation. Embodiments of the system and method use a float having a magnet that magnetically couples to a target located within the barrier chamber's interior. The movement of the target is constrained to one dimension, allowing it to move up and down as the fluid level in the tank (or body of water) moves the magnetically coupled float up and down.

A water level detection method, device, equipment, storage medium and system, which are applied to a respiratory humidification apparatus, the respiratory humidification apparatus including a humidification chamber that includes a float, where the method includes: obtaining a float position image captured by a current camera; performing a grayscale processing on the float position image to obtain a current grayscale image data; generating a grayscale reference line and a grayscale image curve based on the current grayscale image data, where the grayscale image curve is a relationship curve between the current grayscale image data and a height value of the humidification chamber; determining a height value of the float according to a relative position relationship between the grayscale reference line and the grayscale image curve.

A liquid preparation method is provided. The method includes measuring, with a detection member, a quantity of a liquid stored in a liquid tank by emitting a detection signal toward a floating member positioned in a tube. The tube extends in a height direction of the liquid tank and fluidly connects to two connecting ports of the liquid tank that are located at opposite sides of a surface of the liquid, and the position of the floating member in the tube varies according to a level of the liquid in the liquid tank. The method also includes regulating the liquid in the liquid tank in response to the quantity of the liquid in the liquid tank.

The disclosure discloses a liquid level detection apparatus, including a floater and a floater accommodating portion, wherein the floater moves in the floater accommodating portion in a vertical direction; an upper clamping portion and a lower clamping portion are provided on the floater in the vertical direction, a moving groove is formed in the floater accommodating portion, the moving groove extends in the vertical direction, and the upper clamping portion and the lower clamping portion move in the moving groove in the vertical direction; and a clamping groove is formed in the moving groove extending along a horizontal direction, and when the liquid level detection apparatus inclines, the upper clamping portion offsets into the clamping groove to play a limiting role, such that the floater not easily be sucked by a suction force to block a suction port, thereby avoiding resulting in the phenomenon that an alarm is given when the water is not full in fact. The disclosure further discloses a sewage tank including the liquid level detection apparatus, and a cleaning device including the sewage tank.

The disclosure discloses a liquid level detection apparatus, including a floater and a floater accommodating portion, wherein the floater moves in the floater accommodating portion in a vertical direction; an upper clamping portion and a lower clamping portion are provided on the floater in the vertical direction, a moving groove is formed in the floater accommodating portion, the moving groove extends in the vertical direction, and the upper clamping portion and the lower clamping portion move in the moving groove in the vertical direction; and a clamping groove is formed in the moving groove extending along a horizontal direction, and when the liquid level detection apparatus inclines, the upper clamping portion offsets into the clamping groove, such that the floater not easily be sucked to block a suction port, thereby avoiding resulting in the phenomenon that an alarm is given when the water is not full in fact.

There is provided a method (200) and a system (100) for monitoring a leakage of an insulating fluid from a termination device (10) of a high voltage cable connection (14). The system (100) comprises a sensor for measuring a parameter of the termination device and a controller configured to perform the method, which comprises receiving (115; 202) at least one measurement of a parameter of the termination device (10) from a sensor (110); and determining (125; 204) a level (312) of the insulating fluid within the termination device (10) based on the at least one measurement.

A system for monitoring a floating roof of a storage tank is disclosed. The system comprising a plurality of tags coupled to a floating roof of a storage tank at a plurality of locations. The storage tank is configured to contain a liquid. At least one image capturing device is installed in proximity to the storage tank and configured to capture one or more images of the plurality of tags. At least one processor is communicatively coupled to the at least one image capturing device and configured to determine a distance of the plurality of tags from the at least one image capturing device; determine an orientation of the floating roof from the determined distance of the plurality of tags; compare the determined orientation with a predefined threshold; and generate one or more alarms when the determined orientation of the floating roof exceeds the predefined threshold.

Systems and methods for detecting a liquid height level within a container include a stationary platform for positioning at a fixed position, a floating platform for floating proximate a surface level of a liquid, and a processor for calculating a height level of the liquid. The floating platform includes at least one pair of light-projecting devices for projecting toward the stationary platform and the stationary platform includes a light-receiving surface for reception of the projected light thereon, a light-sensing element for detection of light incident upon the light-receiving surface, and circuitry for generating light-detection signals based on the detection of light incident upon the light-receiving surface. The processor is configured to determine, based on the light-detection signals, the height level of the liquid.