A floatable flood detector has a watertight housing that carries internally a wireless transmitter and a fluid sensor. In the presence of sensed fluid, an alarm message can be transmitted by the transmitter to a displaced monitoring unit. The sensor has a portion exposed to the fluid of interest outside of the housing. The antenna is carried, at least at a fluid level, relative to the floating housing.

A water level monitoring system includes at least one floating unit, a load cell and a sensor module. The floating unit is used for sinking in water. The load cell is connected to the floating unit for generating a force value reflecting buoyancy generating from the floating unit entering the water. The sensor module is connected to the load cell for sensing the force value from the load cell and includes an amplifier for amplifying a sensed value. A processor connected to the amplifier receives the sensed value from the amplifier and calculating a water level depth to be measured. Thus the water level motoring system has features of low cost, high stability and flexibility.

A float product and method of use. A float is described comprising an elongated body having first and second end sections extending between and connecting a weighted section at the first end and a bulb section at the second end. The float is particularly adapted for use in a jug, such as a growler, during filling to help prevent overflow and spillage. Methods of using the float product are also described. The float can be mounted to the jug by way of a ring clip which slides over the neck of the jug.

The disclosure generally describes computer-implemented methods, software, and systems for gauging tanks. A computer-implemented method includes generating, using an interrogator, a radio frequency signal directed towards a radio frequency identification (RFID) device that is freely floating on the liquid stored within the tank, receiving a return signal from the RFID device, the return signal being associated to a location of the RFID device, processing the return signal to determine a height of the liquid stored within the tank based on a triangulation algorithm, and determining a result data based on the height of the liquid stored within the tank and one or more tank characteristics.

Methods of determining fluid density within a tank, such as an aircraft tank are include installing one or more clusters of sensors each cluster comprising a plurality of sensors including at least one pressure sensor. A minimum of two pressure measurements are required for density estimation. The fluid density between different clusters may be determined from pressure measurements obtained by each cluster and the distance between the clusters. Furthermore, the distribution of density throughout the tank may be determined by employing clusters including two or more pressure sensors.

A system for monitoring coastal underground water is disclosed. The system includes a freshwater/saltwater interface position tracking device that is inserted into an observation well used for observing coastal underground water and can move on a freshwater/saltwater interface according to a change of buoyancy; and a first measuring sensor that is inserted into the observation well so as to be placed at a position above the freshwater/saltwater interface position tracking device and has a distance measuring unit used for measuring a first distance between the freshwater/saltwater interface position tracking device and the first measuring sensor, wherein the first measuring sensor has a first signal output unit used for outputting a signal indicative of the measured first distance.

The present invention provides a system for approximating the contents of a dispensing container, the system comprising: a dispensing container comprising a vessel, the vessel having: a formation and/or a discreet element in or on the vessel which causes the centre of gravity of liquid contents of the vessel to be positioned differently, when oriented in a lain-on side attitude, from its notional position, in the absence of the formation and/or discreet element, and an indicator configured to indicate a change of the liquid contents of the vessel; a gauge, separate to the dispensing container, configured to be co-operable with the indicator of the dispensing container, the gauge comprising an interface between the gauge and the dispensing container and a scale which, in co-operation with the indicator of the dispensing container, signifies to a user the approximate liquid contents of the vessel.

A level sender for a tank includes a sensor device. The sensor device includes a primary pressure sensor, a reference pressure sensor, and a correction pressure sensor. A primary tube at least partially encloses the primary pressure sensor and extends from an upper region of the tank to a lower region of the tank. A reference tube at least partially encloses the reference pressure sensor and extends from the upper region to the lower region. A correction tube at least partially encloses the correction pressure sensor. The correction tube at least partially enclose the correction pressure sensor in the upper region. The sensor device further includes a processor coupled to the primary, reference, and correction pressure sensors to determine a level of liquid within the tank based on pressure measurements within the primary, reference, and correction tubes.

An energy transfer apparatus can include an electromechanical gauge having a motor and a displacer connected to the electromechanical gauge by a wire, wherein energy is transferred from the motor of the electromechanical gauge to the displacer using the motor and the wire combined with mechanical drag. A spring may be located between the wire and a mass inside the displacer, wherein a lifting and a lowering of the displacer generates an oscillation of the displacer body, wherein the oscillation is usable to generate the energy. The displacer may include a moving element that can introduce the mechanical drag when the displacer is moved through liquid by the motor. The movement of the moving element can be transferred into mechanical movement or into electricity.

A floatable flood detector has a watertight housing that carries internally a wireless transmitter and a fluid sensor. In the presence of sensed fluid, an alarm message can be transmitted by the transmitter to a displaced monitoring unit. The sensor has a portion exposed to the fluid of interest outside of the housing. The antenna is carried, at least at a fluid level, relative to the floating housing.