Embodiments described herein generally relate to devices, systems and methods for measuring a volume or number of doses remaining in a drug delivery device that is used for delivering a dose to a patient. In some embodiments, a dose measurement system for measuring the liquid volume in a container includes a light guide disposed and configured to reflect electromagnetic radiation toward the container. The dose measurement system also includes a light guide disposed and configured to emit electromagnetic radiation into the light guide. A plurality of sensors are located in the apparatus that are optically coupleable to the light guide and are disposed and configured to detect the electromagnetic radiation emitted by at least a portion of the light guide. The apparatus also includes a processing unit configured to receive data representing the portion of the detected electromagnetic radiation from each of the plurality of sensors. The processing unit is further operable to convert the received data into a signature representative of the electromagnetic radiation detected by the plurality of sensors.

Methods and systems for determining fluid levels in a tank comprise a mmWave Control unit configured to generate a millimeter wave chirp that ramps linearly from a starting frequency to a higher frequency within a specified time span. The mmWave Control unit transmits the chirp into the tank and receives one or more chirp reflections from the tank. The mmWave Control unit mixes the chirp with the chirp reflections to generate one or more intermediate frequency signals and processes the one or more intermediate frequency signals to derive one or more distances, each distance representing the distance from the top of the tank to one of the one or more fluids in the tank or an obstruction in the tank. A Telemetry Control unit automatically selects intermediate frequency signals having a signal strength above a predefined minimum or distances within a predefined distance window for further processing.

An information processing device includes an acquisition device that acquires, as a first strength, a strength of a radio signal related to position information received at a position of a first height, and a first determination device that determines that the first height is a water level when an attenuation amount of the first strength with respect to a reference strength exceeds a predetermined value.

A wireless drink container can monitor a person's hydration and prompt him or her to drink more if appropriate. The drink containers as described herein can monitor liquid levels and communicate with external devices about the liquid levels and rate of consumption. One or more sensors in the drink container monitor the liquid level within the container. A processor coupled to the sensor(s) estimates how much liquid has been removed from the container from changes in the liquid level and transmits a signal representing the change in liquid level to a smartphone or other external device. It also triggers an audio or visual indicator, such as an LED, that prompts the user to drink more based on the user's estimated liquid consumption and on the user's liquid consumption goals, which may be based on the user's physiology, activity level, and location.

A fill level switch arrangement (1) for determining the fill level of a medium (2) in a container (3) and a method for determining the fill level of a medium (2) in a container (3) using a fill level switch arrangement (1). The fill level switch arrangement (1) has at least one alarm threshold that can be implemented in a simplified manner due to the fill level switch arrangement (1) having a transmitting element (4) and a receiving element (5), wherein the transmitting element (4) is used for transmitting a radio signal and is operatively connected to the receiving element (4), wherein the receiving element (5) is configured to detect radio signals, and wherein the receiving element (5) is configured such that it generates and transmits a switching signal in the event of a change in the received radio signal caused by the medium (2).

A method for radar-based measurement of a filling level of a filling material in a container includes, in successive measurement cycles, generating an evaluation curve, and the relevant current evaluation curve is stored; a first difference curve is formed based on the evaluation curve of the current measurement cycle and a stored evaluation curve of a preceding measurement cycle; and the filling level is determined based on a maximum in the current first difference curve. The filling level is thus established from the difference curve rather than from the evaluation curve, and the filling level can be determined with greater certaintyin particular in the case of filling material having rippled surfaces.

A method for maintaining a boiling rate of a base fluid can include a determination of a fluid level of a turbulated base fluid in a reservoir. The fluid level can be determined by measuring at least one first height of the turbulated base fluid above the fluid level with at least a first sensor. The fluid level can be determined by measuring at least one second height of the turbulated base fluid below the fluid level with the first sensor. The method can include the establishment of the fluid level of the turbulated base fluid. The fluid level can be established according to the measured at least one first and second heights. The method can include the graduated introduction of an input fluid into the reservoir. A control valve can gradually introduce the input fluid in proportion to the established fluid level of the turbulated base fluid.

A plug suitable to be inserted into a refill-opening on a tube, whereby the plug is at least partially made of a refractory material, preferably of firebrick.

Disclosed are devices and methods for determining a fluid level of and the amount of fluid remaining in a container. A portable measuring device can include a housing, a sensor, and a measurement system. The sensor can be supported by the housing and can detect a fluid level of the container. The measurement system can be configured to receive information including a measurement of the container, to determine an amount of fluid in the container based on a measurement of the container and a detected fluid level of the container, and to output the amount of fluid in the container and geometric information of the container. A method can include supplying such a device, placing the device proximal to or in abutment with and moving the device along an outer surface of the container, providing a signal to a user, and outputting the amount of fluid in a container.

A data processor retrieves or accesses a reference bin level versus reference phase for a determined seed type. A measurement device, receiver, or phase measurement module measures an observed phase of a primary received signal. The data processor is adapted to determine an estimated bin level of seeds, where the estimated bin level is established as the reference bin level that corresponds to a respective reference phase that is closest in value to the observed phase.