A reduction device includes a housing defining an input chamber configured to receive exhaust from a power source, an output chamber, an exhaust channel configured to direct the exhaust from the input chamber to the output chamber, and a longitudinal axis. The reduction device also includes a treatment unit disposed in the exhaust channel and along the longitudinal axis. The treatment unit is configured to at least partly remove pollutant species from the exhaust. The reduction device also includes an attenuation component disposed in the housing and radially outward of the treatment unit. The attenuation component is fluidly connected to the exhaust channel, and is configured to attenuate a range of frequencies corresponding to operation of the power source. Additionally, the exhaust channel prohibits exhaust entering the input chamber from exiting the housing without passing through the treatment unit.

A liquid level detector includes: a vertically-mounted accumulator configured to store refrigerant; a heater configured to heat the accumulator; a temperature detector configured to detect a surface temperature of the accumulator; a pressure detector configured to detect a pressure of the refrigerant in the accumulator; and a controller configured to detect a position of a liquid surface of the refrigerant in the accumulator based on a surface temperature of the accumulator detected by the temperature detector when the accumulator is heated by the heater, and a pressure of the refrigerant in the accumulator detected by the pressure detector.

Systems and methods are disclosed for tank level monitoring. To perform monitoring of fuel levels of fuel tanks, tank level monitor devices may be affixed to the fuel tanks. The tank level monitors may be used to provide data relating to the fuel tanks to a remote location (such as a mobile device application). A predictive algorithm may also be implemented to more effectively schedule refueling events for various fuel tanks.

A liquid supply system includes a suction lance (6) configured to be inserted into a liquid container (14) and at least one level sensor (10, 12) fixed on the lance (6) and configured to detect a liquid level (22) inside a liquid container (14). A control device (4) is connected to the level sensor (10, 12) and configured to determine a rate of change of the liquid level (22) detected by the at least one level sensor (10, 12) and to detect a lance removal if the rate of change reaches or exceeds a predefined threshold. A method for detecting the removal of a suction lance (6) from a liquid container (14) is provided.

An indicator is provided in a vehicle for indicating necessity of change of a fuel vapor absorber in a venting line of a vehicle tank, especially a methanol tank for fuel cell vehicles.

Methods and systems for providing a resource dispenser status for a resource dispenser associated with a facility. One system includes an electronic processor. The electronic processor is configured to receive a set of signals. The electronic processor is also configured to compare a first signal included in the set of signals to a set of thresholds. The electronic processor is also configured to determine a resource dispenser status based on the comparison of the first signal to the set of thresholds. The electronic processor is also configured to generate and transmit the resource dispenser status to a remote device, wherein the remote device provides the resource dispenser status to a user.

A ship weighing system and a weighing method thereof include a collection module, a computing server, a wireless router, a display control terminal, and a network switch, which are installed in the ship. The collection module synchronously collects water level data of a stern and trim angle data of a front portion, a middle portion, and a rear portion of the ship. The computing server respectively calculates, based on the water level data collected by the collection module, an accumulated volume of the ship below a slice section parallel to a bottom plane of the ship corresponding to the water level data and a volume of a trim wedge formed by the slice section and an actual horizontal plane. The computing server combines results and corrects a volume of a vertical arch wedge in the middle portion of the ship to obtain a displacement volume of the ship.

A leak and/or overflow detection system for an aircraft may comprise a first sensor configured to be disposed in a toilet bowl, a second sensor configured to be disposed in a waste tank, a first acoustic emission sensor and a second acoustic emission sensor configured to be disposed upstream and downstream of a valve, or any combination of the first sensor, the second sensor, and the acoustic emission sensors. A controller may receive various data from the sensors and determine whether a leak and/or an overflow condition is occurring or about to occur.

In one implementation, the specification discloses a liquid level sensor and communication device, system and/or method. In some implementations, the communication light weight portable, interactive device for personal or interpersonal non-video communication using voice messaging comprising a substantially thin polylateral shaped housing unit comprising: a) a front cover, a back cover and side walls connecting the front cover with the back cover; b) a digital sound recording unit configured with a manual switch for activating and recording a message; c) a digital sound storage unit; d) a playback unit configured with a manual switch for activating and playing back the recorded message; e) a microphone; and f) a speaker; and optionally, i) a light emitting device (LED) indicator or an audio indicator or a combination thereof, for indicating or alerting the presence of a recorded message; and/or ii) a manual ON/OFF switch for turning on and turning off the device when the device is not in use; wherein the sound recording unit, sound storage unit, playback unit, microphone and speaker are configured to allow a user to record a message and playback the message using the manual switches; and methods for using the device and/or iii) on/off switch also have a learning mechanism, by placing the unit on the empty part of the container and pressing on/off a number of times. Then the unit will learn the specifics of the bottle and will react to the filled portion of the bottle.

An example of an apparatus is provided. The apparatus includes a current source. The apparatus includes a conductor in electrical communication with the current source and a conductive fluid in a reservoir. The apparatus includes a first sensing rod to extend into the reservoir, wherein the first sensing rod has a first diameter. The apparatus includes a tip disposed at an end of the first sensing rod to interact with a surface of the conductive fluid. The tip has a second diameter over a first portion of the tip adjacent to the first sensing rod. The second diameter is smaller than the first diameter. The apparatus includes a sensor to detect an electrical signal between the conductor and the first sensing rod.