A pneumatic depth sensor system for remotely reporting on a depth of a body of fluid is provided. The system comprises a regulated source of compressed gas, a first pressure sensor upstream from a normally-closed electronic solenoid valve, a second pressure sensor downstream from the electronic solenoid valve and a bubbler outlet downstream from the second pressure sensor, the bubbler outlet for locating at a bottom of the body of fluid, the depth sensor system under control of a microprocessor, the microprocessor in electronic communication with the first and second pressure sensors and the normally-closed electronic solenoid valve, and configured to instruct the normally-closed electronic solenoid valve to be in a fully open position or a fully closed position and to rapidly change position in response to a pressure reading from the second pressure sensor.

The present disclosure is related to a level and/or density sensor for vessels suitable for storing liquids, in particular barrels or vats, more in particular barrels or vats for storing or producing wine. The hydrostatic pressure differential sensor for measuring volume and/or density disclosed herein comprises a main body; a tube for diving into the liquid; a hydrostatic pressure differential sensor; an air injector for injecting air into said tube; wherein the tube is coupled to the main body; wherein the hydrostatic pressure differential sensor has two inlets, a first inlet airtight connected to the upper top of said tube, configured so that the tube maintains air present in the interior thereof when dived into the liquid, and a second inlet for communicating with the interior of the vessel.

A paper shredder bin-full sensor with a push bar, a conductive element coupled to the push bar, a sensing contact assembly normally set apart from the conductive element, and a signaling contact coupled to the sensing contact assembly. Sensor includes a push bar sweeper between the conductive element and the push bar, and a biasing element coupled to the push bar sweeper, the biasing element elastically resists the shredded material force. A predetermined shredded material force presses the push bar, causing the conductive element to couple to the sensing contact assembly, in turn causing a waste bin-full signal to emanate. Push bar can be articulated and non-articulated. Articulated push bars include upper and lower push bars, and respective tensioning element connecting the respective upper and lower push bars. Lower push bar is extended from upper push bar. Paper shredder can have articulated or non-articulated push bars.

A paper shredder bin-full sensor with a push bar, a conductive element coupled to the push bar, a sensing contact assembly normally set apart from the conductive element, and a signaling contact coupled to the sensing contact assembly. Sensor includes a push bar sweeper between the conductive element and the push bar, and a biasing element coupled to the push bar sweeper, the biasing element elastically resists the shredded material force. A predetermined shredded material force presses the push bar, causing the conductive element to couple to the sensing contact assembly, in turn causing a waste bin-full signal to emanate. Push bar can be articulated and non-articulated. Articulated push bars include upper and lower push bars, and respective tensioning element connecting the respective upper and lower push bars. Lower push bar is extended from upper push bar. Paper shredder can have articulated or non-articulated push bars.

A vessel with a cavity for measuring level is disclosed. The vessel includes a differential pressure sensor having a first port and a second port, a reference tube that connects the first port of the differential pressure sensor to a bottom portion of the cavity, and an impulse tube that connects the second port of the differential pressure sensor to an impulse tube ending. At least a portion of the impulse tube extends through the cavity and ends at a fluid inlet. The fluid inlet is located at a level above the reference tube.

An example system includes a fuel tank, fittings mounted through a wall of the fuel tank, and optical sensors positioned within the fittings. A respective optical sensor includes a first pressure sensing end inserted through a fitting and internally into the fuel tank and a second end extending externally from the fuel tank. The system also includes an optical fiber bundle mounted external to the fuel tank, and having an optical fiber connected to each of the plurality of optical sensors for guiding light to each of the plurality of optical sensors.

The invention relates to various means for implementing a method for compensating measured values in capacitive pressure measuring cells using a measuring capacity and at least one reference capacity, comprising the following steps: determination of a pressure-induced capacitance change of the reference capacitance as a function of a pressure-induced capacitance change of the measuring capacitance, determination of a thermal shock-induced capacitance change of the reference capacitance as a function of a thermal shock-induced capacitance change of the measuring capacitance, measurement of the measuring capacitance and of the at least one reference capacitance, determination of the thermal shock-induced capacitance change of the measuring capacitance from a combination of the above dependencies, compensation of the measured measuring capacitance by the thermal shock induced capacitance change of the measuring capacitance, and determination and output of the pressure-induced capacitance change or a quantity derived therefrom.

The present disclosure is related to a level and/or density sensor for vessels suitable for storing liquids, in particular barrels or vats, more in particular barrels or vats for storing or producing wine. The hydrostatic pressure differential sensor for measuring volume and/or density disclosed herein comprises a main body; a tube for diving into the liquid; a hydrostatic pressure differential sensor; an air injector for injecting air into said tube; wherein the tube is coupled to the main body; wherein the hydrostatic pressure differential sensor has two inlets, a first inlet airtight connected to the upper top of said tube, configured so that the tube maintains air present in the interior thereof when dived into the liquid, and a second inlet for communicating with the interior of the vessel.

Disclosed herein are a device and method designed for determining the liquid level in a container through measuring the pressure in the liquid by a pressure sensor located at the bottom of the container within a chamber designed to prevent solid particles dispersed in the liquid from reaching the sensor. Measuring the pressure of the liquid in the container can be based on an upper chamber located above a lower chamber, both adjacent chambers are located within a container. The upper chamber comprises tiny slots allowing the liquid in the container to enter the upper chamber and exert a weight on a diaphragm gasket functioning as a common-wall of the two adjacent chambers. The diaphragm gasket exerts pressure resulting from the liquid weight, on the lower chamber containing the pressure sensor designed to measure the pressure exerted on the lower chamber. In some embodiments, the device and method disclosed herein are used for measuring changes in the pressure at the bottom of the container, wherein the pressure changes are indicative of changes in the liquid level. In some embodiments, the measured pressure can be one or more pressure values measured in a continuously fashion by a one or more pressure sensors.

The present invention is about a volume-measuring device installed inside a box that used to store a liquid. The measuring device is placed at the bottom of the box dispensing the liquid, and displays via a measuring tower a measure of the volume of the liquid still in the box. The device is comprised of a receptacle or sealed pouch connected to a measuring tower. As the pressure from the weight of the liquid changes, the receptacle reacts by moving the measuring marker to reflect such change, thus measuring the current liquid volume in the dispensing box.