Pressure sensor systems for measuring a liquid pressure and deriving a liquid level from the measured pressure using gas pressure sensing devices. In one embodiment, liquid pressure results in compression or decompression of a trapped gas (as an example, air), wherein the gas pressure is detected by a gas pressure sensing device directly or a gas pressure sensing device that is protected inside a flexible pouch filled with a liquid. In another embodiment, a gas pressure sensing device is packaged in a flexible pouch filled with an inert liquid to protect the sensing device and circuit thereof from external contaminants while accurately transferring pressure from the liquid through a protective barrier. Application of such sensors in a wireless flood or a wireless liquid level measurement system is described as well.

The object of the invention is an apparatus and a method for measuring dewatering in the wet end of a paper machine. What is essential in the invention is that the measuring system (26) comprises an essentially horizontal inlet pipe (10) on the machine level (11), which pipe is installed in the measuring receptacle (27), and in that the separation of air (22) is performed in an expanded pipe section (15) made in the inlet pipe (10) and in the outlet pipe (16) connected to it. A weir plate is installed in the measuring receptacle (27) of the measuring system (26), the weir plate functioning as a measuring weir (8) for measuring the amount of the dewatering flow, and from a pressure difference transmitter (20) installed on one side, which transmitter measures the height of the water surface produced by the measuring weir (8) for measuring the amount of water (7).

A mica water level gauge glass includes a steam tee fitting, a balance pipe, a water tee fitting, a steam connecting pipe, a water connecting pipe, a condensation tank, a longitudinal vertical gauge body, and a mica assembly. The gauge body includes a thermal compensation cavity, a steam-water cavity, an auxiliary heat confluence device, and a horizontal steam cavity. The exit points of the thermal compensation cavity arranged in the gauge body is lower than the point of the steam-water cavity exiting from the gauge body.

A monitoring system for monitoring a water level in a plumbing element. The monitoring system has a sensor unit, which includes at least one sensor for detecting a measured value and with the aid of which a water level in a receiving space of the plumbing element may be ascertained. A plumbing element is also provided that comprises a receiving space for accommodating water and at least one water outlet for emptying the water from the receiving space.

A fluid flow monitoring and management device that includes a fluid flow body having a magnet and a sensor secured to the fluid flow body. The sensor includes a magnetometer in a signal relationship with the magnet.

A device (1) for monitoring the operation of a dosage dispenser (2) which includes a suction pipe (5) suitable for being plunged into the liquid additive (3) contained in a container (6), the monitoring device including elements for detecting the suction of liquid additive and elements for displaying operating parameters of the dosage dispenser; the detection elements include a tube (10), separate from the suction pipe (5), one end (10b) of which is configured to be plunged into the container of liquid additive, and the other end (10c) is kept stationary relative to the suction pipe in order to be located outside the container, the other end (10c) being closed and provided with a sensor of the air pressure inside the tube, the sensor outputting an electrical signal, and elements for using the signal from the sensor, connected to the outlet of the sensor, to provide information on the operation.

The invention relates to a sensor (1) for determining a liquid level (NE) for an aircraft tank (100), the determining sensor (1) comprising a closure device (2) for closing a port (101) of the tank (100) and a measuring device (3), removably mounted on the closure device (2), comprising a liquid line (20) configured to convey liquid from the port (100) of the tank (100), and a member (21) for automatically sealing the liquid line (20) if the measuring device (3) is not mounted on the closure device (2), the measuring device (3) comprising at least one pressure measuring member (30) configured to measure a pressure difference between the liquid pressure (P1) in the liquid line (20) and a reference pressure (P2) in order to deduce the liquid level (NE) thereof.

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 liquid intake tracking device for removable insertion into a beverage container in order to track an amount of liquid consumed, the rate of liquid consumption over time, and to provide alerts to the user. The device connects wirelessly to an application executing on an external electronic device which provides user with liquid consumption data and reports concerning the user's interaction with the beverage container. Methods for tracking liquid intake are also disclosed.

A liquid intake tracking device for removable insertion into a beverage container in order to track an amount of liquid consumed, the rate of liquid consumption over time, and to provide alerts to the user. The device connects wirelessly to an application executing on an external electronic device which provides user with liquid consumption data and reports concerning the user's interaction with the beverage container. Methods for tracking liquid intake are also disclosed.