In one aspect the present disclosure relates to a sensor for measuring at least one physical or chemical parameter of a cartridge filled with a liquid substance. In a further aspect the disclosure relates to a drug delivery device equipped with such a sensor, wherein the sensor includes a planar flexible foil having a first section and having a second section separated from the first section, at least one measurement electrode located on the flexible foil, wherein the flexible foil is wrappable into a wrapped configuration in which the foil forms at least a first wrap with an inner diameter that is equal to or larger than an outer diameter of the cartridge, wherein in the wrapped configuration the first section and the second section at least partially overlap, at least one fastener located in one of the first and second section and configured to attach to the other one of the first and second sections for keeping the flexible foil in the wrapped configuration.

A cartridge for an aerosol-generating system includes a sensor including a capacitor with a first capacitor plate and a second capacitor plate, a storage portion for storing an aerosol-forming substrate, and a vaporizer. The storage portion is between the first capacitor plate and the second capacitor plate. The permittivity of the liquid storage portion changes upon a change of the volume f the liquid aerosol-forming substrate held in the liquid storage portion. The sensor is configured to measure the capacitance of the capacitor. The measured capacitance relates to a corresponding permittivity of the aerosol-forming substrate held in the storage portion so that the amount of the volume of the aerosol-forming substrate held in the storage portion is determinable from the measured capacitance.

A device for monitoring a liquid level of a liquid storage tank for a vehicle is capable of improving sensing sensitivity of a liquid level sensor by employing a structure capable of amplifying an electromotive force, which is generated by an electrode, at an electromotive force amplification layer including a carbon micro coil (CMC) and accurately sensing a frozen state of a liquid to perform a heating function so as to resolve the frozen state of the liquid.

The present invention comprises a novel foldable and intrinsically safe plate capacitive sensor to measure liquid depths, solids in liquid depths, and two different liquids depths. This invention is used in onsite wastewater management systems (OWTS) to monitor depths of solids, oil, and effluent in a wastewater tank. The plates are configured to allow for solids, liquids and gases to surround the plates. A number of plates are hung in series from near the OWTS tank lid to at least 18 inches below the output baffle to measure the different materials at different depths in the OWTS tank. The capacitive sensors are capable of use with various materials to measure solids, oil, and effluent depths in an OWTS tank.

Systems and methods for non-contact sensing of the level of process fluid within a hygienic bubble trap are contemplated. In particular, it is contemplated that through the use of one or more capacitance probes having their sensor tips placed adjacent to the vessel wall of a hygienic bubble trap, ideally perpendicularly thereto, the fluid level of the process fluid within the hygienic bubble trap may be measured via the circuit of the capacitance probe detecting variances in the electrical field which extends through the vessel wall, as a result of changes in the dielectric as the process fluid rises and falls. In this fashion, the probe is not wetted and is never placed into physical contact with the process fluid, and thus does not need to undergo any clean-in-place or sterilize-in-place processes, greatly simplifying ease of use.

A recording apparatus includes a storage unit, a first electrode, a second electrode, and a circuit. The storage unit stores a liquid or powder to be supplied to a recording portion configured to perform recording. The first electrode is positioned on an outer surface of the storage unit. The second electrode is positioned away from the storage unit. The circuit is connected to each of the first electrode and the second electrode.

A liquid level sensor having improved performance is disclosed as including a metal cover plate; a conductive pin, the conductive pin penetrating the metal cover plate; a plurality of electrode plates; a plurality of support plates supporting the electrode plates, so that a fixed interval is maintained between the plurality of electrode plates; each electrode plate of the plurality of electrode plates has a wing portion, the wing portion is connected to the conductive pin, and the wing portion extends outward from each electrode plate.

Disclosed herein are various techniques and devices for detecting a level of fluid within a fluid collection receptacle. In one embodiment, a pressure sensor connected to a bottle is provided. The pressure sensor detects air pressure in the bottle as the bottle is filled with a liquid and provides information to determine a volume of the liquid in the bottle.

A method of controlling an electronic aerosol provision system including a capacitor formed by a first electrode, a second electrode and a dielectric between the first electrode and second electrode, a sensor for sensing an electrical characteristic of the capacitor, and a control unit, wherein at least a portion of the dielectric is provided in a cavity between the first electrode and the second electrode, the method including causing power to be supplied to the capacitor; identifying the onset of power to the capacitor to the capacitor as a first time; and measuring an electrical characteristic of the capacitor at a second time.

A body drainage system for draining fluid from a body cavity of a patient, the body cavity being provided with an access port, wherein the system includes: a peristaltic pump mechanism, a housing for housing at least a portion of the peristaltic pump mechanism, a flexible tube configured to be connected at an access port end to the patient access port, and at a collection unit end to a collection unit, a pre-chamber connected to the flexible tube arranged to receive fluid via the flexible tube, a processor,
wherein the pre-chamber is provided with a pressure sensor and the processor is configured to receive pressure signal from the pressure sensor to be able to detect air leakage and/or to calculate the amount of air leakage.