A measuring apparatus for detecting a fill level or limit level of a filling material in a container, wherein the measuring apparatus is designed to be situated on the container and comprises a sensor for determining the fill or limit level, a power supply unit which is electrically connected to the sensor and is designed and configured to supply the sensor with electrical power, an activation unit which is connected at least to the power supply unit for signal communication and an associated method of use.

A measuring apparatus for detecting a fill level or limit level of a filling material in a container, wherein the measuring apparatus is designed to be situated on the container and comprises a sensor for determining the fill or limit level, a power supply unit which is electrically connected to the sensor and is designed and configured to supply the sensor with electrical power, an activation unit which is connected at least to the power supply unit for signal communication and an associated method of use.

A sensing system for detecting degradation of a machine fluid is disclosed. The sensing system may comprise a tag having electrical contacts. The tag may be configured to transmit a wireless signal when the electrical contacts are in electrical communication. The sensing system may further comprise a dissolvable element separating the electrical contacts and obstructing electrical communication between the electrical contacts. The dissolvable element may be configured to dissolve and allow electrical communication between the electrical contacts when an acid content of the machine fluid reaches a level indicative of the degradation of the machine fluid.

An apparatus, system and method for providing a consumable level monitor for association with a solid content-filled consumable. The embodiments may include a sensing module embedded in a label associated with the consumable suitable to sense the consumable level; and a visual indicator suitable to receive the consumable level from the sensing module, and for communicating the consumable level to a user.

According to one embodiment, a sensor includes a base, first and second detection units. The base includes first and second base regions. The first detection unit includes a first detection element including a first resistance member, a first conductive member, and a first insulating member. A part of the first insulating member is between the first resistance member and the first conductive member. A first gap is provided between the first base region and first detection element. The first detection element has a first area. The second detection unit includes a second detection element including a second resistance member, a second conductive member, and a second insulating member. A part of the second insulating member is between the second resistance member and the second conductive member. A second gap is provided between the second base region and second detection element. The second detection element has a second area.

A storage tank for liquid hydrogen having an outer tank , an inner tank which is arranged inside the outer tank , and a device for indicating a predefined fill level has been reached with a cell which can be arranged inside the inner tank and is filled with a gas which liquefies when the cell is dipped into the liquid hydrogen , further having a pressure indicator device which indicates a pressure drop in the cell in the case of liquefaction of the gas and therefore indicates the predefined filling level has been reached, and further having a heating element which continuously introduces heat into the gas .

A printing device includes a main control board, a resin vat, a vibration generating assembly, a detection assembly and a support plate. The vibration generating assembly includes a drive component and a paddle. A drive end of the drive component is connected to the paddle, and the drive end is configured to drive the paddle to vibrate. The detection assembly includes an elastic sheet, a resistance strain gage and a detection circuit. The resistance strain gage is attached to the elastic sheet, a first end of the elastic sheet is arranged on the first face of the support plate, and a second end of the elastic sheet extends into the liquid to be detected. The detection circuit is configured to determine an output voltage according to a resistance value of the resistance strain gage. Automatic detection of the liquid level depth of the liquid to be detected is achieving.

A heater system includes an integrated heater device and a control system. The integrated heater device includes a thermocouple for measuring temperature and one or more multiportion resistive elements that are operable as heaters to create a temperature differential between the fluid and air to detect the fluid, and as sensors to measure a fluid level. The control device operates the integrated heater device as a sensor or heater based on one or more performance characteristics of the heater system and self-calibrates the heater device.

A heater system includes an integrated heater device and a control system. The integrated heater device includes a thermocouple for measuring temperature and one or more multiportion resistive elements that are operable as heaters to create a temperature differential between the fluid and air to detect the fluid, and as sensors to measure a fluid level. The control device operates the integrated heater device as a sensor or heater based on one or more performance characteristics of the heater system and self-calibrates the heater device.

The present invention is directed to methods of improving accuracy of droplet metering using at least one on-actuator reservoir as the fluid input. In some embodiments, the on-actuator reservoir that is used for metering droplets includes a loading port, a liquid storage zone, a droplet metering zone, and a droplet dispensing zone. The on-actuator reservoirs are designed to prevent liquid flow-back into the loading port and to prevent liquid from flooding into the droplet operations gap in the dispensing zone.