The present invention relates to an apparatus and a method for detecting a water level, which are capable of generating a water level detection signal which is alternating current output to a water level detection sensor by using two direct current control signals alternately output from a micom.

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.

A management system includes: a detection device including a main body that has a shape installable to a discharge port, electrodes that are provided in the main body and are detectors detecting a liquid, and a communication device that functions as a transmitter transmitting information regarding a detection result obtained by the detector; and an estimation device including a receiver that receives the information transmitted from the transmitter, and an estimator that estimates a discharge state of the liquid from the discharge port based on the information received by the receiver.

A management system includes: a detection device including a main body that has a shape installable to a discharge port, electrodes that are provided in the main body and are detectors detecting a liquid, and a communication device that functions as a transmitter transmitting information regarding a detection result obtained by the detector; and an estimation device including a receiver that receives the information transmitted from the transmitter, and an estimator that estimates a discharge state of the liquid from the discharge port based on the information received by the receiver.

A metal ejecting apparatus is disclosed. The metal ejecting apparatus includes a nozzle orifice in connection with the inner cavity and configured to eject one or more droplets of a liquid metal may include the metal printing material, and a first sensor pair in contact with an internal surface of a lower portion of the inner cavity. Each sensor pair is electrically connected to a printing material feed system where the printing material feed system is configured to receive an electrical signal indicative of an electrical connection from each sensor pair when the metal printing material bridges the electrical connection between each sensor in each sensor pair. A method of controlling level in a metal jetting apparatus is also disclosed.

A system for externally monitoring a tank level is provided. The system includes a tank monitoring computer device and at least one sensor array. The at least one sensor array includes a plurality of sensors and a plurality of fasteners. The at least one sensor array is configured to be attached to a tank by the plurality of fasteners. The tank monitoring computer device is in communication with the at least one sensor array. The tank monitoring computer device is programmed to a) receive a plurality of sensor readings from the plurality of sensors associated with the at least one sensor array, b) calculate a first tank level using a first method, c) calculate a second tank level using a second method, d) compare the first tank level to the second tank level to determine a final tank level, and e) report the final tank level.

A level measurement system for conductive liquids including a liquid container (10) and at least three electrodes (18, 20, 22) arranged inside the liquid container (10) at different levels. The electrodes (18, 20, 22) are connected to a network including a plurality of resistor elements (R, R1, R2, R3, RP1, RP2, RR1, RR2). The network includes at least two input terminals (V+, GND) for applying an external voltage and at least two output terminals providing a voltage depending on the level of the conductive liquid in the liquid container (10). The level measurement system is provided for detecting at least three different levels of conductive liquids in the liquid container (10) and indicating the levels by one voltage value. The level measurement system may be used for water in a storage container such as in a domestic appliance having a liquid container for supplying the domestic appliance with liquid.

A level measurement system for conductive liquids including a liquid container (10) and at least three electrodes (18, 20, 22) arranged inside the liquid container (10) at different levels. The electrodes (18, 20, 22) are connected to a network including a plurality of resistor elements (R, R1, R2, R3, RP1, RP2, RR1, RR2). The network includes at least two input terminals (V+, GND) for applying an external voltage and at least two output terminals providing a voltage depending on the level of the conductive liquid in the liquid container (10). The level measurement system is provided for detecting at least three different levels of conductive liquids in the liquid container (10) and indicating the levels by one voltage value. The level measurement system may be used for water in a storage container such as in a domestic appliance having a liquid container for supplying the domestic appliance with liquid.

Disclosed herein a liquid level detection device capable of appropriately detecting a liquid level of a high temperature plasma raw material in a reservoir for storing the high temperature plasma raw material. The liquid level detection device includes: an upper limit level sensor configured to detect that the liquid level of the tin is elevated from downward to reach an upper limit level; and a refilling level sensor configured to detect that the liquid level of the tin is lowered from upward to reach a refilling level or a lower limit level. A detection responsiveness of the liquid level of the upper limit level sensor is higher than the refilling level sensor or the lower limit level sensor, and a detectability of the liquid level of the refilling level sensor or the lower limit level sensor is higher than the upper limit level sensor.

Disclosed herein a liquid level detection device capable of appropriately detecting a liquid level of a high temperature plasma raw material in a reservoir for storing the high temperature plasma raw material. The liquid level detection device includes: an upper limit level sensor configured to detect that the liquid level of the tin is elevated from downward to reach an upper limit level; and a refilling level sensor configured to detect that the liquid level of the tin is lowered from upward to reach a refilling level or a lower limit level. A detection responsiveness of the liquid level of the upper limit level sensor is higher than the refilling level sensor or the lower limit level sensor, and a detectability of the liquid level of the refilling level sensor or the lower limit level sensor is higher than the upper limit level sensor.