A method for mitigating water invasion to a submersible motor includes: forming an accumulation zone within an inner space of the submersible motor, wherein the accumulation zone is disposed at a bottom of the inner space below a motor shaft; measuring a conductivity of a fluid inside the accumulation zone using a sensor, wherein the fluid comprises water and dielectric oil; comparing the conductivity of the fluid with a threshold value; upon detecting that the conductivity of the fluid is greater than the threshold value, activating a solenoid pump to discharge the fluid from the accumulation zone to an outside of the submersible motor.

Systems and methods for storing fluid are described. In some embodiments, a system may include a container having an internal volume that is configured to change as fluid enters or exits, a first shell component, and a second shell component. The first shell component may limit an expansion of the container in a first direction, and the second shell component may limit the expansion of the container in a second direction that is opposite the first direction.

A fuel cell system includes a fuel cell stack, a gas liquid separator, a water level sensor, a drain valve, and a control unit. When a failure detection processing method is performed, a control unit makes a determination of main conditions where the water level sensor determines that water is present, a power generation current value of the fuel cell stack is not more than a predetermined current threshold value, a drain valve for discharging water in the gas liquid separator is open. Then, the control unit counts elapsed time when the main conditions are satisfied, and in the case where the main conditions are kept satisfied for the elapsed time which is larger than a time threshold value, the control unit determines that the water level sensor has a failure.

The present invention relates to a method for monitoring state of a coil having at least two connection wires, which coil is part of an apparatus for determining at least one process variable of a medium in a containment, as well as relating to an apparatus for executing the method. The method, in such case, includes method steps as follows: ascertaining a desired-value of an ohmic total resistance for the coil and the connection wires, supplying the coil with an electrical excitation signal and receiving an electrical, received signal from the coil by means of the two connection wires, ascertaining an actual-value of the ohmic total resistance based at least on the received signal, and comparing the actual-value with the desired-value and ascertaining a state indicator based on the comparison.

Methods and systems for employing a sensor to detect two physical characteristics of a liquid in a beverage machine. A sensor may have a conductive probe portion to contact liquid, e.g., to detect a liquid level in a removable water tank, and a thermistor portion to detect a temperature of the liquid.

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.

There is described an automated liquid management system for a liquid container such as a bathtub. The system comprises a faucet or a shower head, a drain closure, a level sensor and a controller operatively coupled to thereto. The controller operates the faucet or a shower head, the drain closure and the level sensor to monitor and control the level of liquid in the container.

In one example a fluid level sensing device is described. The device includes a sensing die having a number of fluid level sensors disposed thereon and a number of control devices, each control device corresponding to one of the number of fluid level sensors. A control device includes a comparing device to determine a state of a corresponding fluid level sensor. A state of the fluid level sensor is selected from the group consisting of a fluid state and a no-fluid state. Each control device also includes a non-volatile memory device corresponding to the comparing device to indicate whether the corresponding fluid level sensor is at the fluid state or the no-fluid state. A control device also includes a locking device to irreversibly set the non-volatile memory device to the no-fluid state independent of a write command from a controller.

The liquid source vaporization apparatus comprises a tank inside of which a liquid source is stored, a heater that applies heat to the liquid source in the tank, a plurality of liquid surface detecting bodies wherein each of liquid surface detecting points is arranged in a predetermined height range in the tank with a set height regarded as the reference, a reference detecting body arranged above the predetermined height range in the tank, and a liquid surface discriminator that discriminates whether or not there is the liquid source at the set height on a basis of a threshold value set based on a change in electrical resistance of the reference detecting body and a change in electrical resistance of a plurality of the liquid surface detecting bodies.

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.