Abstract: A wound-care system includes a first pump fluidly coupled to an oxygen source. An oxygen concentrator is fluidly coupled to the first pump. A humidification system is fluidly coupled to the oxygen concentrator. A wound dressing is fluidly coupled to the humidification system and to an exudate chamber. A negative-pressure tube fluidly is coupled to the exudate chamber. A first valve is disposed between the first pump and the oxygen concentrator. A second valve is disposed between the oxygen concentrator and the wound dressing. A third valve is disposed in the negative-pressure tube. Selective activation of the first pump, the first valve, the second valve, and the third valve facilitates delivery of at least one of individual, sequential, or simultaneous negative-pressure treatment and oxygen-rich fluid treatment to the wound via the wound dressing.

Abstract: A wound-care system includes a first pump fluidly coupled to an oxygen source. An oxygen concentrator is fluidly coupled to the first pump. A humidification system is fluidly coupled to the oxygen concentrator. A wound dressing is fluidly coupled to the humidification system and to an exudate chamber. A negative-pressure tube fluidly is coupled to the exudate chamber. A first valve is disposed between the first pump and the oxygen concentrator. A second valve is disposed between the oxygen concentrator and the wound dressing. A third valve is disposed in the negative-pressure tube. Selective activation of the first pump, the first valve, the second valve, and the third valve facilitates delivery of at least one of individual, sequential, or simultaneous negative-pressure treatment and oxygen-rich fluid treatment to the wound via the wound dressing.

Abstract: In many applications, where the level of a liquid needs to be monitored (and possibly controlled), it is not necessary to provide a continuous (analog) liquid level signal, but limit sensing to one (or two) discrete levels over a small level range. In this case, a ceramic substrate sensor with discrete thermistor/heater pairs provides necessary information to control the level of the fluid. Protection of the substrate from liquid (and potential contaminants) is accomplished by coating the surface with an inert glass (“glaze”) layer and/or polymer layer (e.g., “Parylene”). Packaging of the coated substrate is accomplished by protective base, epoxy, and slosh shield. Cost can be significantly reduced over a prior art multiple thermocouple based sensor design, since discrete electronic components are avoided or reduced. Also, the number of pins, and therefore electrical connections, can be significantly reduced.

Abstract: In many applications, where the level of a liquid needs to be monitored (and possibly controlled), it is not necessary to provide a continuous (analog) liquid level signal, but limit sensing to one (or two) discrete levels over a small level range. In this case, a ceramic substrate sensor with discrete thermistor/heater pairs provides necessary information to control the level of the fluid. Protection of the substrate from liquid (and potential contaminants) is accomplished by coating the surface with an inert glass (“glaze”) layer and/or polymer layer (e.g., “Parylene”). Packaging of the coated substrate is accomplished by protective base, epoxy, and slosh shield. Cost can be significantly reduced over a prior art multiple thermocouple based sensor design, since discrete electronic components are avoided or reduced. Also, the number of pins, and therefore electrical connections, can be significantly reduced.

Abstract: A temperature control circuit provides for optical isolation, dry start protection, dedicated load control, manual reset, and relay control in hot water heaters and related applications. The control circuit removes power from a load at a first temperature, and includes a first optical isolation device, a first diode temperature sensor, and a first switching mechanism. The first optical isolation device controls operation of a power source, where the power source is provided to the load, such as a hot water heater heating element. The first diode temperature sensor is biased to provide a switching signal at the first temperature. The first switching mechanism is disposed between the first diode temperature sensor and the first optical isolation device, where the first switching mechanism disengages operation of the first optical isolation device in response to the switching signal.