The invention is an impedance sensor with: a probe which can be influenced in a capacity by a medium surrounding the probe, a measuring oscillation circuit in which the probe is arranged as a capacity-determining element, an electronics unit with a signal generator for excitation of the measuring oscillation circuit and a signal detector for determining a response signal of the measurement oscillation circuit and a signal processing unit connected with the electronics unit, wherein the signal generator is designed as a digital controllable circuit.

An air sampling system is disclosed. The air sampling system includes: an air inflow channel having an air inlet portion at a top end, the air inflow channel being oriented substantially vertically; a fan configured to cause air in a sampling environment to flow into the air inflow channel via the inlet portion; a cooling unit for cooling air in the air inflow channel, the cooling unit disposed downstream of the inlet portion; a collection chamber for collecting liquid water condensed from air in the air inflow channel, the collection chamber being fluidly connected to the air inflow channel; and a sensing unit for determining a volume of liquid in the collection chamber, wherein the cooling unit is controlled in response to signals generated by the sensing unit.

An ostomy bag can include one or more sensors for measuring one or more metrics. An ostomy wafer can also include one or more sensors for measuring one or more metrics. The sensors can be temperature sensors and/or capacitive sensors, for example, and the metrics can include bag fill, leakage, skin irritation, and phase of stoma output, among others.

A sensor includes a planar T-resonator and an oscillator. The planar T-resonator can be a branched T-resonator with at least two symmetrical branches coupled to a stub. The oscillator has an input coupled to the planar T-resonator and an output. The oscillator has a negative resistance within a predetermined frequency range. The oscillator can be configured so that it has an input phase approximately equal to a phase of the planar T-resonator over a majority of the predetermined frequency range.

The present invention comprises a novel foldable and intrinsically safe planar coiled inductance 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 inductors are configured to allow for solids, liquids and gases to surround the coils. A number of coils 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 inductance sensors are capable of use with various materials to measure solids, oil, and effluent depths in an OWTS tank.

A pumping system including a pumping chamber with a fluid sensor having a cylindrical shaft extending into the priming chamber. The sensor has a sensing dome on an end of a cylindrical shaft extending into the priming chamber, with the dome having a vertical base having a diameter less than the cylindrical shaft diameter. The sensor signals a controller whether liquid is present based on an algorithm with settings for dampening of the electromagnetic field, conductance of the electric field, and/or permittivity of the magnetic field using settings which correlate to the fluid environment. The controller controls operation of the pump and primer based on the sensor signal.

An ostomy bag can include one or more sensors for measuring one or more metrics. An ostomy wafer can also include one or more sensors for measuring one or more metrics. The sensors can be temperature sensors and/or capacitive sensors, for example, and the metrics can include bag fill, leakage, skin irritation, and phase of stoma output, among others.

The present invention comprises a novel foldable and intrinsically safe planar coiled inductance 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 inductors are configured to allow for solids, liquids and gases to surround the coils. A number of coils 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 inductance sensors are capable of use with various materials to measure solids, oil, and effluent depths in an OWTS tank.

A sensor assembly that includes a sealed housing. A printed circuit board assembly including a first section that includes processing circuitry is disposed within the sealed housing and a second section that includes detection circuitry extends from the sealed housing. The sensor assembly also includes a conductive target movably coupled to the second section of the printed circuit board to vary net voltage of the detection circuitry as the conductive target moves along the second section to provide an output signal. The processing circuitry detects the output signal and converts the output signal into a linear representation of position of the conductive target in relation to the second section.

An example liquid level sensor is described. The liquid level sensor includes a first layer, a stretchable electrode layer provided on the first layer, and a second layer provided on the stretchable electrode layer. The stretchable electrode layer includes a first stretchable receiver electrode and a stretchable transmitter electrode. The liquid level sensor can include an electrical connector for coupling the liquid level sensor to a computing device. The computing device can be configured to determine a liquid level within the container and wirelessly transmit data indicative of the liquid level.