A conductivity sensor for measuring the electrical conductivity of a liquid medium having at least a first coil, a current source and a control and evaluation unit, the current source being connected to the first coil. The conductivity sensor has the ability to determine a particularly large range of electric conductivity by at least a first electrode and a second electrode and at least one voltage measuring unit being provided, the voltage measuring unit being connected to the first electrode and the second electrode, the control and evaluation unit being connected to the current source and to the voltage measuring unit, and the first electrode and the second electrode being out of electrical contact with the first coil.

A system for detecting disposal of metallic objects into an opening of a medical waste container, including: an indicator for indicating passage of metallic objects through the opening, a pair of receive coils and a transmit coil spaced therebetween shaped for receiving waste therethrough adjacent to the opening, and a controller in electrical communication with the coils. The controller generates and communicates a transmit signal to the transmit coil, which generates a magnetic field that induces voltage in each of the receive coils, which each generate a receive signal. The controller generates a waveform based on the receive signals with a baseline corresponding to absence of metallic objects, and analyzes the waveform with respect to opposite first and second thresholds. The controller activates the indicator in response to metallic objects passing through the coils when the waveform first exceeds the first threshold and then subsequently exceeds the second threshold.

A capacitive oil sensor assembly includes: a main body; a first conductive pad disposed on, or embedded in, the main body; and a conductive reference pad area, disposed on, or embedded in, the main body. The conductive reference pad area is connected to a ground or reference point. A gap or isolation layer separates the first conductive pad and the conductive reference pad area. The sensor assembly also includes: an electrically conductive layer; a first layer made of an oil-absorbing material, the first layer arranged between the electrically conductive layer and the main body, covering the first conductive pad and the conductive reference pad area; and a processing unit configured to measure a capacitance between the first conductive pad and the conductive reference pad area. A method of detecting oil using a capacitive oil sensor assembly is disclosed.

A method for evaluating a cathode slurry for an all-solid-state battery, comprising: measuring an alternating current impedance with respect to a cathode slurry for an all-solid-state battery, in which a cathode active material, a solid electrolyte, a conductive agent and a binder are kneaded and dispersed, and which is sealed in a measurement container provided with electrodes at both ends thereof, identifying a frequency range from data of the measured alternating current impedance; and evaluating quality of coating condition of the solid electrolyte on the cathode active material, based on an imaginary axis parameter of the alternating current impedance in the identified frequency range and a real axis parameter of the alternating current impedance in the identified frequency range.

Penetrating matter (non-organic, organic or biological) with electric fields is shown, to identify one or more properties of the matter. A first electrode (111) is energized and an output signal from a capacitively coupled second electrode (115) is monitored. The output signal is processed to identify properties of the matter (which for biological matter could indicate the presence of cancer). The first electrode and the second electrode are selected from a plurality of electrodes mounted on a first planer surface of a dielectric substrate (401). The electrodes are circumferentially and substantially evenly displaced upon the planer surface around a hole in the substrate.

An inductive conductivity sensor and a method for measuring specific electrical conductivity of a medium, comprising a transmitting coil fed by means of an input signal; coupled with the transmitting coil via the medium; a receiving coil, which delivers an output signal, which is a measure for the conductivity of the medium; and surrounding the transmitting coil and the receiving coil a housing, which has, intended for immersion in the medium, at least one housing section, whose housing wall surrounds the transmitting coil and the receiving coil. The housing section includes at least a first electrically conductive contact intended for contact with the medium and a second electrically conductive contact intended for contact with the medium. The conductivity sensor includes an electrically conductive conductor and the first contact is connected with the second contact via the conductor, wherein the conductor and the electrically conductive contacts are so embodied that they form via an ionic conduction path of the medium a closed electrical current path around the transmitting coil and the receiving coil.

A wireless sensor array communication system includes a plurality of wireless sensors each including a resonant circuit that is excited by an RF pulse so as to provide a resonant energy proportional to a measurand being monitored. A transceiver of an interrogator system transmits RF pulses to each of the sensors to excite the resonant circuits therein and receives RF signals transmitted from each of the sensors that are indicative of the resonant energy provided by the resonant circuit. A magnet-gradient coil arrangement of the interrogator system generates a magnetic field and selectively applies magnetic field gradients along a number of axes, such that a frequency and phase of the resonant energy provided by the resonant circuit of each wireless sensor is altered responsive thereto, with the altered frequency and phase of the resonant energy being a function of a location of the respective wireless sensor within the magnetic field.

This disclosure relates to medical fluid sensors and related systems and methods. In some aspects, a circuit includes a radio frequency coil tuned to at least one frequency and at least one switching circuit directly connected to the radio frequency coil. The radio frequency coil is characterized by a high impedance.

A measurement system permits environmental, corrosion damage, and mechanical property measurements to assess protection properties of coatings. The system includes one or more multi-sensor panels, each multi-sensor panel having sensors for assessing coating barrier properties, free corrosion, and galvanic corrosion. Each multi-sensor panel is installed on a test rack that contains electronics for sensor excitation and sensor data acquisition throughout a corrosion test. Sensor data is collected, stored, and communicated to a base station. A network of multiple test racks can be supported by a base station to compare the performance of different coatings and material combinations simultaneously. The test racks can be used in accelerated atmospheric corrosion tests, outdoor test sites, or application service environments. Measurements of the capacity of a coating to maintain barrier properties, prevent free corrosion, galvanic corrosion, and environment-assisted cracking can be used to develop, select, and predict service performance of coatings.

The invention discloses methods and devices for rapidly detecting a biological and/or chemical residue in a liquid sample. In some embodiments of the instant invention, a single antenna is generally employed in proximity to an aqueous solution in a disposable cup, with electrical outputs being recorded by an electrical metering device in communication with the single antenna. Commercial plastic cups may be used for detection of electric fields related to cleanliness of water samples. General and specific target detection may be performed with various embodiments of the instant invention.