Provided are a method and a device capable of: generating a first alternating current magnetic field passing through a chamber having a cell disposed therein, by using a plurality of primary coils arranged on a first plane; receiving a second alternating current magnetic field by using a plurality of secondary coils arranged on a second plane; and measuring an impedance change of a cell by using the first alternating current magnetic field and the second alternating current magnetic field.

A gas sensor and the drive circuit for the sensor are installed within a mobile electronic device. The gas sensor is intermittently heated to an operating temperature for detecting gases and kept at an ambient temperature for other periods. When a sensor of the mobile electronic device detects that the device is placed in a closed space, the heating of the metal oxide semiconductor is halted. When the sensor detects that the mobile electronic device has been taken out from the closed space, the heating of the metal oxide semiconductor is resumed. The poisoning of the gas sensor by siloxanes or the like is prevented.

The present disclosure relates to a sensor assembly and a control method therefor. The sensor assembly according to the present disclosure may include a plurality of gate lines, at least one detection line, and a plurality of sensors respectively disposed at portions where the plurality of gate lines intersect with the at least one detection line. In this case, the plurality of sensors include an olfactory sensor, a temperature sensor, and a humidity sensor.

Numerous embodiments of a bubble detection apparatus and method are disclosed. In one embodiment, a bubble detection module is placed into a liquid to be monitored. The module comprises a physical structure housing a nanowire sensing element. The liquid flows through the physical structure. An electric bias is placed across the nanowire sensing element, and the resistance of the nanowire sensing element changes when a bubble is in contact with the element. A change in voltage or current of the bias signal can be measured to identify the exact instances when a bubble is in contact with the nanowire sensing element.

A device includes an upper metallic layer, a lower layer, and a memory array positioned between the upper and lower layers, wherein the memory electrical characteristic changes when storing data.

A device includes an upper metallic layer, a lower layer, and a nano sensor array positioned between the upper and lower layers to detect a presence of a gas, a chemical, or a biological object, wherein each sensor's electrical characteristic changes when encountering the gas, chemical or biological object.

According to one embodiment, a sensor element capable of detecting a target substance contained in an atmosphere is disclosed. The sensor includes a graphene, a drain electrode provided on the graphene, a source electrode adhered to the graphene, and a first substance provided on the graphene and having a charge condition. The charge condition is changed when irradiation of light and stopping of the irradiation of the light are performed. The target substance is detectable by measuring current that flows between the source electrode and the drain electrode. The measuring of the current is performed in a period during which the irradiation of the light and the stopping of the irradiation of the light are repeated above the sensor element.

In an embodiment a method is described which includes emplacing a sample within a measurement cell, wherein two or more electrodes are configured in the measurement cell; introducing a reactive fluid into the measurement cell; reacting the sample with the reactive fluid, wherein reacting the sample with the reactive fluid results in a change in an ion concentration in the reactive fluid; and measuring the resistivity of the reactive fluid using the two or more electrodes, wherein the resistivity is proportional to the ion concentration in the reactive fluid.

A device and method for measuring the internal impedance of an electronic sensor uses configurable gain stages to selectively apply different excitation signals to the sensor under test in order to ensure adequate signal-to-noise ratio to provide accurate measurement of the internal impedance over a broader range of internal impedances than the prior art.

A gas sensing device includes gas sensors for generating signal samples corresponding to a concentration of a gas; a heat source for heating the gas sensors according to a first temperature profile during recovery phases and according to a second temperature profile during sense phases, a preprocessing processor for preprocessing the received signal samples; a feature extraction processor for extracting feature values from the preprocessed signal samples; a humidity processor for estimating a humidity value of the mixture of gases, including a first trained model based algorithm processor, and wherein the humidity value is based on an output of the first algorithm processor; a gas concentration processor for creating sensing results, wherein the gas concentration processor comprises a second trained model based algorithm processor, wherein the sensing results are based on output values of the second algorithm processor, and wherein the sensing results depend on the humidity value.