A gas sensor includes an insulation layer and detection cells covered with the insulation layer. Each of the plurality of detection cells includes: a first electrode; a second electrode having a surface exposed from the insulation layer; and a metal oxide layer disposed between the first electrode and the second electrode. In each of the detection cells, a resistance value of the metal oxide layer decreases with a response time, which is different in each of the detection cells, when a gas containing a hydrogen atom comes into contact with the second electrodes.

A sensor device can include a transition metal complex capable of interacting with a carbon-carbon multiple bond moiety. The sensor can detect the fruit-ripening hormone ethylene with high sensitivity.

Described herein are sensor elements for detecting the presence of organic materials comprising a boron doped n-type semiconductor material with decrease in resistivity upon organic materials exposure with increase in resistivity upon organic materials exposure.

The invention relates to a hydrogen sensor (8) and a method for its production, a measuring device (2), and a method for measuring a hydrogen concentration. The hydrogen sensor (8) for measuring a hydrogen concentration in an environment (4) includes a substrate (10) on which a hydrogen-absorbing sensor medium (14) is applied as a thin film in a sensor region (12) communicating with the environment. The sensor medium (14) changes its volume depending on a hydrogen concentration in the sensor medium (14), and said change of the volume causes a variation of a mechanical strain introduced by the sensor medium (14) in the substrate (10). In a preferred embodiment, the substrate (10) of the hydrogen sensor (8) is a piezoresistive semiconductor, at least within the sensor region (12).

A hydrogel-based interdigitated microelectrode biosensor is disclosed. The hydrogel-based interdigitated microelectrode biosensor includes: a first interdigitated microelectrode having a plurality of first protrusion electrodes arranged in a comb-like shape on a substrate; a second interdigitated microelectrode facing the first interdigitated microelectrode and having a plurality of second protrusion electrodes arranged in a comb-like shape on the substrate, the second protrusion electrodes being arranged alternately with the first protrusion electrodes of the first interdigitated microelectrode; and a hydrogel filled in a space between the first and second interdigitated microelectrodes arranged alternately with each other. The hydrogel is provided between the interdigitated microelectrodes such that the presence and concentration of a biological substance, such as a protein, are detected by measuring the impedance between the interdigitated microelectrodes.

A measuring device for determining a gas concentration includes a gas-sensitive element, a sensing device, a stimulation unit, and a processing unit. The gas-sensitive element is configured to absorb a gas. The sensing device is configured to determine a parameter of the gas-sensitive element in a predetermined time period, where the parameter depends on an absorbed quantity of the gas. The stimulation unit is configured to stimulate the gas-sensitive element and accelerate desorption of the gas out of the gas-sensitive element. The processing unit is configured to determine a rate of change of the parameter, to control the stimulation such that a concentration of the gas in the gas-sensitive element lies outside of an equilibrium state, and to determine the gas concentration based on the rate of change.

This identification apparatus is for identifying the degree of degradation of oil and includes a sensor that detects a substance arising from oil contained in an oil tank and a controller that determines the degree of degradation of the oil based on information related to a substance detected initially by the sensor when the oil is contained in the oil tank in an initial state and on information related to the substance detected subsequently.

This identification apparatus is for identifying the degree of degradation of oil and includes a sensor that detects a substance arising from oil contained in an oil tank and a controller that determines the degree of degradation of the oil based on information related to the substance detected by the sensor and the distance from the oil tank containing the oil to the sensor.

A sensor device configured to accurately identify a volatile compound from water vapor even at high humidity, and a method for manufacturing the sensor device are provided. The sensor device includes a measuring transducer including a pixel array on which volatile compounds and water vapor are condensed and a sensitive porous dielectric layer provided in a form of a plurality of spheres constituting the pixel array, a temperature controller provided around the pixel array, and configured to control temperature of each of pixels constituting the pixel array and temperature of the pixel array, a detection device connected to the measuring transducer, and configured to detect a response pattern of the volatile compounds through the pixel array, an analyzer configured to process, classify, and store the response pattern, a stimulating source connected to the measuring transducer, and configured to stimulate the measuring transducer, and at least one processor.

The present invention generally relates to metal oxide-based sensors and platforms and integrated chemical sensors incorporating the same, methods of making the same, and methods of using the same.