A gas sensor having a housing with first and second chambers featuring a porous separator located there between. The first chamber of the sensor being connected to atmosphere via a gas diffusion aperture. The gas sensor having a sensing electrode disposed within the first chamber and at least a second electrode disposed within the second chamber. The sensor having an ionic liquid electrolyte disposed within the second chamber where the sensing electrode and at least second electrodes comprise platinum.

Disclosed herein is a sensor for measuring perfluoroalkyl acids and/or polyfluoroalkyl acids. The sensor includes a working electrode, a counter electrode and optionally a reference electrode. The working electrode includes a film disposed on the surface of the working electrode and the film includes a perfluorinated anion exchange ionomer. A method of using the sensor to detect perfluoroalkyl acids and/or polyfluoroalkyl acids is also described.

A battery-powered analyte sensing system includes a printed battery and an analyte sensor. The printed battery includes an anode composed of a non-toxic biocompatible metal, a first carbon-based current collector in electrical contact with the anode, a three-dimensional hierarchical mesoporous carbon-based cathode, a second carbon-based current collector, and an electrolyte layer disposed between the anode and the cathode, the electrolyte layer configured to activate the printed battery when the electrolyte is released into one or both the anode and the cathode. The analyte sensor includes a sensing material and a reactive chemistry additive in the sensing material.

An all-electronic high-throughput detection system can perform multiple detections of one or more analyte in parallel. The detection system is modular, and can be easily integrated with existing microtiter plate technologies, automated test equipments and lab workflows (e.g., sample handling/distribution systems). The detection system includes multiple sensing modules that can perform separate analyte detection. A sensing module includes a platform configured to couple to a sample well. The sensing module also includes a sensor coupled to the platform. The sensing module further includes a first electrode coupled to the platform. The first electrode is configured to electrically connect with the sensor via a feedback circuit. The feedback circuit is configured to provide a feedback signal via the first electrode to a sample received in the sample well, the feedback signal based on a potential of the received sample detected via a second electrode.

An electrochemical gas sensing element has a footprint of less than 5 mm×5 mm so the volume of electrolyte, the sizes of the electrodes, and the electrical interconnects are very small. This results in a fast stabilization after detecting gasses and enables rapid changes in bias voltage to target different gasses. The sensor body is ceramic, and the other components are stable at temperatures including solder reflow temperatures, thus allowing the use of conventional solder reflow techniques to mount the sensing element to a PCB. A sensor circuit is mounted on the sensing element body to detect the currents through the sensor electrode and digitally process the information, resulting in a more accurate analysis. The small size, low power consumption, and modularity allow the sensor element to be mounted in small handheld devices.

An electrochemical chlorine gas sensor is disclosed with a working electrode, a counter electrode, and a reference electrode. The working electrode may be coated with a nanoporous gold layer, a first solution comprising an ionic liquid, and a second solution that may be selected from a Nation solution, a chitosan solution, an agar solution, or combinations thereof. The reference and counter electrodes may be further coated with the ionic liquid.

An electronic device includes a casing, a speaker enclosure and an actuating and sensing module. The casing has an opening. The speaker enclosure is disposed within the casing to enclose a speaker, in communication with the opening of the casing and divided into a first speaker compartment and a second speaker compartment by a partition plate disposed corresponding to the opening, so that the opening of the casing is in communication with the first speaker compartment and the second speaker compartment. The actuating and sensing module is disposed within the first speaker compartment. The speaker is disposed within the second speaker compartment. The actuating and sensing module comprises a fluid transportation device and a sensor. The fluid transportation device is driven to transport a fluid from outside the casing into the first speaker compartment through the opening of the casing to make the fluid sensed by the sensor.

A printed gas sensor is disclosed. The sensor may include a partially porous substrate, an electrode layer, an electrolyte layer, and an encapsulation layer. The electrode layer comprises one or more electrodes that are formed on one side of the porous substrate. The electrolyte layer is in electrolytic contact with the one or more electrodes. The encapsulation layer encapsulates the electrode layer and electrolyte layer thereby forming an integrated structure with the partially porous substrate.

An electrochemical gas sensor (10) with a housing (11), with an electrolyte reservoir (12) and with a plurality of electrodes (31, 32, 33). The electrodes (31, 32, 33) include at least one working electrode (31), one counterelectrode (32) and one reference electrode (33). The electrolyte reservoir (12) is filled with a liquid electrolyte (60). All of the electrodes (31, 32, 33) are arranged at or on a common electrode carrier (20).

The invention relates to an electrochemical gas sensing apparatus for sensing one or more analytes, such as NO.sub.2 and/or O.sub.3, in a sample gas and a method of using same. The apparatus uses Mn.sub.2O.sub.3 as a filter for ozone. The Mn.sub.2O.sub.3 may take the form of a powder which may be unmixed, mixed with various PTFE particles sizes, formed into a solid layer deposited onto a membrane and/or pretreated with NO.sub.2.