Abstract: An apparatus and associated a method are described for performing gas analysis on a gas sample. The method comprising exciting the gas sample with one or more electromagnetic energy sources and obtaining optical absorption signals associated with the gas sample prior to application of a catalytic process to the gas sample as well as during and/or after application of the catalytic process to the gas sample. The obtained optical absorption signals may then be processed using differential calculation approaches to derive information associated with the gas sample, which may include for example information conveying concentrations of certain specific gases in the gas sample. In some implementations, the optical absorption measurement system is configured to use the one or more electromagnetic energy sources to excite the gas sample to produce first optical absorption signals.

Abstract: A self-calibrating dissolved gas analysis apparatus and associated method are described. The dissolved gas analysis apparatus includes an analyser having an optical absorption measurement system using one or more electromagnetic energy sources to obtain optical absorption measurements associated with a gas sample. An observed response of the optical absorption measurement system is derived at least in part by using the optical absorption measurement system to obtain optical absorption measurements for a reference gas under one or more distinct moisture conditions. The derived observed response is then processed to quantify deviations between the derived observed response and an expected response and the quantified deviations are used to compensate information associated with gas concentration measurements derived by the dissolved gas analysis apparatus.

Abstract: An apparatus and associated a method are described for performing gas analysis on a gas sample. The method comprising exciting the gas sample with one or more electromagnetic energy sources and obtaining optical absorption signals associated with the gas sample prior to application of a catalytic process to the gas sample as well as during and/or after application of the catalytic process to the gas sample. The obtained optical absorption signals may then be processed using differential calculation approaches to derive information associated with the gas sample, which may include for example information conveying concentrations of certain specific gases in the gas sample. In some implementations, the optical absorption measurement system is configured to use the one or more electromagnetic energy sources to excite the gas sample to produce first optical absorption signals.

Abstract: An apparatus and associated a method are described for performing gas analysis on a gas sample. The method comprising exciting the gas sample with one or more electromagnetic energy sources and obtaining optical absorption signals associated with the gas sample prior to application of a catalytic process to the gas sample as well as during and/or after application of the catalytic process to the gas sample. The obtained optical absorption signals may then be processed using differential calculation approaches to derive information associated with the gas sample, which may include for example information conveying concentrations of certain specific gases in the gas sample. In some implementations, the optical absorption measurement system is configured to use the one or more electromagnetic energy sources to excite the gas sample to produce first optical absorption signals.

Abstract: A self-calibrating dissolved gas analysis apparatus and associated method are described. The dissolved gas analysis apparatus includes an analyser having an optical absorption measurement system using one or more electromagnetic energy sources to obtain optical absorption measurements associated with a gas sample. An observed response of the optical absorption measurement system is derived at least in part by using the optical absorption measurement system to obtain optical absorption measurements for a reference gas under one or more distinct moisture conditions. The derived observed response is then processed to quantify deviations between the derived observed response and an expected response and the quantified deviations are used to compensate information associated with gas concentration measurements derived by the dissolved gas analysis apparatus.

Abstract: An apparatus and associated a method are described for performing gas analysis on a gas sample. The method comprising exciting the gas sample with one or more electromagnetic energy sources and obtaining optical absorption signals associated with the gas sample prior to application of a catalytic process to the gas sample as well as during and/or after application of the catalytic process to the gas sample. The obtained optical absorption signals may then be processed using differential calculation approaches to derive information associated with the gas sample, which may include for example information conveying concentrations of certain specific gases in the gas sample. In some implementations, the optical absorption measurement system is configured to use the one or more electromagnetic energy sources to excite the gas sample to produce first optical absorption signals.

Abstract: An apparatus is described for performing dissolved gas analysis on electrical equipment having components immersed in electrical insulating liquid. The apparatus comprises an analyzer including a photo-acoustic spectroscopy (PAS) measurement system for performing gas analysis on a gas sample wherein the PAS measurement system has an elongated channel including a resonant cavity and an electromagnetic energy source. The resonant cavity includes a first portion and a second portion configured for containing at least part of the gas sample, wherein the first portion defines an optical pathway configured for propagation of electromagnetic energy from the electromagnetic energy source. The resonant cavity includes an element configured for obstructing the propagation of the electromagnetic energy through to the second portion of the resonant cavity.

Abstract: A reader for article identification comprises one or more solenoids configured to generate a magnetic field for locally exciting portions of a marker element carrying at least one data feature as the marker element moves through the magnetic field and for causing the marker element to generate a varying magnetic field; and one or more giant magnetoimpedance (GMI) sensors upstream of the one or more solenoids configured to detect the varying magnetic field and produce output based on the varying magnetic field.

Abstract: A reader for article identification comprises one or more solenoids configured to generate a magnetic field for locally exciting portions of a marker element carrying at least one data feature as the marker element moves through the magnetic field and for causing the marker element to generate a varying magnetic field; and one or more giant magnetoimpedance (GMI) sensors upstream of the one or more solenoids configured to detect the varying magnetic field and produce output based on the varying magnetic field.