[ instrumentation ]
to the low thermal dimensions of the sensors by the micromechanical structures . Proof of a large dynamic range has already been provided beyond doubt for this sensor principle . Thus , the same sensor can measure low hydrogen concentrations in air for room monitoring , some vol % hydrogen in oxygen for lower explosion level monitoring , high up to upper explosion levels , as well as quantitative hydrogen purity . Research on the micromechanical solutions also led to the development of sensors that enable the inherently difficult delineation of hydrogen and helium with similar thermal conductivity ( a pilot project funded by the German state of Hesse , currently in the prototype phase ).
In addition , innovative measuring systems , such as those from Archigas , have other properties that make them well-suited for specific industry needs , thanks to their meticulous design and construction . For instance , let us consider hydrogen measurement in electrolysers with its typical requirements . The sensor units not only have a compact design , but they are also completely equipped with metal-to-metal connections . This feature ensures high leak tightness and chemical resistance . Additionally , process gas temperatures of up to 100 ° C are possible , and in some cases even higher . Thanks to stainless steel housings and IP67 protection , the devices can also be used safely in harsh environments , and the gas-carrying parts and the sensor itself are corrosion-resistant . The gas path is made of high-quality stainless steel , and the sensor is completely glazed on the gas side . Furthermore , these devices enable continuous online quality monitoring of hydrogen . An internal memory can store measurement parameters for a wide variety of gas pairs , so that the devices can be easily adapted to changing measurement requirements . In short , sensor solutions of this design are excellently equipped for increasingly precise , reliable , safe , and extremely easy-toperform hydrogen measurement .
Cost-effective
Modern sensor systems now meet the metrological , or qualitative , requirements better than ever before . However , the industry also faces significant quantitative challenges in the broad-based development of hydrogen as an energy carrier . There is a growing need for corresponding sensors everywhere , including in the increased exploration of ( natural ) hydrogen
Precise measurement provides safety
Hydrogen Tech World | Issue 11 | August 2023 33