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Mixtures of SF6 and N2 are used in gas-insulated lines to reduce the amount of SF6 in use and thus minimize environmental impact. Outdoor-installed electrical equipment operating in low-temperature regions currently also entails the use of mixtures of SF6 gas with N2 or CF4. The dielectric strength of SF6 mixtures depends on the density and the mixing ratio which can change as a result of leakage...
We developed an in-situ multi-sensor system for measuring the composition of a binary gas mixture. The sensor system simultaneously measures pressure, temperature and density from which the partial pressure of the individual gas components can be deduced and monitored online. In order to achieve highly precise measurements, the key component of the system, a microcrystal density sensor, is temperature-compensated...
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