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H70636e_EN_878X_Hybrid_GDM

H70636e_EN_878X_Hybrid_GDM
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Combined technology: local switching / read-out and remote signal Continuous analog signal Ready for SF6 gas management trending systems Very compact all-in-one device Maintenance-free Trafag AG Sensors & Controls tinfaq sensors controls

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Hybrid Gas Density Monitor 878X The Hybrid Gas Density Monitor combines the advantages of the proven mechanical monitor based on the superior reference chamber with the unique electronic gas density sensor. The combined technology has l ocal switches / read-out and allows remote surveillance and trend analysis. The very compact all-in-one- device with a single pressure port operates reliable and maintenance-free under harsh conditions indoors and outdoors. It is accurate over a wide range of temperature and altitude. Advantages No false alarms at low temperatures Mechanical switches AND...

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Operating principle of the electronic gas density sensor The constant resonant frequency of a quartz oscillator under vacuum is compared with the resonant frequency of an identical quartz s ituated in the sample gas. The difference in the resonant frequency SF6 gas density is proportional to the density of the sample gas. This difference is processed into an analogue output signal. Functional diagram: Analogue signal output Electrical connections and wiring diagram Δp (SF6) Finit element stress analysis of an oscillation tuning fork ρ Up to three galvanically isolated micro switches...

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Technical data Subject to change H70636e Trafag AG 05/2014 For other available pressure connections: See data sheet www.trafag.com/H72502 tinfacisensors ^^controls

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