Flender/Flender Gear Units/Helical gearboxes H4
ion, an optional trend indicator ( can be used to provide visual control. Fig. 2The density monitors are filled at

the works to the customers density specification. ADVANTAGES: effective temperature compensation thanks reference gas measurement identical gas in both, switchgear

and reference chamber. Filling on customers request. galvanically separated circuits no false alarms at low temperatures maintenance-free, no recalibration of

switchpoints high-grade steel movement high resistance against vibration & shock optical trend indicator for exact switchpoint monitoring measurement of other

gases (.. CF possible For detailed information of the product models please consult the data sheets.Fig. 2 Isochoren (Dampfdruckkurve, Linien gleicher Gasdichte von SF Isochores (Vapour pressure diagram, lines equal to gas density SF Fig. 1 Wirkungsweise Gasdichtewchter Function Gasdensitycontroller6 Anzeige Display 5 Mikroschalter Microswitch 4 Schaltstange Perche de manoeuvre 3 Referenz-Gas Reference gas 2 Metallbalg Metal belows 1 SF 6-Gas-Anlageteil SF6 gas installation part ELEKTRONISCHE GASDICHTESENSOREN Trafag gas density sensors are alternative devices to mechanical gas density controllers and function fully electronically. With its patented, electronic measurement devices, Trafag opens new paths for the energy distribution industry to realize comprehensive surveillance or trend analysis of switchgear components. Gas density sensors allows continuous acquisition and analysis of measurement values. They can be used in the open without any protection. OPERATING PRINCIPLE The consistent resonant frequency of quartz oscillator under vacuum (Fig. is compared with the resonant frequency of an identical quartz situated in the sample gas. The difference in the resonant frequency is proportional to the density of the sample gas. This difference is processed into digital (Fig. 3& or analogue (Fig. output signal. In addition, the tempe