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Welcome to ANNED Regeltechnik GmbH

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Special solutions to meet the highest demands for operational safety and reliability have been developed by ANNED Regeltechnik GmbH for the power generation, transmission, and distribution sector.  ANNED has especially developed temperature-compensated pressure gauges for use in switchgear that ensure safe operation of SF6 gas-insulated equipment.  Learn More...

  • high-voltage air-insulated substations (AIS)
  • high-voltage gas-insulated substations (GIS)
  • gas-insulated high-voltage cables
  • instrument transformers
  • transformers

SF6 Gas Density Monitors:

Normal pressure gauges are not suitable for this monitoring operation because with the same gas density, the gas pressure is dependent on the gas temperature in closed gas systems.  This dependency is is specific to the used gas and is shown in a vapor pressure diagram with lines of identical density, the so-called isochores.  Therefore the temperature must also be registered by suitable monitoring systems working on the pressure measuring principle.  This enables the monitoring unit to correct the measured pressure value according to the isochores.  Such special pressure gauges/transmitters are the gas density monitors as described herein.

ANNED produces mechanical SF6 gas density monitors which is identical to the specs of SF6 gas density monitors from WIKA in a variety of versions.