01.1 GDC


  • Visual indication of density level.
  • Up to 4 switching levels and independent changeovercontacts with decreasing or increasing thresholds(up to 3 on GDH).
  • Based on reference chamber principle for ultimatestability and repeatability.
  • Follows SF6 Isochor (temperature vs. pressure curve), even in liquid phase, meaning no false alarms in low temperatures.
  • Pressure and reference chamber bellows made from stainless steel.
  • High resolution- can detect even the smallest leaks.
  • Can be configured for use on mixed gas switchgear (SF6 /N2; SF6 /CF4).
  • Use of micro-switches to eliminate contact bouncing.
  • Shock proof up to 50G on 3 axes.
  • IP65- Designed for outdoor installation
  • Maintenance free.
  • SF6 sample and reference chamber insulated fromoutside covering.
  • Switching tolerance < 0.2 bar.
Gas density controller - ELECTRONSYSTEM MD


  • Able to calibrate a “Self-diagnosis” contact for monitoring the reference chamber and alert user should leakage occur. The device would still function normally if there was a leak in the measuring bellow.
  • Available with digital or analogue output signal for continuous monitoring (GDHC); typically used with remote monitoring devices which totalize fugitive SF6 emissions and/or provide SF6 refill maintenance forecasting.
  • Customized gas connections.
  • Low temperature version available (-60°C).