The Calisto 5 is Morgan Schaffer’s 5-gas on-line monitor that provides key DGA data in a high-value package, Morgan Schaffer’s proprietary gas chromatography system and substation hardened electronics deliver a high-performance on-line DGA solution with the accuracy and reliability you have come to trust.


  • Additional measurement of Duval Triangle gases
  • Acetylene measurement from 0.2 ppm
  • Automated self-calibration using certified primary grade gas
  • Intuitive front-panel display interface
  • Built-in oil circulation and flow monitoring
  • Continuous enclosure and oil conditioning
  • Communication protocols: DNP3, Modbus, IEC 61850 (optional)
  • Vacuum tolerant
  • Substation hardened communication electronics
  • Built-in moisture and solubility coefficients for all common insulating fluids


  • Identify arcing at the earliest onset
  • Add continuous Duval Triangle diagnosis to incipient fault detection
  • Ensure concurrence with laboratory data (short-term and long-term)
  • View data and monitor status on-site without tools or computers
  • Low ownership cost


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