Calisto 2

Hydrogen, Moisture + Carbon Monoxide Detection Monitor

Combine early fault detection and monitoring of cellulose degradation. Calisto 2 is innovative for its value-added transformer fault detection and monitoring. Still featuring unequaled performance and stability for the measurement of moisture and dissolved hydrogen—the key gas for detecting incipient faults at their earliest stage—Calisto 2 also offers independent measurement of carbon monoxide, a gas often generated in large quantities when transformer cellulose overheats. Calisto 2 is supplied standard with DNP3.0 and MODBUS communication protocols, thus allowing easy deployment within existing communications and SCADA networks.

  • Additional measurement of dissolved carbon monoxide
  • 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
  • Be alerted to accelerated aging of solid insulation
  • Make informed maintenance decisions
  • Easily install and integrate monitor within existing operations
  • Be alerted to any monitor malfunction and low oil circulation
  • Easily replaced with Calisto 5 or Calisto 9 if required
Sensors & accessories

Calisto Expert Series products are designed to optimize and enhance the use of your Calisto monitors.

Oil Temperature Sensor

  • Reports %RH at Real Temperature
  • Truly Accurate
  • EMC Immune
  • No Calibration Required
  • Designed for Harsh Environments
  • 30-Minute Installation

Sensors & accessories

Stainless Steel Lines

  • Easy to Install
  • Customizable
  • Safe
  • Built to Last

Sensors & accessories

Isolated Ethernet Kit

  • Customizable
  • Easy Communication
  • UV and Oil Resistant
  • Can Withstand the Worst Climates