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Kelman DGA 900

The Kelman™ DGA 900 is an 9-gas on-line transformer DGA monitoring unit. Using our 4th generation of advanced photo-acoustic detection technology, the DGA 900 measures all significant fault gases (in ppm) as outlined by international standards as well as moisture in oil (%RH & ppm). The measurement of these gases allows the user to detect and diagnose a complete range of transformer faults.




  • Provides remote alert and multi-gas diagnostic of deteriorating transformer condition

  • Expedites operational decisions without needing to go to site for manual oil sampling

  • Issues can be detected in their infancy, avoiding unexpected failures and facilitating planned outages

  • Anchors condition based maintenance and asset replacement strategies on hard data

  • No need for consumables or frequent recalibration to operate at optimum performance

  • New “Rapid Mode” provides near real time insight on fast developing faults

  • Enhanced computing power, highly scalable I/Os and integrated HMI combine to provide a powerful highly flexible transformer monitoring solution

  • Compatible with mineral insulating oils and newer ester based fluids (natural and synthetic)




  • DGA & Water – Nine gases (hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide, nitrogen and oxygen) plus moisture

  • Inputs/Outputs for additional sensors including load and oil temperature

  • Full DGA results down to once per hour and new “Rapid Mode” for critical gases in just 30 minutes

  • Integrated 7” colour LCD screen for simplified local user interaction and visualisation of data

  • Innovative two enclosure design enables adjacent or separated installation arrangements to better accommodate varied site conditions

  • Communication Options – Extensive local and remote communications options

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DGA 900 Brochure

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