doblePRIME (Dissolved Gas Ananlysis Instruments)

  • doblePRIME Delphi
  • : DGA Instrument


    Dissolved Gas Analysis (DGA) Instruments


    The Doble Delphi Instruments are dissolved gas analysis monitors that help you track transformer health by providing early warning signs of problems such as overheating, insulation degradation or mechanical movement within the unit. The Doble Delphi provides this valuable information in real time, second by second.

    The Doble Delphi is immune to oil surges and vacuums that may affect other sensors; in addition, it contains self-testing diagnostics to monitor its own performance.

    The Doble Delphi is available in Standard and Mini models. Each mounts directly to a transformer valve or can be mounted adjacent to the transformer when the need arises.

    Use the Delphi Mini as part of your comprehensive fleet management program or to monitor smaller transformers in a cost-effective manner.



    Patented* vacuum resistant membrane prevents failure during oil surges, maintenance or other activities
    * patents include US and Canada

    Fast response time: getting to 80% of step change in less than 7 minutes means that indications of a problem are given that much sooner and effectively

    Gas selectivity is high – meaning appropriate measurements rapidly, whether single gas or combined gas

    Micro pump option – allowing for oil circulation to ensure oil doesn’t go stale and give misleading results (Available in Standard Delphi)

    Single valve application ensures minimal connection to the transformer

    Robust, field ready device comes complete with self-test and diagnostics automatically performed on the sensor itself

    Only requires one transformer valve for operation



    Single value output

    High accuracy and repeatability

    Micro-pump circulation (Available in the Standard Delphi)

    Vacuum withstand

    Moisture Detection (Available in the Standard Delphi)

    Temperature & Sensor Condition Self Diagnostics

    Continuous Level and trend analysis

    On-line alarms and indicators

    Front-panel configuration and PC based Software

    Communication Options


    Interested in learning more?

         The Doble Delphi: Frequently Asked Questions

         Application Notes:

     Hydrogen and Composite PPM

     Sensor Life and Replacement

     Principal of Operation

     Power Transformer Case Study

     Value Proposition


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