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 D1 series Holliday detector
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  • D1 series Holliday detector is used to detect oil and gas pipelines, cables, enamel, metal tanks

    the hull construction quality of the metal surface coating and micro porous aging corrosion points

    dedicated testing equipment of the air gap is auniversal version of the Holliday detector. 

    For newly constructed tanks, pipelines and other installations, where corrosion prevention coatings 

    have had to be applies, specifications will normally call for a specific coating to a specific thickness. 

    With corrosion an extremely costly and disruptive worldwide problem, preventative determination becomes 

    essential.
    [Features]
    1, low power consumptionsmall size, light weight; 
    2, simple operation, intuitive and convenient;
    3, the Dial pointer header indicates the output voltage and supply voltage;

  •  Model

    D1-A

    D1-B

    D1-C

    Detect range

    0.03-3.5mm

    Coal tar epoxy (medium)

    3.5-10.mm

    Petroleum asphalt (medium)

    0.03mm~10mm

    Petroleum asphalt, Coal tar epoxy

    Output voltage

    0.5-15KV

    15-35KV

    0.5KV~35KV

    DC power supply

    12V

    Display screen

    Dial

    the high-voltage control system: 

    ordinary potentiometer adjustment

    Power consumption: 

    <5w

    the alarm delay 

    1-2 seconds

    the high-pressure gun: 

    Microelectronics high-voltage generator

    Weight

    1.5kg with Battery

    Dimensions

    165mm×155mm×68mm

    165mm×155mm×68mm

    165mm×155mm×68mm

    Packaging: 

    metal box

    metal box

    metal box

  • [Testing principles and methods] 
        Leak detection principle: metal surface insulating coating is too thin, iron leakage and leakage porous

     at the resistance value and density of the air gap is very small, when there are high-voltage spark discharge after the formation of air gap breakdown, to the alarm circuit to generate a pulse 

    signal alarm audible and visual alarm, according to this principle of the

     coating leak detection purposes. 

  • Charger, 

    high voltage gloves,

     long cable, 

    short cable to connect the magnet, 

    the plate probe brush, 

    grounding rods, 

    documents 

 
 
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