F.A.Q.


When should I use a low-voltage wet sponge detector versus a high-voltage spark tester?

Low-voltage wet sponge detectors (like the PosiTest LPD) are used exclusively on thin coatings under 500 µm (20 mils) where high voltage might arc through sound coating. High-voltage spark testers are required for thicker protective barrier coatings exceeding 20 mils.

How is the correct test voltage calculated for high-voltage Holiday Detectors?

Test voltage is determined by the specific coating thickness and applicable test standards (such as NACE SP0188 or ASTM D5162). Modern instruments like the PosiTest HHD feature a built-in voltage calculator where selecting the standard and entering coating thickness automatically calculates the required voltage.

Why is proper grounding critical during Holiday Detection?

A Holiday Detector completes an electrical circuit through the coating fault to the conductive substrate and back to the instrument earth clamp. If the substrate is not properly grounded to earth or if the ground lead has poor electrical contact, the detector will fail to register pinholes and flaws.

DeFelsko HHDKIT PosiTest HHD Kit High Voltage Holiday Detector

$3,895.00
FREE 2-Day Shipping
About this item
  • Easy-to-use with bright, multicolor LCD
  • Strobe light and loud audible alarms emitted when a holiday is detected. Audio alarm mode can be adjusted for differing
  • Rugged, environmentally sealed ABS plastic enclosure

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DeFelsko HHDKITB PosiTest HHD Basic Kit High Voltage Holiday Detector

$3,465.00
FREE 2-Day Shipping
About this item
  • Easy-to-use with bright, color LCD
  • Ready to measure—comes with everything needed for testing
  • Audibly and visibly alerts when flaws/holidays are detected

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DeFelsko HHDCKIT PosiTest HHD C Kit High Voltage Holiday Detector

$2,995.00
FREE 2-Day Shipping
About this item
  • Lightweight, one-piece ergonomic design provides comfortable all-day use, reducing operator fatigue
  • No shoulder bag required! All electronics, batteries, and connectors are integrated into a single handheld wand
  • User adjustable voltage range from 0.5 — 30 kV

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PCWI Compact DC High Voltage Holiday Detector DC15 & DC30

$3,087.00 - $3,468.00
FREE Ground Shipping
About this item
  • PCWI Compact DC High Voltage Holiday Porosity Detectors
  • Measuring Ranges:
    Model DC15: 0 to 15,000 Volts (DC15IND or DC15PIPE)
    Model DC30: 0 to 30,000 Volts (DC30IND or DC30PIPE)

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PCWI Compact Pulse High Voltage Holiday Detectors P20 and P40

$3,468.00 - $3,614.00
FREE Ground Shipping
About this item
  • PCWI Compact Pulse High Voltage Holiday Porosity Detectors
  • Measuring Ranges:
    Model P20: 2,000 to 20,000 Volts (P20IND or P20PIPE)
    Model P40: 5,000 to 40,000 Volts (P40IND or P40PIPE)
  • Resolution: 100 Volts

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ElektroPhysik PoroTest-7 High Voltage Porosity Holiday Detector

$2,915.00
FREE Ground Shipping
About this item
  • PoroTest 7 High Voltage Porosity Holiday Detector, designed for detecting flaws and pores (holidays)

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DeFelsko LPDKITB PosiTest LPD Low Voltage Pinhole Detector Basic Kit

$495.00
FREE 2-Day Shipping
About this item
  • Easy-to-use interface with bright, multi-function LEDs
  • Rugged, environmentally sealed enclosure
  • Automatic self-test verifies voltage calibration

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DeFelsko LPDKITC PosiTest LPD Low Voltage Pinhole Detector Complete Kit

$1,265.00
FREE 2-Day Shipping
About this item
  • Easy-to-use interface with bright, multi-function LEDs
  • Rugged, environmentally sealed enclosure
  • Automatic self-test verifies voltage calibration

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PCWI Compact Wet Sponge Low Voltage Pinhole Tester 0789 WETSPONGE

$583.00
FREE Ground Shipping
About this item
  • PCWI Wet Sponge Pinhole Detector by PCWI 0789 / WETSPONGE
  • Measuring Range:
    0 to 20 mils (0 to 500 µm)
  • Test Voltage:
    Selectable 9, 67.5 or 90V

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PCWI Compact DC High Voltage Holiday Detector DC15 & DC30

$3,087.00 - $3,468.00
FREE Ground Shipping
About this item
  • PCWI Compact DC High Voltage Holiday Porosity Detectors
  • Measuring Ranges:
    Model DC15: 0 to 15,000 Volts (DC15IND or DC15PIPE)
    Model DC30: 0 to 30,000 Volts (DC30IND or DC30PIPE)

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PCWI Compact Pulse High Voltage Holiday Detectors P20 and P40

$3,468.00 - $3,614.00
FREE Ground Shipping
About this item
  • PCWI Compact Pulse High Voltage Holiday Porosity Detectors
  • Measuring Ranges:
    Model P20: 2,000 to 20,000 Volts (P20IND or P20PIPE)
    Model P40: 5,000 to 40,000 Volts (P40IND or P40PIPE)
  • Resolution: 100 Volts

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PCWI Compact Wet Sponge Low Voltage Pinhole Tester 0789 WETSPONGE

$583.00
FREE Ground Shipping
About this item
  • PCWI Wet Sponge Pinhole Detector by PCWI 0789 / WETSPONGE
  • Measuring Range:
    0 to 20 mils (0 to 500 µm)
  • Test Voltage:
    Selectable 9, 67.5 or 90V

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PCWI High Voltage DC Crest Meter

$561.00 - $869.00
FREE Ground Shipping
About this item
  • PCWI High Voltage Direct Current Crest Meter, Jeep Meter or Volt Meter
  • New Part. No. DCCREST - Old Part No. 1095
  • Measuring Range:
    0 to 30kV
  • Manufacturer: PCWI

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PCWI High Voltage Pulse Crest Meter

$602.00 - $1,030.00
FREE Ground Shipping
About this item
  • PCWI High Voltage Pulse Crest Meter, Jeep Meter or Voltmeter
  • Measuring Range: 5 to 30kV
  • For verifying output voltage and the calibration of PCWI Compact Pulse type Porosity and Holiday Detectors ONLY

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PCWI Circular Pipeline Coils

$128.00 - $454.00
About this item
  • Circular Pipeline Coils - Full Circle Spring Electrodes
  • Available in diameters of 2" (50mm) to 56" (1420mm)
  • Manufacturer: PCWI
  • Warranty: One Year

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PCWI Flat Brush Electrodes

$52.00 - $587.00
About this item
  • PCWI Flat (Straight) Brush Electrodes for Porosity Holiday Detectors
  • Straight Flat Brass Brush Electrodes
  • Available in diameters of 2" (50mm) to 24" (600mm)

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PCWI Circular Internal Brush Electrodes

$110.00 - $600.00
About this item
  • Internal Circular Brush Electrodes for Porosity Holiday Detectors
  • Internal Pipeline Disk & Spiral Wound Brushes
  • Available in diameters of 2" (50mm) to 20" (508mm)

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PCWI External Rolling Pipeline Brushes

$279.00 - $920.00
FREE Ground Shipping
About this item
  • External Rolling Pipeline Brushes for Porosity Holiday Detectors
  • Available in diameters of 1" (25mm) to 20" (508mm)
  • Manufacturer: PCWI
  • Warranty: One Year

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PCWI COILJOIN450PRBEXT Coil Joiner with 450mm Probe Extension

$215.00
FREE Ground Shipping
About this item
  • Coil Joiner for PCWI pipeline coils & external pipe brushes with 450mm extension
  • A coil joiner (COILJOINERONLY) is required to connect the coil ends together and to the PCWI detector handle

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PCWI PRBHANDLEDC Probe Handle for DC Complete

$282.00 - $386.00
FREE Ground Shipping
About this item
  • Yellow probe handle for the PCWI DC Holiday Detectors
  • DC probe handle comes complete with lead, plug, neon holder & neon
  • Length of lead, 2m

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DeFelsko HHDKIT PosiTest HHD Kit High Voltage Holiday Detector

$3,895.00
FREE 2-Day Shipping
About this item
  • Easy-to-use with bright, multicolor LCD
  • Strobe light and loud audible alarms emitted when a holiday is detected. Audio alarm mode can be adjusted for differing
  • Rugged, environmentally sealed ABS plastic enclosure

View More Details

DeFelsko HHDKITB PosiTest HHD Basic Kit High Voltage Holiday Detector

$3,465.00
FREE 2-Day Shipping
About this item
  • Easy-to-use with bright, color LCD
  • Ready to measure—comes with everything needed for testing
  • Audibly and visibly alerts when flaws/holidays are detected

View More Details

DeFelsko HHDCKIT PosiTest HHD C Kit High Voltage Holiday Detector

$2,995.00
FREE 2-Day Shipping
About this item
  • Lightweight, one-piece ergonomic design provides comfortable all-day use, reducing operator fatigue
  • No shoulder bag required! All electronics, batteries, and connectors are integrated into a single handheld wand
  • User adjustable voltage range from 0.5 — 30 kV

View More Details

DeFelsko PosiTest HHD Verifier

$690.00 - $710.00
FREE Ground Shipping
About this item
  • Ideal for field / laboratory verification of pulse or continuous DC holiday detectors
  • Wide measurement range
  • Simple two step operation

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DeFelsko HHDSPRING Rolling Spring Electrodes

$121.00 - $237.00
About this item
  • Includes two pre-installed spring couplers
  • For DeFelsko PosiTest HHD

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DeFelsko HHDFLTBRSH Flat Wire Brush Electrodes

$94.00 - $754.00
About this item
  • Assorted sizes available: 5 to 120 cm (2 - 48")
  • For DeFelsko PosiTest HHD series

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DeFelsko HHDHCBRSH5 Half-Circle Brush Electrodes

$215.00
FREE Ground Shipping
About this item
  • Good for pipes 50 to 127 mm / 2 to 5 inches
  • For DeFelsko PosiTest HHD

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DeFelsko Electrode Adaptors

$47.00 - $88.00
About this item
  • PCWI Adaptor
  • Tinker & Rasor Adaptor
  • 266 & 280 Adaptor

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DeFelsko Replacement Batteries

$88.00 - $198.00
About this item
  • DeFelsko HHDBATTERY Replacement Li-ion Battery 72 Wh for PosiTest HHD
  • DeFelsko HHDCBATTERY Replacement Li-ion Batteries 18650 (Pack of 4) for PosiTest HHD C

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DeFelsko LPDKITB PosiTest LPD Low Voltage Pinhole Detector Basic Kit

$495.00
FREE 2-Day Shipping
About this item
  • Easy-to-use interface with bright, multi-function LEDs
  • Rugged, environmentally sealed enclosure
  • Automatic self-test verifies voltage calibration

View More Details

DeFelsko LPDKITC PosiTest LPD Low Voltage Pinhole Detector Complete Kit

$1,265.00
FREE 2-Day Shipping
About this item
  • Easy-to-use interface with bright, multi-function LEDs
  • Rugged, environmentally sealed enclosure
  • Automatic self-test verifies voltage calibration

View More Details


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