ST-AC Pro’ AC spark tester – standard kit


The ST-AC Pro’ AC high frequency portable AC spark tester provides a quick and effective means of inspecting thicker coatings and linings. It is particularly useful for checking butt-welded and overlap joints on plastic fabrications.

The ST-AC Pro’ can detect flaws and defects in non-conductive membranes up to 30mm in thickness and is extensively used in the petrochemical, pipeline construction, plastic and rubber manufacturing industries.

Fully CE compliant, the ST-AC Pro’ is supplied with a 150mm flexible probe which is suitable for most uses.

Insulated extension rods, electrodes and accessories are available for specific applications. To ensure stability of the output voltage, the maximum recommended electrode size is 150mm for all high frequency equipment.

Standard kit comprises:

  • ST-AC Pro’ unit with test probe handle
  • 150mm flexible probe
  • 2m mains lead
  • Comprehensive instruction manual


  • Output voltage range: 10-55kV peak high-frequency AC
  • Output frequency: 100kHz ring pulsed at 50Hz @ 50Hz mains supply
  • Mains voltage: 110 or 230V AC 50/60Hz
  • Weight (unit only): 4.05Kg
  • Dimensions (unit only): 175mm x 90mm x 235mm
  • Weight (handle): 0.6Kg
  • Dimensions (handle): 30cm x 8cm
  • Packed weight (standard kit): 6Kg
  • Dimensions (packed): 370mm x 360mm x 300mm
  • Compliant with CEN/TC 249/SC5/WG2 Testing of Welded Joints (PREN 13100-4 HV Testing)
Note: Due to ongoing technical developments, all stated information is typical and is subject to change without notice or obligation. Commodity Code: 9027802000


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