click for Chilworth home click for DEKRA Insight home

CTL44 - Electric Spark Tester

Meets the Energetic Materials Testing & Assessment Policy Committee‘s (Defence Ordnance Group) Manual of Tests (EMTAP)*


  • Compact unit (self-contained)
  • Electronic safety interlock on the door (isolates all power and grounds the high voltage electrode when the door is open)
  • Fast access side hatch for ease of cleaning down between sample tests

electric spark tester

Electric Spark Tester

In general, explosives can be divided into two classes of electrostatic risk. It is possible for an operator to accumulate 0.02 J of energy on his person and for this reason, explosives which can be initiated with energies smaller than 0.02 J require the more stringent Second Degree Precautions. If the explosive requires an energy in excess of 0.02 J for ignition, First Degree precautions are sufficient.

The electrostatic testing of explosives is, therefore, divided into two parts; a screening test to show whether the material is unlikely to be ignited at the 0.02 J level, and a more searching procedure for those materials which are ignited at that level.

* Chilworth Technology manufacture the apparatus required for the initial screeing test (i.e test no.6). Test samples are subjected to discharges of 4.5 J, 0.45 J or 0.045 J energy.

Functional Specification & Deliverables

  • Electric Spark Tester: electrical control and ignition system mounted within 19" rack
  • Mains supply : 220 - 240 V a.c single phase power
  • Set of polythene strips and high voltage electrodes supplied as standard
  • Instruction manual
  • Top vent which can be connected to room extraction
  • Safety features: door interlock and electrode earthing
  • Newly designed enclosure, latched side access panel to aid cleaning

Optional Extras

  • Additional polythene strips
  • Additional high voltage electrodes

The following is available at an additional cost:

  • PC, LCD monitor and miscellaneous cables and accessories
  • Also available, the JCI 140 / JCI 148 Voltmeter combination and data card for spark monitoring (available for technical engineers and professionals)