TWM 42 N

Electromagnetic Yoke

Our TWM yokes are the perfect mobile crack detection units, particularly for checking ferromagnetic parts where burn marks and annealing must not occur. These durable AC electromagnetic yokes are designed to detect surface indications.

The TWM 42 N operates at 42 V supplied from a separate transformer which is connected to a 230 V AC supply. This satisfies the VDE safety regulations, which means that the TWM 42 N can be used for testing inside vessels, tubes and closed containers.


  • Lightweight ergonomic design.
  • Durable rugged construction.
  • Oil and abrasion resistant.

Ordering Information

TWM 42 N072301

Product Properties

NDT TypeMagnetic Particle Testing


Ideal ApplicationField testing, In-service inspections, Spot inspections, Testing inside vessels, tubes and closed containers, Weld inspection

Defect ExamplesFatigue cracks, Grinding cracks, Quenching cracks, Seams, Shrink cracks, Tears


StandardsDIN EN ISO 9934-3:2002, DIN VDE 0100-410:2007, DIN VDE 0100-540:2012, EN 60204-1:2006

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