NCT Control Expertise


Quantitative measurements and location of leak


  • Leak controls for hostile environment confinement vessels (patented method)
  • Bubble method
  • Pressure variation method
  • Halogen tracer gas method (ionisation)
  • Ammonia tracer gas method (physico-chemical reaction)
  • Helium tracer gas method (mass spectrometry)
  • Acoustic method (measurement of noise of different frequencies)
  • P.G.T. (Pressurised Gas Test) and suction cup


  • Leakage control supervision
  • Drafting of control procedures and technical notes
  • Design and installation of automatic processes
  • Gas tracing for ventilation ducts or pipes to check their efficiency
  • Efficiency analysis of medical sterilisers
  • Gas transfer analysis: ventilation of industrial premises
  • Studies and drafting of technical documents on vacuum techniques
  • Feasibility studies on leak testing and developping the corresponding equipment


Checking and ensuring that a manufacturer and/or supplier of a certain material fulfils or has fulfilled the requirements of an order

  • Verifying that the client approves for studies related to a case
  • Verifying and approving all implementation and control documents
  • Follow-up of schedule
  • Follow-up of manufacturing operations and control in the workshop and on site
  • Detection of non-conformities
  • Receipt of materials
  • Follow-up of tests and acceptance of installations on site
  • Verification and approval of the Manufacturer’s file


Checking for superficial defects on products, using white, ultraviolet or fluorescent light techniques.

Penetrant testing is reserved for controlling non-porous materials that are not too rough, hence the importance of the surface condition.

  • Wear defects (cracks, etc.)
  • Processing defects (porosity, etc.)