NDT - Helium Leak Testing - Level 2

MS412  - 80 hours

The program for this course is validated by COFREND according to standard ISO 9712: 2012.

Learning objectives

Mastery of leak testing techniques
Drafting of instructions in compliance with specifications.
Interpretation of control results and decision.


Who will benefit most ?

Level maintenance technicians and vacuum users.
It’s mandatory to follow the course MS413 – Leak testing method 2 – Practice for being allowed to take the examination



Basic knowledge of the behavior of gases and an understanding of vacuum systems.
Possibility to refresh the required basics in mathematics and physics by e-learning.


Innovative teaching resources

Lectures and «hands-on» exercises.
Custom training manual.
Prior interview with the trainees possible in order to quantify their needs.
Training centers integrated with 40-30 workshops.
Theory assessment and practical tests to measure individual proficiency by the end of the training period.
Maximum 6 persons per group.


Price per person

Please, contact us.


Dates & location

Training Department : +33(0)4 76 84 40 30

For other dates or other locations, contact us.

Can be also held in your premises for a specific training


In charge of the training session

Michel THIAM : PhD in Physics (Strong Experience in Surface Physics and Surface Chemistry under UHV Conditions), from 40-30 Engineering Department; certified COFREND NDT Using level 2.



1. Physics
- pressure
- flow rates
- conductance
- mean free path

2. Technology
- pumps
- manometers
- mass spectrometers
- platinum diode
- electron capture detector

3. Methodology
- bubble test
- pressure change test
- acoustic ultrasonic leak testing
- halogen: Forane, SF6, R134A
- ammonia leak testing
- vacuum helium checking, sniffing, global helium testing


1. Helium method
- global
- spray
- sniffing
- bombing

2. Hydrogen method
- direct sniffing and sniffing with accumulation

3. Ammonia method

4. Bubble method
- under vacuum
- under pressure

5. Pressure variation method
- under vacuum
- under pressure


- Collecting results and writing reports
- Drafting operating procedures
- MCQ test