Why Helium?

Helium Based Testing Methods

In simple terms, Helium technology is the act of finding leaks in some type of enclosed or sealed system using helium as a “tracer” gas, and measuring its concentration as it escapes due to leakage. A package system such as a vial, consisting of a container and elastomeric closure, is a good example. A helium-filled vial is subjected to vacuum, and the amount of helium escaping that package is quantitatively measured and reported as a leak rate. Other examples include a prefilled syringe, a foil pouch or a cold form blister card. Each of these package types is designed and intended to keep the drug product contained while keeping out any detrimental environmental contaminants, such as debris, microorganisms, or even gases. Helium leak detection has the sensitivity to evaluate each of them.

Helium Gas Key Attributes that Make it Ideal for Package Leak Testing:

  • Quantitative helium leak rate data not only provides pass/fail package seal quality and container closure integrity but allows for direct comparison across various packaging materials/forms, production line settings, and stability storage conditions.
  • Helium gas is one of the smallest atoms, allowing it to breach leak pathways reliably, easily, and quickly. Helium is a non-flammable, inert, odorless gas making it ideal for leak detection.
  • Most leak test cycles are less than 1 minute – 100% helium flow methods can be as short as 30 seconds.
  • Low levels of ambient helium (5 – 20ppm) ensure high signal to noise ratios thus highly accurate leak rate data.
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