A helium analyzer is a tool that helps you find out if there is any helium gas in a substance. Imagine that you have a glass of water and you want to know if there are any tiny bubbles of air inside it. The helium analyzer is like a special straw that you stick into the water and it sucks up a tiny bit of the liquid. Then it tells you if there are any bubbles of helium gas in the water, which is a gas that you can't see or smell.
The helium analyzer uses a special technique called mass spectrometry to figure out if there is any helium gas in your sample. It works a bit like a star detector that looks up at the night sky and analyzes the light that comes from the stars to figure out what elements they're made of. Similarly, the helium analyzer looks at the gas molecules that were absorbed by its straw and breaks them up into tiny bits called ions. After that, it separates the ions based on their size and weight, and it creates a graph that shows how many ions of each size and weight are present.
If there is helium gas in the sample, the helium atoms will show up on the graph as a unique peak, separate from all the other gas molecules. The helium analyzer can then tell you how much helium is present and even identify which isotopes of helium are present, which is helpful for scientific research. So basically, a helium analyzer is a tool that helps you find hidden helium gas by sucking up a tiny bit of your substance and analyzing the gas molecules that come along with it.