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Pages for TM Electronics Leak Testers
Trace Gas Sensing as a Leak Test
Trace gas sensing is most effective as a leak
diagram illustrates a simplified trace gas leak
detector. The closed test part or package is pressurized
with a tracer gas, and the sensor is moved around
the part to determine if and where there is a
detectable leakage of the tracer gas. This method
gives quantitative measurements so specifications
can be established. It is straightforward and
reasonably easy to use, and the cost is low. Because
it is dependent on sensing a gas other than air,
gas sensing is not useful for sealed packages
that cannot be pressurized with a trace gas.
on a principle of thermal conductivity, the Gas
Check leak detectors detect all gases other than
air, but are particularly sensitive to Helium
and Hydrogen based gases.
The Gas Check line of trace gas detectors distributed
by TM Electronics is available in an intrinsically
safe model for working in areas that may contain
hazardous gases and for detecting flammable gases.