probe gas

probe gas

[′prōb ‚gas]
(engineering)
Tracer gas emitted from a small orifice for impingement on a restricted area being tested for leaks.
References in periodicals archive ?
This allows us to probe gas in foreground galaxies.
When Intentional or Accidental Reasons Drain Pressure Control Valve No Longer Closes and Debits Probe Gas.
Their varying response to different gas species makes them into practical leak detectors since a probe gas other than air, such as helium, will produce a sudden and large reading difference.
Re ``Senator Boxer: Probe gas spike'' (Business, March 7):
Following Production Samples Confirmed A Probe Gas Reserves.
This attribute has helped give rise to a particular piece of technological folklore that helium (He) is used as a probe gas for leak detection because it is a small molecule and more able to pass through a leak.
Through This Work Will Be Binding Probe Gas National Transmission System.
Leak detectors can detect leaks only if helium probe gas is allowed to enter the sensing head.