TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

A spark-plug type leak detector was located in the backup gas chamber to sense any extrusion of sodium from the seal. AN-fitting was installed in the body of the gas chamber to facilitate clean-up operations in the event of sodium leakage.  1, record 1, English, - spark%2Dplug%20type%20leak%20detector

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 CONT

Détection et localisation des fuites sodium. Les moyens de détection locale font appel à des dispositifs électriques qui exploitent la bonne conductibilité du sodium. Ils sont placés sur ou au voisinage immédiat des structures à surveiller avec une certaine distribution spatiale. Tous ces détecteurs sont constitués d'une électrode métallique isolée électriquement d'une autre partie métallique très proche, portée au potentiel de terre. [...] Suivant ce principe existent : - les détecteurs par bougies [...] sur les appareils, dans les bacs de rétention ou dans des gouttières placées sous les tuyauteries; - les détecteurs de type sandwich [...]  1, record 1, French, - d%C3%A9tecteur%20par%20bougies

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

A leak detector employing two similar gauge tubes in a bridge circuit with a trap which is selective for the tracer gas between the system and one of the tubes.  1, record 2, English, - differential%20leak%20detector

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A form of leak test in which the interior of an enclosure is actively evacuated while a tracer gas is applied to the exterior. The objective is to draw in some of the gas through possible leakage paths so that its presence becomes evident to a leak detector which will respond to the type of the type of gas used and which is connected in the evacuating system.  1, record 3, English, - dynamic%20leak%20test

Record 3,  Textual support,  French

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A leak detector output signal due to entrapped tracer gas in the vacuum system which cannot be quickly removed by pumping, a virtual leak of the tracer gas.  1, record 4, English, - background

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 CONT

Thermionic or Electron Impact Detector. In 1957, Ryce and Bryce described a sensitive ionization gauge based on the ionization potentials of vapors. It comprised a filament, a grid, and a plate. The potential difference between the filament and grid accelerated electrons which may ionize any gas in their path. If the grid potential is maintained at a level insufficient to ionize the helium carrier gas... no current flows in the plate circuit. If a potential difference of 18 V is maintained between the filament and the grid, compounds of lower ionization potential in the helium will be ionized and the positive ions produced will yield a cathode current, the current noted being a measure of the ion concentration. Into the modified ionizing chamber, operated at reduced pressure, a small fraction of the column effluent gas stream(less than 0. 5%) was allowed to flow into the gauge through a controlled leak. Over a 0. 02-l. 5 mm Hg pressure range, the sensitivity was approximately proportional to the pressure, and sensitivities in the range of 10[ minus superscript 12] mole were claimed.  1, record 5, English, - electron%20impact%20detector

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish