Pressure sensor with flame arrester

G - Physics – 01 – L

Patent

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Details

G01L 19/06 (2006.01)

Patent

CA 2521076

The invention relates to a pressure sensor (1), comprising a pressure monitoring cell (18) and a base body (10), through which a pressure channel (11) with a flame arrestor runs, by means of which the pressure measuring cell (18) may be pressurised with the process pressure using a transfer medium. The pressure channel has a first section (13) and a second section (12), with the flame arrestor arranged in the first section (13) and the second section (12) comprises a drilling in which a filler body (16) is arranged. The gap between the drilling and the filler body is produced with a large tolerance such as not to fulfil the requirements of a flame arrestor. The flame arrestor in the first section (13) is produced, for example, whereby the first section comprises a drilling in which a filler pin (14) is arranged and the remaining gap between the drilling and the filler pin satisfies the requirements of a flame arrestor.

L'invention concerne un capteur de pression (1) comprenant une cellule de mesure de pression (18) et un corps de base (10) à travers lequel s'étend un canal de pression (11) pourvu d'un dispositif antiretour de flamme, canal par lequel la cellule de mesure de pression (18) peut être soumise à la pression de processus au moyen d'un milieu de transmission. Le canal de pression comprend une première section (13) et une deuxième section (12), le dispositif antiretour de flamme étant placé dans la première section (13) et la deuxième section (12) présentant un alésage dans lequel un corps de remplissage (16) est placé. L'espace entre l'alésage et le corps de remplissage est ménagé avec une tolérance supérieure, de sorte que cet espace ne remplit pas les exigences d'un dispositif antiretour de flamme. Ce dispositif antiretour de flamme est réalisé par exemple dans la première section (13) par le fait que cette première section présente un alésage dans lequel une tige de remplissage (14) est placée, l'espace restant entre l'alésage et la tige de remplissage satisfaisant aux exigences d'un dispositif antiretour de flamme.

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