Sealing device and method for detecting a possible gas leak at a fitting connection for biopharmaceutical product

A sealing arrangement for use in detecting a detectable gas in a hermetically sealed detection chamber, the sealing arrangement comprising:

• a housing unit provided with a first housing part, a second housing part and an access passageway, the first housing part and the second housing part delimiting an inner volume of the housing unit in a closed state, the inner volume being accessible via the access passageway;
• a connecting device, which comprises a tubular part extending from a first annular part to a second annular part, the tubular part delimiting a fluid passage and having an intermediate portion of annular shape arranged around the fluid passage, between the first annular part and the second annular part;
• and
• a sealing structure adapted to form a gas-tight junction at the access passageway, by a continuous contact around the intermediate portion, when the second annular part is received in the inner volume in the closed state of the housing unit;
• wherein the first annular part is configured to be overlapped by a flexible hose end, while the second annular part is provided with an attachment component, and wherein the housing unit is configured to receive the attachment component in the inner volume, so that gas escaping from the fluid passage via at least one gas permeable end included in the attachment component is hermetically kept in the inner volume.