Vortex flowmeter and associated fiber duct

In a vortex flowmeter of the type having a medium chamber through which a medium is at least partially flowable and which is defined by a device wall, at least one bluff body provided in the medium chamber and at least one pressure sensor provided in an effective range of the bluff body for metrologically detecting the pressure in the medium in an area next to the pressure sensor, and at least one optical fiber arranged for measuring deflection of the pressure sensor and being guided from the medium chamber through a fiber channel in the device wall into medium-free surroundings, the improvement comprising:

• a first sealing element extending into the fiber channel and having a contact surface for contacting the optical fiber at a first side thereof,
• at least a second sealing element having a contact surface for contacting the optical fiber at a second side thereof, the second sealing element being guided in a guide formed in the device wall, and
• a positioning means adapted for pressing the second sealing element against the contact surface of the first sealing element with the optical fiber located therebetween in such a manner that the contact surface of the first sealing element and the contact surface of the second sealing element enclose the optical fiber and close the fiber channel in a sealed state thereof.