Patent ID: 8591812

Claim:
A piezoelectric sensor arrangement for analysis of at least one liquid sample, comprising: a signal source; a measuring device; and a docking system comprising a first part and a second part, wherein said first part comprises means for receiving a sensor element which sensor element comprises a piezoelectric quartz crystal having a freely accessible electrode and which electrode is positioned to contact the liquid sample when in use, said means for receiving comprising an opening allowing said sensor element to contact a flow cell element when in use; said second part comprises liquid sample channels to conduct the sample and a flow cell element; said flow cell element comprises an abutting part provided with an outwardly open recess surrounded by an abutting surface, inlet liquid sample channels, and outlet liquid sample channels; said inlet fluid channels and said outlet liquid sample channels are configured to lead the liquid sample through said recess; said abutting surface and a portion of said abutting part closest to said abutting surface are made of an elastic material; said elastic material is capable of forming a seal against the surface of the piezoelectric quartz crystal; said first and second part are movable in relation to each other between a closed position and an open position; when said first and second parts are moved from said open position to said closed position an upper surface of said abutting part of said flow cell element comes into abutment with said piezoelectric quartz crystal; and when said first and second parts are in said closed position a seal forms between said piezoelectric quartz crystal and said recess of said flow cell element to create a flow cell.