A device configured to be inserted in an NMR spectrometer for analysing a sample, the device comprising: a first conductive loop comprising a first straight portion; and a second conductive loop comprising a second straight portion; wherein each conductive loop (10, 20) is formed as a strip whose extremities coincide with each other to define an enclosure and wherein the first conductive loop and the second conductive loop are arranged such that: a first plane containing the first conductive loop is substantially parallel to a second plane containing the second conductive loop, wherein a space between the first plane and the second plane is a middle space; the first straight portion is substantially parallel to the second straight portion; a third plane containing the first straight portion and the second straight portion is substantially perpendicular to the first and second planes, wherein the third plane defines a first half-space and a second half-space and wherein the intersection between the third plane and the first plane defines a first direction; a projection of the second straight portion on the first direction overlaps at least partly with the first straight portion; the first conductive loop is located in the first half-space and the second conductive loop is located in the second half-space; the middle space is adapted to receive at least part of the sample at a position between the first straight portion and the second straight portion. a first conductive loop comprising a first straight portion; and a second conductive loop comprising a second straight portion; wherein each conductive loop (10, 20) is formed as a strip whose extremities coincide with each other to define an enclosure and wherein the first conductive loop and the second conductive loop are arranged such that: a first plane containing the first conductive loop is substantially parallel to a second plane containing the second conductive loop, wherein a space between the first plane and the second plane is a middle space; the first straight portion is substantially parallel to the second straight portion; a third plane containing the first straight portion and the second straight portion is substantially perpendicular to the first and second planes, wherein the third plane defines a first half-space and a second half-space and wherein the intersection between the third plane and the first plane defines a first direction; a projection of the second straight portion on the first direction overlaps at least partly with the first straight portion; the first conductive loop is located in the first half-space and the second conductive loop is located in the second half-space; the middle space is adapted to receive at least part of the sample at a position between the first straight portion and the second straight portion. a first plane containing the first conductive loop is substantially parallel to a second plane containing the second conductive loop, wherein a space between the first plane and the second plane is a middle space; the first straight portion is substantially parallel to the second straight portion; a third plane containing the first straight portion and the second straight portion is substantially perpendicular to the first and second planes, wherein the third plane defines a first half-space and a second half-space and wherein the intersection between the third plane and the first plane defines a first direction; a projection of the second straight portion on the first direction overlaps at least partly with the first straight portion; the first conductive loop is located in the first half-space and the second conductive loop is located in the second half-space; the middle space is adapted to receive at least part of the sample at a position between the first straight portion and the second straight portion.