Patent ID: 9726735
Date: 2017-08-08
CPC Classifications: G01R

Claim:
1. An NMR probe head for analyzing a substance to be measured, the substance being disposed in a longitudinal sample vial closed at one end and filled with that substance, the probe head comprising: an NMR coil system disposed around a vertical z axis, the NMR coil system being fixed radially, with respect to the z axis, relative to the NMR probe head; a first centering device for radially centering the sample vial relative to the z axis, said first centering device having a first passage opening for the sample vial that centers the sample vial in a radial direction only, wherein, in a z direction, said first centering device is disposed above said NMR coil system and is radially fixed with respect to the z axis; and at least one second centering device, said second centering device having a second passage opening for the sample vial that centers the sample vial in the radial direction only, said second centering device being disposed axially above the NMR coil system and spaced apart from said first centering device in an axial direction of the z axis by an axial spacing with respect to the z axis, said axial spacing being selected and sizes as well as geometric shapes of said first and said second passage openings being designed such that, during an entire duration of transport of the sample vial into a measuring position in the NMR probe head, said first centering device and said second centering device cooperate with the sample vial to restrict a radial scope for movement of the sample vial relative to the z axis to such an extent that the sample vial cannot touch a predefined hollow cylindrical space, which extends axially with respect to the z axis in a region of said NMR coil system, which extends above and/or below said NMR coil system and which at least partially extends radially within said NMR coil system, wherein said second centering device is mechanically connected to the NMR Probe head and a radially innermost NMR coil of said NMR coil system and/or a holder structure for said innermost NMR coil is/are disposed in said hollow cylindrical space, wherein said holder structure for said innermost NMR coil is disposed in said hollow cylindrical space, and at least part of said first centering device extends radially between said holder structure and the sample vial in a measuring position thereof.