Bruker NMR - Principle of NMR Thermometer

Principle of NMR Thermometer
Z33085_2_002 7
Principle of NMR Thermometer
The NMR Thermometer measures the temperature inside the sample by observing the
chemical shifts of two
2
H signals using the lock channel (LTRX board) of the NMR system.
The distance between the two signals is transferred into a temperature and directly used by
the temperature control unit (BVT) for regulation. Thus, the NMR Thermometer acts as a
temperature sensor (see figure below).
To obtain the second lock signal, a thermometer substance needs to be added. One of the
signals should also be temperature dependent.
Figure 2.1: Principle of the NMR Thermometer.
2