Patent ID: 8686729

Claim:
A monitoring cell for performing a measurement in an NMR spectrometer of a reaction fluid produced by a reaction vessel, the monitoring cell comprising: a body having an inlet transport capillary for receiving the reaction fluid from the reaction vessel and an outlet transport capillary positioned coaxially around the inlet transport capillary for returning the reaction fluid to the reaction vessel, the body receiving cooling liquid from the reaction vessel and passing the cooling liquid around the inlet and outlet transport capillaries; a hollow sample probe having an outer shape and size that allows the sample probe to be inserted into the NMR spectrometer; a coupler section that removably connects the sample probe to the body so that the inlet transport capillary extends through the body into the interior of the sample probe and the outlet transport capillary is sealed to the sample probe to allow reaction fluid that enters the sample probe via the inlet transport capillary to exit the sample probe via the outlet transport capillary.