Sentence:  The invention relates to a <WSD>transflexion</WSD> probe for carrying out a <WSD>transflexion</WSD> measurement on a liquid located in a vessel, comprising a probe shaft which is provided with a light guide path in its interior and at whose front end there is arranged an open flow chamber with a reflective plate opposite the front end face of the probe shaft. 
Meaning of the word marked with <WSD> tags:  Type of spectroscopic measurement.