Freezing point meter and freezing point measuring method

摘要

Problem to be solved: to provide a new deposition point measuring method for quickly and accurately measuring the cloud point. When the total reflection critical angle of the precipitate such as paraffin precipitated at the time of cooling is cooled to. Theta. 2 while the test liquid such as light oil is gradually cooled, the incident light is irradiated at the incident angle. Theta. Which meets. Theta. . Theta. 2, and the total reflection light from the test liquid is examined for each temperature. Leave. The deposition point of the test liquid is determined from the change of the total reflection light intensity to the temperature change. The light intensity distribution detected by the sensor array at each temperature is statistically processed to determine the deposition point more accurately. A total reflection type sensor having an incident path and an outgoing path can be used.