There are so many brands you can find in the market for the dew point analyzer. This is one of them that we have had experience to utilize in a project.
The dew point temperature sensor will show you the dew point temperature of the fluid but not the flowing temperature, so that dont miss understanding of it.
The model in the videos below is one which has 3 wires, 2 wire for the power and the another is the signal, it could be relay or 4-20 mA. The signal is active so that you need to ensure your system if you plan to logging the signal for the need of signal splitter.