On Thu, Jun 23, 2011 at 10:36 AM, Finlay MacNab <finlaymac...@hotmail.com>wrote:
> There are several different part numbers listed in the sensor chart in the > pdf. > > A number of them are rated to 150C. > Again, I think you're reading that wrong. There is a table that gives the "application range" for RH and temperature measurement in two columns. The application range for temperature measurement is -40 to 150C. I don't think that means the RH can be measured over that range. Below the table, there is a section called "common characteristics" (meaning it applies to all of the probes in the table) and for the RH sensors, it gives the "sensor operating temperature" as -20 to 80C. > > also. > > It would appear that the measurement would benefit from a measurement of > pressure inside the reactor in order to confirm the steam is super heated. > Assuming it could be measured accurately enough, and the water is pure enough. I think the flat temperature curve is better evidence that the steam is not superheated. Look at any of the temperature graphs. As the temperature increases, the curve is not perfectly smooth. There are small fluctuations. But when the bp is reached, it is completely flat, as if there is some fundamental physical reason for it. That reason is the presence of liquid water. It would be much easier and much more convincing if a small reduction in the flow rate caused the steam to go substantially above boiling by 10 or more degrees. But in all the experiments, the steam temperature is always flat, and within a degree or so of 100C.
