Hello,
Perhaps this link provides some usefull information about relative humidity RH and temperature above 100 deg C. http://www.macinstruments.com/relatv_c.htm Peter v Noorden ----- Original Message ----- From: Jed Rothwell To: [email protected] Sent: Tuesday, June 21, 2011 5:24 AM Subject: Re: Re: [Vo]:Something more on the steam Abd ul-Rahman Lomax <[email protected]> wrote: The Testo 650 is used for measuring *humidity*, Jed, for, like, food manufacturing and storage, etc. Read that HP literature. The device measures up to 100% humidity, it claims. Wet steam is above 100% humidity. The literature claims that the device measures: CO2, CO, temperature, and relative humidity. Other parameters are calculated from these measurements. http://www.testo.com/online/embedded/Sites/INT/SharedDocuments/ProductBrochures/0563_6501_en_01.pdf It isn't HP; it is testo. The meter also measures "absolute humidity g/m^3" (mass) and enthalpy (kcal/kg), which is what we want to measure. I guess enthalpy is derived from absolute humidity and temperature. Elsewhere you wrote: You misunderstood that, I believe. Look at what the thing actually measures, and look at the humidity measurement operating range. "85% (max), no condensation." This thing doesn't work in the presence of liquid water, as I read it. There would be no point to making a meter like this if it did not work in the presence of liquid water, because there is almost always some liquid water in process steam. It is never purely dry. I think people here should concede that Galantini is expert enough to select the right kind of meter after all, and it is likely he also knows how to use the meter to measure by mass instead of volume. - Jed
