| 摘要 |
<p>PURPOSE:To decrease the transmission quantity of radiation heat and to measure exactly the flow rate of gas by controlling the quantity of electricity to be applied to each heating element in such a manner that the temp. of an outside radiation shielding body is made equal to the temp. of an inside heating element probe. CONSTITUTION:A heater 11 and the 1st temp. measuring sensor 12 are contained in the heating element probe 1. The outside radiation shielding body 2 is so installed as to provide the double construction to enclose partially the probe 1. The heater 21 and the 2nd temp. measuring sensor 22 are contained therein. The electric energy to be applied to each heating element is so controlled by using a controller 3 that the temp. T2 of the body 2 is made equal to the temp. T1 of the probe 1. The transmission quantity of radiation heat is decreased by the above-mentioned method. The exact measurement of the flow rate of the gas to be measured is made possible even if the temp. of said gas is as high as >=400 deg.C.</p> |
