Apparatus for measuring quantity of asphalt ingredient in an asphalt compound
Method and apparatus for measurement of moisture
Apparatus and method for determining the hydrogen content of a substance Patent #: 4499380
ApplicationNo. 175144 filed on 03/30/1988
US Classes:250/390.04, Composition analysis16/257, Resiliently biased retaining means250/390.05For moisture content
ExaminersPrimary: Howell, Daniel W.
Assistant: Rauchholz, William F.
Attorney, Agent or Firm
International ClassG01N 023/05
AbstractThe present invention relates to an improvement in a nuclear measuring gauge for measuring the composition of a hydrogen containing material by counting neutrons which are thermalized by the presence of the hydrogen in the material. The present invention is based upon the recognition that in measuring samples, such as hot asphalt, with such a gauge, the error which is introduced by temperature variations in a sample is a function of not only the temperature of the sample but also its hydrogen content. In accordance with the present invention, this inaccuracy is compensated for by applying to the measurement a correction factor which is a function of both the temperature of the sample and its hydrogen content.
Field of SearchPlural detectors