Abstract: An electronic weighing machine for a moisture meter not only measures the amount of moisture in the test sample, but also measures the mass of the test sample itself. In addition, the present invention is related to a heat drying type moisture meter, a filter for the moisture meter and a moisture adsorption unit for the moisture meter. The electronic weighing machine for the moisture meter is used with the moisture meter which is equipped with a heating section for introducing the carrier gas into it and heating the test sample, a moisture adsorption section for adsorbing the vaporized moisture from the carrier gas flowing out of the heating section, and an electronic weighing section for determining the increase in mass of the moisture adsorption section. The electronic weighing section has a test sample weighing section and a section for measuring the mass of the collected vaporized moisture in the weighing arm of the electronic weighing unit.

Abstract: A heating unit vaporizes a sample placed in a container having an opening that is hermetically sealed with a rubber gasket and discharges the vaporized constituents to the outside of the container together with a carrier gas. A sample 16, such as an easy-to-vaporize liquid, is placed in a container 1 whose opening 1a is hermetically sealed with a rubber gasket 2a. The container 1 is loaded into a heating tube 8 to extract the vaporizable constituents. The heating tube 8 is equipped with carrier gas introduction tubes 12 having needles 4 with through-holes, a vaporized constituent and carrier gas discharge tube 13 having a needle 5 with a through-hole, and a heater 11. These needles 4 and 5 are arranged to pierce the rubber gasket 2a of the container 1 placed in the heating tube 8.

Abstract: In a method and apparatus for discriminating a coal species, discriminating values of coal species/properties are prepared corresponding to coal ranks, a coal to be discriminated is irradiated with near-infrared rays having different wavelengths, and light of near-infrared rays reflected from the coal is received; Aborbances of the coal are acquired, and the coal species/property discriminating value of the coal is discriminated on the basis of the absorbances and a prescribed calibration curve.

Abstract: An instrument for measuring a thickness of a surface processing film on a metal includes a plurality of instruction executing keys, an enclosed recording apparatus, a terminal for connecting a probe to detect an electrical signal corresponding to the film thickness when the probe is pressed onto the metal, a circuit for converting the electrical signal obtained from the probe to a digital value indicative of the film thickness, and a circuit for arithmetically processing the digital value in accordance with instructions by the instruction executing keys. The results of the processing are outputted to the recording apparatus.

Abstract: A voltage signal associated with the moisture content of a sample in grain or sand form is converted into a digital signal value by an analog-to-digital converter. A programmable read-only memory capable of erasure and field rewriting has stored therein conditions for computation and calibration parameters associated with various types of the sample. Upon designation of one of the types, the conditions for computation for the designated type of sample are picked up, and a moisture content is computed and digitally indicated by use of the computation parameters for the designated sample type. This moisture content value can be compensated for temperature, and the conditions for computation and the calibration parameters in EPROM are capable of being erased or rewritten.

Abstract: A wide range electric resistance type moisture meter is disclosed wherein a current flowing through a sample such as grain or wood is scaled by a load resistor and a feedback resistor of an operational amplifier to derive a scaled current which is proportional to the sample current, and the scaled current is current-voltage logarithmic-converted by a logarithmic conversion circuit including another operational amplifier connected to the output of the first-mentioned operational amplifier and diodes, so that a moisture content indicating voltage is linearized even in a high moisture content range. The output of the logarithmic conversion circuit is processed by an operation circuit to produce the moisture content and temperature compensated and the resulting moisture content is indicated by a moisture content indicator.

Abstract: Disclosed is a self-propelled pipe inspection apparatus suitable for use in inspecting a plurality of parallel and vertical pipes one by one, for the presence of faults such as cracking, corrosion and so on, by non-destructive testing method. The apparatus has fault detecting means which may be of conventional type, pipe cramping means adapted to cramp the pipe and a mobile carrier by which the fault detecting means and the pipe cramping means are carried. The mobile carriage has a power-driven running surface which may be a running surface of an endless belt and adapted to be pressed onto the pipe surface when the pipe is cramped by the cramping means. The cramping means comprise at least a pair of arms each of which having a bent end carrying a roller. Each arm is supported for free rotation around its longitudinal axis, so that the roller may be swung outwardly to clear the pipe, when the latter is brought into the space between the pair or arms.

Abstract: Apparatus for electrically measuring the water content of a specimen such as grain the electric resistivity of which has a correlation with the water content, comprising a linearizer for converting the measured electric resistivity in the low water content region in which the electric resistivity of a grain specimen changes non-linearly with the water content into an electric quantity linearly changing with the water content, and a temperature compensator including a temperature sensitive element for generating a linearly changing electric signal with temperature, the temperature compensator generating a temperature-compensating electric signal from said linearly changing temperature signal, the temperature compensation of the measured value being commonly done with said temperature compensator in both the low and the high water content ranges by adding a linearly changing electric quantity corresponding to the measured water content and the compensating electric signal.