Direct-reading density pipe

Abstract

The invention discloses a direct-reading density pipe. The direct-reading density pipe comprises a transparent sample detection pipe, a top cover plate and a volume replacement device, wherein the sample detection pipe has scales and is used for holding a medium; the top cover plate is arranged at the top of the sample detection pipe in a sealing manner and is used for ensuring the internal pressure condition in the sample detection pipe; the volume replacement device has scales, is communicated with the sample detection pipe and is used for pumping out the medium in the sample detection pipe;a transparent capillary tube which is inserted into the sample detection pipe and is used for enabling the pressure inside and outside the sample detection pipe to be consistent when the medium in the sample detection pipe is discharged is penetrated in the middle part of the top cover; and a zero graduation line convenient for zero setting and reading scale lines convenient for reading are arranged on the transparent capillary tube. The direct-reading density pipe is high in measurement precision, is capable of accurately measuring the volumes of samples with relatively small volumes, is notinfluenced by the measurement environment, and is capable of realizing the aim of measurement convenience.

Description

technical field [0001] The invention relates to the technical field of volume measuring devices, in particular to a direct-reading density tube. Background technique [0002] When measuring the volume of irregular solid samples in the laboratory, graduated cylinders, Lee's bottles, volumetric flasks, measuring cups, pipette scales, etc. are often used. Usually, the drainage method is used for measurement, that is, the container is filled with a sufficient amount of liquid, the irregular solid sample is completely immersed in the liquid, and the volume of the rising part of the liquid surface is measured, which is equal to the volume of the irregular solid sample. [0003] However, the measurement accuracy of these measuring equipment is low, and it is greatly affected by the volume expansion coefficient of the medium, light, temperature, medium type, operation method, etc. If the accuracy is slightly improved, the operation of the equipment is complicated, and the environmen...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to provide a direct-reading density tube to solve the problems of low measurement accuracy of existing equipment for measuring samples, harsh environmental conditions and inability to measure small solids. In order to achieve accurate measurement of small sample volume, it is not affected by the measurement environment, improves measurement accuracy, and achieves the purpose of measurement convenience

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