Liquid sampling, metering and detecting device

Abstract

The invention discloses a liquid sampling, metering and detecting device which comprises a metering cylinder and a main piston rod arranged in the metering cylinder, a first cover body is arranged atthe top end of the main piston rod, an inner cylinder is coaxially arranged in the metering cylinder, and a groove is formed in the bottom of the piston rod in the axial direction. The upper portion of the inner cylinder is arranged in the groove, an auxiliary piston rod is arranged in the inner cylinder, the auxiliary piston rod sequentially penetrates through the inner cylinder, the main pistonrod and the first cover body, and the top end of the auxiliary piston rod is connected with a second cover body. The device is simple and practical in structure, the inner cylinder is additionally arranged in the metering cylinder, meanwhile, the main piston rod is matched with the auxiliary piston rod, the liquid taking range can be accurate to one digit after a decimal point, the first meteringguide rail and the second metering guide rail are matched, and high stability can be kept in the using process; due to the arrangement of the limiting block, errors existing in operation can be eliminated, the measuring precision cannot be affected by manual operation, and the accuracy of detection and analysis is improved.

Description

Technical field[0001]The invention relates to the field of measurement and detection, in particular to a liquid sampling measurement and detection device.Background technique[0002]In the detection and analysis of liquids, a metering device is often needed to quantitatively transfer the liquid. The accuracy of the metering device often directly determines the accuracy of the detection and analysis results. The existing instruments for quantitative sampling and removal of liquids Mainly traditional pipettes and pipettes. The accuracy of traditional pipettes will be significantly reduced after long-term use, and there are operational errors during use, which affect the accuracy of measurement and analysis. The structure of the pipette Complicated and costly, it is necessary to replace the pipette tip frequently to maintain accuracy. There is an urgent need for a measurement and detection device for liquid sampling with simple operation, high measurement accuracy, and simple and practic...

AI Technical Summary

Problems solved by technology

[0002] When performing liquid detection and analysis, a metering device is often required to quantitatively pipette the liquid. The accuracy of the metering device often directly determines the accuracy of the detection and analysis results. Existing instruments for quantitative sampling and pipetting of liquids Mainly traditional pipettes and pipette guns. The accuracy of traditional pipettes will be significantly reduced after long-term use, and there will be operational errors during use, which will affect the accuracy of measurement and analysis. The structure of pipettes Complex, high cost, need to change the measuring tip frequently to maintain accuracy

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