Field soil CO2 sampling and measuring device

Abstract

The invention discloses a field soil CO2 sampling and measuring device, and belongs to the technical field of CO2 monitoring. The device comprises a CO2 sampling device and a CO2 measuring device. The sampling device adopts a variable-diameter drill bit, a sealing cover and a piston driving structure, a closed gas sampling space is formed in a target soil layer, and pollution of ground air and non-target soil layer air is effectively prevented. The measuring device integrates a measuring chamber, a reagent storage chamber and a precipitation separation chamber which can be separated, the gas volume is adjusted through a movable partition plate so as to adapt to different concentration ranges, and CO2 absorption, precipitation preparation and system cleaning can be completed on site. The device disclosed by the invention realizes integrated operation of in-situ sampling of soil CO2, rapid concentration measurement and precipitation sample preparation, has the advantages of compact structure, good sealing performance, wide measurement range, convenience in sample preparation and the like, and remarkably improves the efficiency of field work and data reliability.

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