Device for analyzing small-volume soil gas samples to determine concentration of carbon dioxide, has stamper for occupying internal diameter of probe such that dead volume is minimized compared to actual sample volume

摘要

The device has a suction pump (3) arranged adjacent to an integrated sensor head (11). A single probe (1) is designed as a pipe. A stamper (13) completely occupies internal diameter of the probe such that a dedicated gas passage is formed, so that a dead volume is minimized compared to an actual sample volume and does not exceed 5 mm. The stamper functions as an operating element of a bottom valve that is executed as a cone (10). The stamper is sealed by a piercing membrane (15). A non-dispersive infrared detector (2) detects a parameter of a gas e.g. carbon dioxide, oxygen and methane. The parameter of the gas is selected from a group consisting of pressure, temperature, moisture content and/or steam content.