In various embodiments, the invention is a versatile, automated system to allow researchers to continuously measure gas flux rates from multiple chambers over time without (or with reduced) need for personnel in the field. The invention is compatible with any high-frequency analyzer or vial filler and most chamber designs.

A gas monitoring and control system including a gas sampling chamber, sampling inlet and outlet valves, a pump and a controller. Sensors are disposed within the interior chamber that sense characteristics of a gas from a gas source and generate representative signals. The sampling inlet and outlet valves i) allow the gas into the gas sampling chamber while operating in a gas sampling state, and ii) allow ambient air into the gas sampling chamber while operating in a purge state. The pump i) causes the gas to flow through the gas sampling chamber while operating in the gas sampling state or ii) causes ambient air to flow through the gas sampling chamber while operating in the purge state. The controller causes the sampling inlet and outlet valves, and the pump to alternate operating in the gas sampling or purge state to selectively expose the sensors to the gas.

An apparatus for sampling landfill gas from a landfill flowing through a pipe. The apparatus may comprise: an enclosure configured to receive a section of the pipe; a gas sampling port in the section of the pipe; at least one sensor device disposed in a region of the enclosure, the at least one sensor being coupled to the section of the pipe through the gas sampling port; and thermal insulation positioned to retain heat from the section of the pipe in the region of the enclosure. A method of operating a landfill gas recovery system. The method may comprise: flowing gas from a well riser pipe through a sampling subsystem to a collection system; and heating a portion of the sampling subsystem with the gas flowing from the well riser pipe to the collection system.

A cooling-assisted inside needle capillary adsorption trap device for sampling and delivering volatile and semi-volatile analytes to an analytical device is disclosed. The device includes an inside needle capillary adsorption trap having a first end and a second end and a side aperture located between the first and second ends. The side aperture enables entering the carrier gas into the INCAT and flowing upon the surface of the sorbent (when injected into the GC injector) for complete releasing and eluting of the analytes from the interior surface of the needle. A sorbent is multiwall carbon nanotube/polyaniline and is coated onto the interior surface of the needle between the second end and the side aperture to entrap an analyte within a sample. The cooling-assisted inside needle capillary adsorption trap device also includes a cooling device configured to cool the sorbent.

A system for detecting a concentration of free SiO.sub.2 in coal dust includes a first sampling tube and a second sampling tube for sampling the coal dust, a three-way control valve communicated with the first sampling tube and the second sampling tube respectively, a photoacoustic spectrometry detection device communicated with the three-way control valve through a connecting pipeline, and a SiO.sub.2 reaction tube for reacting SiO.sub.2 in the coal dust; and the SiO.sub.2 reaction tube is disposed on the second sampling tube. In the present disclosure, a coal dust sampling line is convenient to change by disposing the three-way control valve, and the first sampling tube and the second sampling tube are respectively communicated with the photoacoustic spectrometry detection device, so as to perform a differential accurate detection of the reacted CO content, and to obtain the SiO.sub.2 content.

A compact rock pyrolytic analysis and evaluation instrument comprises a sample introduction system, a pyrolytic furnace, a bypass system, a total hydrocarbon amount and methane content analysis system, a signal acquisition control system and a computer. The pyrolytic furnace is respectively connected with the sample introduction system and the bypass system, the total hydrocarbon amount and methane content analysis system is connected with the bypass system, the signal acquisition control system is used for controlling and connecting the total hydrocarbon amount and methane content analysis system, and meanwhile, the signal acquisition control system is communicated with the computer. The disclosure simultaneously detects the total amount of hydrocarbons produced by rock pyrolysis and the content of methane gas produced by rock pyrolysis, and the obtained data are reliable.

A system for analyzing a volatile component in extraterrestrial soil through penetration heating induction includes the following: a penetration heater, provided therein with a volatile component measurement and analysis module configured to analyze a volatile component in a detected medium; a gas capture hole, provided on a side wall of the penetration heater and used to divert the volatile component in the detected medium to the volatile component measurement and analysis module; a temperature acquisition module, disposed on the penetration heater and configured to acquire a temperature of the detected medium; and a heating module, disposed on the penetration heater and configured to acquire the temperature of the detected medium. The system has a compact structure, a simple function, and low engineering costs, and can directly detect and analyze a volatile component in deep extraterrestrial soil.

A gas monitoring and control system including a gas sampling chamber, sampling inlet and outlet valves, a pump and a controller. Sensors are disposed within the interior chamber that sense characteristics of a gas from a gas source and generate representative signals. The sampling inlet and outlet valves i) allow the gas into the gas sampling chamber while operating in a gas sampling state, and ii) allow ambient air into the gas sampling chamber while operating in a purge state. The pump i) causes the gas to flow through the gas sampling chamber while operating in the gas sampling state or ii) causes ambient air to flow through the gas sampling chamber while operating in the purge state. The controller causes the sampling inlet and outlet valves, and the pump to alternate operating in the gas sampling or purge state to selectively expose the sensors to the gas.

A control system for controlling extraction of landfill gas from a landfill via a gas extraction system comprising well piping, the landfill gas having a first temperature when extracted, the control system comprising: a gas composition chamber coupled to the well piping and comprising at least one sensor configured to measure one or more characteristics of a landfill gas sample in the gas composition chamber; a temperature control mechanism configured to heat the landfill gas sample in the gas composition chamber to a second temperature at least a threshold amount greater than the first temperature; and a controller configured to control the at least one sensor to measure the one or more characteristics of the landfill gas sample in the gas composition chamber when a temperature of the landfill gas sample in the gas composition chamber is at least the threshold amount greater than the first temperature.

Provided are installation devices and uses thereof for receiving and installing an adaptor body for sampling soil gas under a slab. The installation device includes a cylindrical body and an internal cavity. The cylindrical body has a length greater than a thickness of the slab, a first end configured to be placed adjacent a top of the slab, and a second end configured to be placed below a bottom of the slab. The internal cavity extends longitudinally through the cylindrical body from the first end to the second end, where the internal cavity has a first portion and a second portion. The first portion has a first diameter located at the first end of the cylindrical body and the second portion has a second diameter that is less than the first diameter. The internal cavity of the cylindrical body is configured to receive the adaptor body.