A sensor system (100) or a sensing method minimizes the loss of aroma chemicals or other analytes in a sample gas while controlling the temperature and humidity of the sample gas. The system (100) may employ a humidifier (120) that adds water vapor to sample gas to provide a known water content, e.g., a saturated humidity at a known temperature. A sensing unit (130) may accurately measure the composition of the sample gas having a known water content, e.g., at a higher known temperature.

A method for extracting and detecting volatile organic compounds includes steps as follows. At least one effervescent tablet is provided, wherein the effervescent tablet is produced by mixing an acidic compound and an alkaline compound homogeneously. An extraction and detection apparatus is provided, wherein the extraction and detection apparatus includes an extraction chamber, an injection tube and a detection instrument. An extraction step is performed, wherein a liquid matrix is put into the extraction chamber, and the effervescent tablet is added into the liquid matrix to generate bubbles, the volatile organic compounds are extracted from the liquid matrix by the bubbles, and the bubbles enter into the headspace of the extraction chamber. A detection step is performed, wherein the volatile organic compounds extracted during the extraction step are transferred to the detection instrument via the injection tube so as to detect the volatile organic compounds.

A combustion analyzer system includes an analyzer unit, a primary analysis probe and one or more remote probes. The analyzer unit includes a condensation removal unit and two or more electrochemical sensors to detect at least oxygen and carbon monoxide. The analyzer unit also includes a means for sealing or isolating the electrochemical sensor inputs to prevent oxidation of the reactive elements when the unit is not in use.

A distillation probe includes a conduit having a central axis. In addition, the distillation probe includes a baffle assembly disposed in the conduit. The baffle assembly includes a plurality of axially-spaced baffles positioned one-above-the-other in a stack within the conduit. Further, the distillation probe includes a first helical cooling coil wrapped around the conduit. Moreover, the distillation probe includes a thermally conductive layer disposed about the conduit and encapsulating the first helical cooling coil. The thermally conductive layer is configured to transfer thermal energy between the first helical cooling coil and the conduit.

Devices, systems, and methods for determining gas characteristics to monitor transformer operation include extracting gas from transformer fluid for analysis.

Devices, systems, and methods for determining gas characteristics to monitor transformer operation include extracting gas from transformer fluid for analysis.

An off-gas conditioning system includes a source of off-gas, at least one testing port, in communication with the source of off-gas wherein the testing port is connected to a meter capable of testing at least one metric selected from the group consisting of temperature, pressure, flow rate, and humidity. A first vapor-liquid separator in communication with and downstream of the source of off-gas, a second vapor liquid separator in communication with and downstream of the first vapor liquid separator, wherein at least one of the first or second vapor-liquid separators includes a heat-exchanger for cooling the off-gas, and wherein at least one of said first or second vapor liquid separators includes a particulate filter for removing particulates from the off-gas. at least one testing port, downstream of the second vapor-liquid separator in communication with at least one analyzer for analyzing said off-gas for specific chemical compounds.

A system for on-stream sampling of pressurized process gas such as natural gas or the like, said system optimized for use with pressurized process gas having liquid entrained therein, or otherwise referenced as wet. In the preferred embodiment, a probe and method of sampling is contemplated to provide linear sample of fluids from a predetermined area of said fluid stream. Further taught is the method of preventing compositional disassociation of a gas sample having entrained liquid utilizing a probe having a passage formed to facilitate capillary action in fluid(s) passing therethrough. The present invention further contemplates the use of a screen or membrane provided exterior the probe tip body to block or lessen the likelihood of undesirable particulates or liquids from entering the probe.

Devices, systems, and methods for determining gas characteristics to monitor transformer operation include extracting gas from transformer fluid for analysis.

A microfluidic device includes a sample inlet for a fluid sample, a degassing chamber having a gas-permeable membrane and defining first and second portions separated by the gas permeable membrane, and a detection chamber. The sample inlet and the detection chamber are fluidly coupled to the first and second portions, respectively of the degassing chamber. The detection chamber is operably coupled to a light source and a detector. Assessing a concentration of chlorine gas in an aqueous sample includes providing an aqueous sample to a microfluidic device, separating gas from the aqueous sample in the microfluidic device, providing the gas to a detector, assessing the absorbance of the gas sample at a known absorption wavelength of chlorine, and based on the assessed absorbance of the gas sample at the known absorption wavelength of chlorine, assessing a concentration of chlorine gas in the aqueous sample.