Provided in one embodiment of the present invention is an inhibitor removal system for sensor detection, comprising: a housing in which odorous gas flows in a pipe; a gas inlet part providing a passage through which the odorous gas flows into the housing; a pre-treatment part for removing odor detection inhibitors from the odorous gas flowing in the housing; a gas discharge part providing a passage through which the odorous gas is discharged from the housing; and a control unit for controlling the operation of a pre-treatment system in the pre-treatment part, wherein the pre-treatment part comprises a first pre-treatment part having a filtering device for filtering and separating out the odor detection inhibitors from the odorous gas; and/or a second pre-treatment part having an electrical dust collection device for collecting and separating out the odor detection inhibitors from the odorous gas.

Breath sensor apparatus and methods of use are described herein where a flow control apparatus may generally comprise a sampling chamber defining a volume and one or more openings into the sampling chamber, at least one sensor in fluid communication with the sampling chamber, wherein the at least one sensor is configured to detect the analyte. The sampling chamber may also be configured to receive the breath sample into the sampling chamber and into contact with the at least one sensor via diffusion into the sampling chamber.

The invention relates to a device (1) for detecting an analyte in a gas mixture or a liquid, comprising: (a) a polymer sorption filter (2) configured to separate methanol from ethanol; and/or to separate hydrogen and/or methane from interferants; and (b) means configured to detect (4) at least one of methanol, ethanol, hydrogen and methane. Furthermore, described is a method for detecting an analyte using the device and the use of the device.

There is provided a system (1) including a monitoring unit (50) that analyzes, using a sensor (51), components of a first gas which may include first components and a pre-separation unit (30) disposed upstream of the monitoring unit. The pre-separation unit includes: a first supply line (31) that supplies the first gas (35) to the monitoring unit; a second supply line (32) that supplies a second gas (36), which includes components obtained by removing the first components from the first gas using a first separator (40), to the monitoring unit; and an automatic valve station (38) that periodically switches between the first supply line and the second supply line to alternately supply the first gas and the second gas to the monitoring unit.

A small-sized, portable enclosure protects a gas sensor against degradation due to environmental exposure and changes in atmospheric conditions. The protective enclosure includes an inlet for introduction of a gas into the enclosure, an outlet for release of the gas upon completion of a sensing run, and a number of in-line filters that remove from the inflowing gas sample analytes, contaminants, and other materials that can compromise the integrity of the sensor or cause the sensor to degrade over time. The enclosure does not include any filters during the measurement phase of the sensing run in order to allow the gas sensor to accurately measure an unmodified gas mixture and/or analyte.

An evaporation closed chamber for detecting hazardous substance, having a closed chamber, an orifice plate, a pressure plate, a drive device and an elastic film, the orifice plate is mounted on any surface(s) of the closed chamber, the elastic film is arranged on the outer side of the orifice plate, the pressure plate is arranged on the outer side of the elastic film, and the drive device is in transmission connection with the pressure plate to drive the pressure plate to move forwards and backwards to press the elastic film against the orifice plate. The elastic film expands with the increase of internal temperature of the closed chamber and shrinks with the temperature decrease of the closed chamber such that the gas in the closed chamber can be timely compensated; the orifice plate prevents hazardous substance from leaving on the gas compensation device to influence test accuracy.

A level measuring and gas detection system arranged to measure a level and to detect a gas and/or an odor, with computing circuitry, arranged to generate a message when the level sensor detects a preset level limit value and/or when the gas sensor detects a preset gas concentration limit value.

The invention provides a gas detection system and a method with eliminating influence of ambient temperature and humidity change, the gas detection system comprises a bare sensor, a reference sensor and a calculation module; the bare sensor is used to detect a target gas in an ambient gas to obtain a first feedback signal; the reference sensor is used to selectively isolate the target gas in the ambient gas to produce a zero gas and to detect the zero gas to obtain a second feedback signal, the calculation module is used to calculate a difference between the first feedback signal and the second feedback signal to obtain a third feedback signal, and to obtain a target gas concentration by calculating the third feedback signal according to a calibration formula. The invention improves the measurement accuracy to the target gas concentration, which are efficient and reliable and have good technical effects.

A Discrete Sample Introduction Module (DSIM) apparatus includes an internal tubing system to receive into the DSIM apparatus a discrete gas sample having a received concentration. A plurality of valves selectively partitions the internal tubing system to form a plurality of loops corresponding to a plurality of loop volumes to contain the discrete gas sample. The plurality of loop volumes receives a carrier gas to dilute the discrete gas sample to a plurality of preselected dilutions. The DSIM apparatus circulates a given one of the plurality of preselected dilutions for analysis by a spectrometer coupled to the DSIM apparatus.

An apparatus for determining a presence, a concentration or a change in concentration of a target material in an environment is disclosed. The apparatus comprises first and second sensors configured to respond to the target material. The apparatus further comprises a fluid inlet in fluid communication with the environment, and a valve assembly having a first and second configuration. In the first configuration, the fluid inlet is in fluid communication with only the first sensor. In the second configuration, the fluid inlet is in fluid communication with the first sensor and the second sensor.