A method for use with a personal protective equipment (PPE) article includes determining, via at least one sensor, a first parameter indicative of a concentration of at least one substance in an ambient environment of the PPE article. The method further includes determining, via a processor, a second parameter indicative of a second order derivative of the first parameter with respect to time. The method further includes retrieving, via the processor, a first threshold value indicative of a protection threshold provided by the PPE article for the at least one substance. The method further includes comparing, via the processor, the second parameter with the first threshold value. The method further includes generating, via the processor, an alert signal based on the comparison of the second parameter with the first threshold value. The method further includes providing, via a user interface, an alert to a user of the PPE article.

An off-gas detection system for mobile equipment includes an off-gas detection device, and a controller. The off-gas detection device is configured to removably couple with the mobile equipment. The off-gas detection device is configured to define a controlled flow path between an electrical energy storage device of the mobile equipment and an off-gas detector. The controller is configured to receive data from the off-gas detector regarding an air sample, determine a presence or concentration of off-gas within the air sample, and initiate one or more actions in response to determining the presence or concentration of off-gas in the air sample.

A process and system analyze data provided by a mobile gas measuring device (3a) for generating an alarm. An alarm management system implements the process and system. The measured data are transmitted to another gas measuring device and/or to a data processing unit (1) and are compared to a limit value. If a limit value violation is detected, an alarm control signal is generated for implementing an instruction for action. A hazard potential is determined and is assigned to the limit value violation in the gas measuring device, the other device, and/or in the data processing unit, taking into consideration weighted influencing variables. Upon a first limit value violation and a second limit value violation being determined, the hazard potentials of these violations are compared and a prioritization is determined based on the comparison. The generation of the alarm control signals is carried out based on the determined prioritization.

An apparatus to locally monitor, and report to a remote monitoring system, specific physical conditions of equipment that provide early indication of failure conditions, including but not limited to: temperature, level of fluids, pressure, temperature, the presence of gases or airborne particulate, and signs leaks.

A system for mitigating thermal runaway in a battery-powered electric vehicle (EV). The system includes a gas sensor configured to measure a level of at least one type of gas in a vicinity of a battery of the EV, a thermal event detector configured to determine, based on the measured level of the at least one type of gas, that the battery is experiencing out-gassing, and a communications interface configured to transmit an alert to a fleet management system regarding the out-gassing of the battery. The fleet management system alters an assignment of the EV in response to the out-gassing of the battery.

A differential monitoring system of carbon dioxide levels within an associated building with a monitoring zone including a quantity of captured carbon dioxide and a reference zone that is spaced away from the monitoring zone. The differential monitoring system includes a first carbon dioxide monitoring inlet disposed within the monitoring zone. A second carbon dioxide monitoring inlet is disposed within the monitoring zone in spaced relation to the first carbon dioxide monitoring inlet and/or is disposed within the reference zone in spaced relation to the first carbon dioxide monitoring zone. A controller is operable to determine when a carbon dioxide level at the second carbon dioxide monitoring inlet exceeds a carbon dioxide level at the first carbon dioxide monitoring inlet by a predetermined differential threshold. The inlets can be part of an aspirated sampling system and/or part of a distributed sensor system. Methods of monitoring carbon dioxide levels are also included.

A method includes attaching a gas capture device to a bypass system adjacent to a gas meter. The method also includes rotating an internal cartridge near the gas meter to a bypass mode. The rotation of the internal cartridge enables gas to be diverted through a bypass system and away from the gas meter into an outlet. Remaining gas is captured from the gas meter to prevent the gas from releasing externally. The gas meter is removed from its original position. The internal cartridge is rotated from the bypass mode to a purge mode.

A system and method for monitoring air quality is disclosed. A housing for an electronic display has a first pathway which extends between an ingestion area and an exhaustion area. An air quality monitoring device is located along said pathway and has one or more sensors that measure the concentration of various gases. The air quality monitoring device has a housing with a second pathway which connects an entrance aperture to exit aperture. The entrance aperture being configured to permit a portion of the ambient air in the first pathway to enter the second pathway.

A system for mitigating thermal runaway in a battery-powered electric vehicle (EV). The system includes a gas sensor configured to measure a level of at least one type of gas in a vicinity of a battery of the EV, a thermal event detector configured to determine, based on the measured level of the at least one type of gas, that the battery is experiencing out-gassing, and a communications interface configured to transmit an alert to a fleet management system regarding the out-gassing of the battery. The fleet management system alters an assignment of the EV in response to the out-gassing of the battery.

A device and process monitor a spatial area for a target gas. A sensor of the gas detection device used has a detection variable (ΔU.sub.korr,0) that is affected by the concentration of target gas. A detection variable sensor measures this detection variable (ΔU.sub.korr,0). The influence of a slower influencing variable and of a faster influencing variable, on the detection variable (ΔU.sub.korr,0), are computationally compensated to determine an influence-corrected detection variable (ΔU.sub.korr,1). Depending on the influence-corrected detection variable (ΔU.sub.korr,1), the target gas concentration is determined. For computational compensation, the time course (Dr[ΔU.sub.korr,0]) of the respective influence of the two influencing variables is estimated, for which a measurement value series from the detection variable sensor is used. The time course (Dr[ΔU.sub.korr,0]) is determined in such a way that the change per time unit of the influence lies within a given change tolerance band (Dr′[ΔU.sub.korr,0].sub.min, Dr′[ΔU.sub.korr,0].sub.max) for this influencing variable.