A device includes a gas-measuring unit and a sound-measuring unit. The gas-measuring unit has a gas sensor detecting a first measured variable, and a gas analysis module determining a gas concentration from the first variable and comparing the concentration with a first threshold value, to output a first signal based thereon. The sound-measuring unit has a sound detection unit detecting a second measured variable, and a sound analysis module determining a status variable, from the second variable, indicating a noise exposure, and comparing the status variable with a second threshold value to determine a first parameter indicating a current sound level and/or determining a second parameter indicating a sound exposure accumulated over a time interval. The sound analysis module may determine the status variable, the first parameter and/or the second parameter as a function of the comparison of the gas concentration and the first threshold value.

There is provided a device comprising a degassing valve, a conduit for collecting gas released from the degassing valve, a gas sensor able to detect a gas connected to the conduit and arranged to provide a signal corresponding to a concentration of the gas, an alarm device arranged to receive the signal from the gas sensor and to provide an alarm when the concentration of the gas is above a threshold level.

There is disclosed a system including a portable CO2 measuring device and a mobile device, the mobile device including a processor and a display, the mobile device storing software, the mobile device configured to communicate with the portable CO2 measuring device, the portable CO2 measuring device configured to measure CO2 measurement data, wherein the software is executable on the mobile device to receive the CO2 measurement data from the CO2 measuring device, and to display CO2 measurement results derived from the CO2 measurement data on the display of the mobile device.

An engine assembly includes an internal combustion engine and a carbon monoxide (CO) sensor unit. The CO sensor unit includes a CO sensor controller including a CO sensing circuit configured to detect a level of CO and a shutdown circuit. The shutdown circuit is configured to receive a detected level of CO and calculate a trailing window average of the detected level of CO. The trailing window average includes an average of the detected level of CO over a predetermined sampling window. The shutdown circuit is further configured to determine whether to initiate a shutdown of the internal combustion engine based on at least the calculated trailing window average and a predetermined trailing window average threshold and initiate the shutdown of the internal combustion engine based on determining that the trailing window average exceeds the predetermined trailing window average threshold.

A passive optical methane detection and monitoring system for fixed-position installation is disclosed. The system disclosed can be a compact scannable field of view Near Infrared (NIR) filter photometer to detect and quantify methane concentration. A randomized fiber optic bundle is disclosed that can be used to direct the randomized total optical power from a collection lens to two or more isolated optical channels. Band pass filters isolate a desired wavelength range for transmission measurements for the two or more channels. Also disclosed is a dynamic detection mode that works as a flag to detect a plume of methane moving within the field of view. In other embodiments, a second methane detection device can be added at a second perimeter position to provide a three dimensional concentration grid.

Grinders, analyzers, and related technologies are described herein. The grinders can hold foodstuff that is periodically ground. The analyzers can analyze the foodstuff to determine information about the state of the foodstuff. Algorithms can be used to determine how to process the foodstuff, how to use the foodstuff, and/or when to discard the foodstuff. The grinder can be a portable, rechargeable electric coffee grinder configured to monitor the freshness of the coffee beans. When coffee beans become stale, they can be discarded and the coffee grinder can be refilled with fresh coffee beans.

The invention provides an indoor air quality monitor (10) which has: a housing (12) providing an air intake (24) leading via a flow path, which is formed within the housing and which comprises a flow chamber (70), to an air outlet (28); a fan arranged to M propel air from the air intake (24) through the flow path to the air outlet (28); at least one sensor (56, 58, 60, 62) which is for sensing at least one air pollutant, the sensor (56, 58, 60, 62) being exposed to air in the flow chamber (70); and an air guide arrangement (46, 48, 64, 66, 74) which is downstream of the air intake (24) in the flow path and which forms a plurality of flow passages (76, 78, 80) through each of which air passes in operation of the indoor air quality monitor to reach the flow chamber (70).

A display assembly system which detects abnormal operating conditions, such as gas recirculation or airway occlusion, is provided. An electronic display is located within a housing. Sensors measure characteristics of ambient air ingested by a thermal management subsystem. Weather conditions are gathered for a location, and measurements are received from the sensors regarding characteristics of the ingested ambient air. An alert is generated if the measurements change at a rate different from a rate of change of the weather conditions by at least a predetermined amount.

Methods of and apparatus for monitoring the health of a fuel oxygen conversion unit for a vehicle or a vehicle engine are provided. For example, a method comprises providing a distribution of sensed values obtained from a plurality of sensors distributed along an axial length of a gas oxygen reduction unit of the fuel oxygen conversion unit and determining the health of the fuel oxygen conversion unit from the distribution. As another example, a fuel oxygen conversion unit defines a circulation gas flowpath from a fuel gas separator to a contactor and comprises a gas oxygen reduction unit positioned in the circulation gas flowpath for reducing an oxygen content of a flow of stripping gas through the circulation gas flowpath. A plurality of sensors are distributed along an axial length of the gas oxygen reduction unit.

A monitoring system (100″) is for aeronautical personnel (99), such as aircraft operators, pilots, co-pilots or passengers of airplanes or aircraft, such as aircraft or helicopters of civil or military aviation, passenger aircraft in scheduled or charter traffic, in particular also ultra-fast aircraft. The monitoring system includes a sensor system (60) for a measurement-based monitoring of the gas concentration. The operation of the monitoring system (100″) can be configured by an external input/output unit (450) or an external output unit (460).