Various embodiments of the present disclosure are directed to measuring rims and methods for measuring a brake abrasion of a wheel brake having a measuring rim. In one embodiment, consistent with the present disclosure, a measuring rim is disclosed including a circumferential tire support surface connected on one side to an end wall and on an opposite side to a seal to form an outwardly closed inner space, and a rotary feed-through provided on a central region of the end wall, the rotary feed-through configured to supply a gaseous medium to the inner space of the measuring rim and remove it therefrom.

Various embodiments of the present disclosure are directed to measuring rims and methods for measuring a brake abrasion of a wheel brake having a measuring rim. In one embodiment, consistent with the present disclosure, a measuring rim is disclosed including a circumferential tire support surface connected on one side to an end wall and on an opposite side to a seal to form an outwardly closed inner space, and a rotary feed-through provided on a central region of the end wall, the rotary feed-through configured to supply a gaseous medium to the inner space of the measuring rim and remove it therefrom.

A method of operating an aspirating fire detector system (3) including a fire detector (19), a conduit (7) having an inlet and being connected to the fire detector (19), a ventilator (15) configured to draw air through the inlet of the conduit (7) and into the fire detector (19), a pressure sensor (13) configured to sense the pressure of air being that is drawn through the inlet and into the fire detector (19), and a flow meter (17) configured to measure the flow of the air drawn through the inlet and to the fire detector (19).

A method of operating an aspirating fire detector system (3) including a fire detector (19), a conduit (7) having an inlet and being connected to the fire detector (19), a ventilator (15) configured to draw air through the inlet of the conduit (7) and into the fire detector (19), a pressure sensor (13) configured to sense the pressure of air being that is drawn through the inlet and into the fire detector (19), and a flow meter (17) configured to measure the flow of the air drawn through the inlet and to the fire detector (19).

A method of air quality notification is disclosed. The method includes steps of providing a portable air quality monitoring device for monitoring air quality. The portable air quality monitoring device monitors the ambient air quality at a location in a monitoring period of time to generate a monitoring data, and has a GPS component to generate a position data of the location, both of them can be integrated as a notification data and delivered. A cloud data processing device is provided for receiving the notification data delivered from the portable air quality monitoring device, wherein the notification data is processed, calculated and converted to generate a push data, and the push data is delivered at a push period through a push notification service. A notification receiving device is provided for receiving the push data delivered from the cloud data processing device, so as to display the push data immediately.

A gas sampler (30) is provided with a connection portion (C1) connectable to a sample tank (20), a sample loop (PL) for holding a sample gas introduced from the sample tank (20) to the connection portion (C1), pneumatic switching valves (V1 to V6) for switching a flow path connected to the sample loop (PL), a control piping (81) for transmitting a driving pressure to the switching valves (V1 to V6), a pump (31) for suctioning an inside of the sample loop (PL), and a pressure accumulation tank (80) for accumulating the pressure generated by the operation of the pump (31) as a source pressure.

A gas sampler (30) is provided with a connection portion (C1) connectable to a sample tank (20), a sample loop (PL) for holding a sample gas introduced from the sample tank (20) to the connection portion (C1), pneumatic switching valves (V1 to V6) for switching a flow path connected to the sample loop (PL), a control piping (81) for transmitting a driving pressure to the switching valves (V1 to V6), a pump (31) for suctioning an inside of the sample loop (PL), and a pressure accumulation tank (80) for accumulating the pressure generated by the operation of the pump (31) as a source pressure.

The present subject disclosure discloses devices, systems, and methods related to collection and recovery of Aerosols and Bioaerosols for analysis. The system includes an omni-directional inlet assembly that is easily removed for decontamination and can be replaced with an already clean inlet assembly or with directional inlets or other tools for collection from animal breathing zones, air ducts, air nearing moving vehicles and other sampling scenarios. Further, the system includes other features that enable the device to be lower in cost than other similar systems while providing improved usability and performance.

The present subject disclosure discloses devices, systems, and methods related to collection and recovery of Aerosols and Bioaerosols for analysis. The system includes an omni-directional inlet assembly that is easily removed for decontamination and can be replaced with an already clean inlet assembly or with directional inlets or other tools for collection from animal breathing zones, air ducts, air nearing moving vehicles and other sampling scenarios. Further, the system includes other features that enable the device to be lower in cost than other similar systems while providing improved usability and performance.

The present disclosure relates to aspirating smoke detectors (ASD). In an ASD, ambient air is aspirated and is fed to a fire detector unit for determining a signal level. For normal operation, the suction power is set to a nominal airflow value and this is increased from a minimum signal level value in order to shorten the transport time of aspirated smoke through the suction pipe to the fire detector unit. In some embodiments, an interruption signal provided for normal operation is output if the airflow exceeds an upper limit value for a minimum period. Independently thereof, the suction power is increased from the minimum signal level value only to the extent that the airflow does not exceed the upper limit value. Or, regardless thereof, the suction power is increased only for a timespan smaller than the minimum period in which the airflow exceeds the upper limit value.