Abstract:
An air quality monitoring system comprising: a plurality of particulate matter, PM, sensors, the plurality of PM sensors positioned at a corresponding plurality of positions in a monitoring area; and an air quality processing device coupled to each of the plurality of PM sensors via a communications network, the air quality processing device configured to: receive a particulate level signal from at least two of the plurality of PM sensors; and determine particulate matter flow between the at least two PM sensors based on the corresponding particulate level signals.
Abstract:
One variation of a method includes, during a calibration period: triggering collection of an initial bioaerosol sample by an air sampler located in an environment; and triggering dispensation of a tracer test load by a dispenser located in the environment; accessing a detected barcode level of a barcode detected in the initial bioaerosol sample; accessing a true barcode level of the barcode contained in the tracer test load; and deriving a calibration factor for the environment based on a difference between the detected barcode level and the true barcode level. The method further includes, during a live period succeeding the calibration period: triggering collection of a first bioaerosol sample by the air sampler; accessing a detected pathogen level of a pathogen detected in the first bioaerosol sample; and interpreting a predicted pathogen level of the pathogen in the environment based on the detected pathogen level and the calibration factor.
Abstract:
An air sampling system and method are provided to collect air samples from a plurality of air sample inlets. Before or after transmitting an air sample originating from one of the sample inlets, a signal gas is transmitted via the sample line in accordance with one of a plurality of predefined burp patterns, each of which uniquely corresponds to a different one of the sample inlets. The sample line is monitored for the signal gas in accordance with the predefined burp patterns. Based on detection of the signal gas in the sample line in accordance with one of the predefined burp patterns, a related action is taken. The related action can be identifying the sample inlet from which the air sample originated, or further transmitting the air sample via the sample line.
Abstract:
An air sampling system configured to detect an air quality metric for a plurality of volumetric regions comprises an air sample return unit, an air flow controller, and at least one sensor. The air sample return unit is configured to independently transfer air from the plurality of regions as a plurality of air samples. The air flow controller is configured to receive each of the plurality of air samples and selectively direct a selected sample to a sensor supply line and the remainder of the samples to a sample purge line. The at least one sensor is configured to measure an air quality metric of the selected sample and communicate the air quality metric to a controller. The remainder of the air samples are directed to the air sample return unit throughout operation.
Abstract:
The invention relates to a system intended for capturing and/or collecting area biological particles by means of multi-rotors (1), wherein, firstly, the system for capturing aerobiological particles can be disposed on any part of the multi-rotor where there is a positive airflow caused by the blades of same or by the surrounding air current generated, and, secondly, the system incorporates measuring sensors, installed together with the capturing system, the measuring sensors being able to obtain the flow, quantity and speed of the air and temperature, moisture and CO2 levels.
Abstract:
A method of determining at least one point of entry of smoke into a smoke detection system, the system having a sampling pipe network including at least one sampling pipe and a plurality of sampling inlets through which an air sample can enter the at least one sampling pipe of the smoke detection system for analysis by a particle detector, said method including: determining a volume of sample air that has passed through at least part of the smoke detection system since a predetermined event or a value corresponding to said volume; and determining through which sampling inlet of the plurality of sampling inlets the smoke entered the smoke detection system based, at least in part, on the determined volume or value. Systems for implementing such a method and related methods are also described.
Abstract:
An inlet duct (101) to a gas turbine (not shown) has an inlet air filter (102). The filter is provided to remove dust from the inlet air flow (103), which can otherwise degrade the efficiency of the gas turbine and/or cause wear of the turbine. Associated with the duct is a filter monitor (1), having up- and down-stream probes (2, 3) mounted in the side wall (104) of the duct, one (2) upstream of the filter (102) and the other (3) downstream of it. Central to the monitor is a laser particle counter (4). Up- and down-stream sample lines (5, 6) lead from the probes to respective two-way, three-port, electro-actuated valves (7, 8), connected to an inlet (9) of the particle counter. A pump (10) is provided at the outlet (11) of the counter A micro-controller (24) is connected to the valves (7, 8) for controlling their state in accordance with a sampling/purging cycle. Via data line (25), the micro-controller is connected to the particle counter (4).
Abstract:
An air monitoring system includes a tubing having an electrically conductive inner surface. In one embodiment, the liner includes carbon based materials, such as for example carbon nanotubes. In another embodiment, a conductive layer is adhered to a substrate.
Abstract:
Embodiments of the present invention are directed to methods and devices for determining freshness of food products, and materials and devices related thereto. In some embodiments, a sensor device is provided which may include an ergonomic body including a slot for receiving a sensor card, a microcontroller, a plurality of LEDs for displaying operational status of the sensor device and/or displaying a result and audio means for audibly presenting operation status of the sensor device and/or audibly presenting a result. The device may also include a control program operating on the microcontroller for operating the sensor device and for determining a freshness of food, a first air inlet for placement proximate to a food product to receive air from around a food product for testing and a replaceable sensor card including a plurality of sensors an a sensor card inlet and a sensor card outlet.
Abstract:
A system (42) is disclosed for condensation particle counting in conjunction with modifying an aerosol to enhance the formation and growth of droplets of a selected working fluid, preferably water. Before saturation with the working fluid, the aerosol is exposed to an aerosol modifying component (54), preferably a vapor including molecules that are adsorbed onto surfaces of the particles or other elements suspended in the aerosol. Adsorption alters the surface character of the suspended elements towards increased affinity for the vapor of the working fluid, to promote the formation and growth of working fluid droplets. The droplets are optically detected to indicate numbers and concentrations of the suspended elements.