Aerosols Articles

  • Micro Pulse LiDAR: A Critical Tool for Emissions Source Detection

    Micro Pulse LiDAR remote sensing data are used to calculate a highly accurate Planetary Boundary Layer (PBL) height to improve plume models that help assess emissions sources. ...

  • Novel Techniques for Containment

    Abstract: Recently published scientific papers feature various aspects of pandemic “star” Coronavirus 19. This virus has significantly changed pharma research and production in a variety of unique ways. This white paper will focus on how research/production efforts might fail under the threats of highly contagious disease viruses, bacteria, and highly active ...


    By Flow Sciences Inc

  • Micro Pulse LiDAR enhances global aviation safety - Case study

    To address the need for better information about volcanic ash events, the Toulouse Volcanic Ash Advisory Center (VAAC) asked Météo-France (MF), the French national meteorological service, to focus on the ash issue. MF set out to determine the best method of providing accurate information about the size and concentration of volcanic particles from the ground up to a minimum of 12 km ...

  • Certification - Choosing the Most Suitable Particle Sample Point Locations in the Cleanroom

    Cleanroom certification is based on ISO 14644-1, “Classification of air cleanliness by particle concentration” standards. The specifics of the assessment may vary slightly for FDA or EU GMP regulations, but the underlying methodology is standard. Certification demonstrates that the entire area meets ...


    By Particle Measuring Systems

  • Flow-induced errors in airborne in situ measurements of aerosols and clouds

    Abstract. Aerosols and clouds affect atmospheric radiative processes and climate in many complex ways and still pose the largest uncertainty in current estimates of the Earth’s changing energy budget. Airborne in situ sensors such as the Cloud, Aerosol, and Precipitation Spectrometer (CAPS) or other optical spectrometers and optical array probes provide detailed information about the ...

  • Is your Wastewater Spreading Viruses?

    Concerned about your wastewater spreading contaminants into its surroundings? Our no-splash best-in-class subsurface TORNADO® Aerators prevent aerosolizing and limit the spread of pollutants. Read this informative article to learn more about how wastewater can contribute to the spread of contamination: ...


    By Fluence Corporation

  • Pinpointing a particle source with the Handilaz Mini II handheld aerosol particle counter

    Pinpointing a particle source can be a challenge in cleanrooms and laboratory flow equipment where the movement of clean air (which is the purpose of the air handling system) can mask particle generators such as faulty filters, motors, robots, operators and residual dust.  The Particle Measuring Systems Handilaz® Mini II handheld particle counter has two significant advantages to help ...


    By Particle Measuring Systems

  • Multiple users in a Biosafety Cabinet compromise containment

    Abstract Biosafety Cabinets (BSCs) are primary containment devices used to help reduce the risk of contamination to the work, the worker, and the surrounding environment. These devices have rigorous testing and certification to ensure their functional capabilities of contaminant reduction according to NSF International Standard 49 but these BSCs are always tested empty without users present ...


    By The Baker Company

  • Which Sensor is right for my application?

    The MiniPID 2 Sensor is offered in five models having the guaranteed range of operation below (Isobutylene equivalent). They are insensitive to humidity changes, providing unparalleled performance in a variety of applications: MiniPID 2 PID PPM has a linear dynamic range of 0 – >4000 ppm. MiniPID 2 PID 10.0 eV has a linear dynamic range of 0 – >100 ppm. MiniPID ...


    By Ion Science Ltd.

  • First airport in the world to install HI-SCAN 6040 CTiX - Case Study

    JEJU INTERNATIONAL AIRPORT FUTURE-PROOFS SECURITY CHECKPOINT WITH SMITHS DETECTION Summary Jeju International Airport is the second largest airport in Korea, but as the only international airport on Jeju island, it has recently faced capacity challenges due to the influx of visitors. To overcome this, the Smiths Detection ...


    By Smiths Detection Inc.

  • The Basics of a Fiber Bed Filter

    Fiber bed mist eliminators capture, collect, and remove liquid particle mists, sub-micron particles and harmful aerosols that cause pollution in the atmosphere. This pollution can take form as opacity, smoke, and blue haze. The pollution that is caused by mist is a product of operations of chemical and industrial processes such as, asphalt processing, acid mist control, Lube oil vents & ...


    By Kimre Inc.

  • Nanoparticles

    Nanoparticle Definition “Nanoparticle” is a catch-all term. There is no consensus on definitions or nomenclature for nanoparticles or nano aerosols. Other terms for this material include “Ultrafine Particle” (less than 100 nm in diameter). Current terminology for measuring worker exposure to particulates does not take particle size ranges into account. ...

  • Drops in a Cloud: An SBIR-funded spectrometer is at the forefront of global climate research

    Weeks before the athletes took to the ice and snow at the 2018 Winter Olympics in South Korea, Dr. Duncan Axisa was in the mountains around PyeongChang, studying ice-forming particles. Later in the year, Axisa traveled to India to study monsoon clouds, and to France to participate in a trans-national ice-nucleation experiment. Axisa and his team travel around the globe to help scientists better ...

  • Weather monitoring in extreme conditions

    A VENTUS X ultrasonic wind sensor has been deployed by researchers at the Summit Station on the Greenland Ice Sheet in the Arctic, 10,000 feet above sea level, as part of a project investigating the role of aerosols in cloud formation. With integrated heaters and no moving parts, the wind sensor does not require recalibration – a vital feature of equipment in one of the most remote ...


    By OTT HydroMet

  • KNMI purchased 50 units of CHM15k - Case Study

    Long before automated weather stations were available, weather and clouds were already observed visually by officially trained and certified meteorological observers. Today, there are still human observers active in many weather services around the globe. Observers look at the sky and estimate cloud fraction in octa and the height of the cloud base. This provides essential information for ...


    By OTT HydroMet

  • Ceilometer Network ALICEnet - Case Study

    ALICEnet is a network of measuring stations operated by Italian research institutions and environmental authorities to improve the multidisciplinary use of environmental data. It is able to generate an atmospheric profile in real time, carried out by automatic Lidar ceilometers (ALC) installed throughout Italy. A database with measurement results from previous studies is also provided (yellow ALC ...


    By OTT HydroMet

  • SITHERMO: Development of a Novel Lidar System for the Profiling of Atmospheric Aerosols and Temperature (project code: Τ1ΕDΚ-02525) - Case study

    Program: Operational Program «Competitiveness, Entrepreneurship and Innovation», under the call RESEARCH – CREATE – INNOVATE Starting date: 25/05/2018 Duration: 36 Μonths Summary: The object of the project is to develop the know-how and subsystems required for the construction of the first ...


    By Raymetrics S.A.

  • Signal to Noise Ratio Estimations for a Volcanic Ash detection lidar

    In this paper we calculate the Signal-to-Noise (SNR) ratio of a 3-channel commercial volcanic ash detection system, (Raymetrics lidar model LR111-D300), already in operation for the Met Office organization. The methodology for the accurate estimation is presented for day and nighttime conditions. The results show that SNR values are higher than 10 for ranges up to 13 km for both nighttime and ...


    By Raymetrics S.A.

  • A large source of cloud condensation nuclei from new particle formation in the tropics

    Cloud condensation nuclei (CCN) can affect cloud properties and therefore Earth’s radiative balance1–3. New particle formation (NPF) from condensable vapours in the free troposphere has been suggested to contribute to CCN, especially in remote, pristine atmospheric regions4, but direct evidence is sparse, and the magnitude of this contribution is uncertain5–7 . Here we use ...

  • Selecting an Airborne Particle Counter: Number of Monitoring Locations (Series Part 3 of 4)

    After choosing the monitoring method, determine how many monitoring locations or particle counters you need. If the area of your cleanroom is 1,000 m2 or less, use Table A.1 provided in ISO 14644-1:2015. If your area is greater than 1,000 m2, first divide the cleanroom area (in m2) by 1,000. Then multiply this number by 27. Remember that this is the minimum ...


    By Particle Measuring Systems

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