Temperature and pressure effects on the performance of the portable TSI 3007 condensation particle counter: Implications on ground and aerial observations

Bezantakos, S.; Biskos, George

doi:10.1016/j.jaerosci.2021.105877

Cited by 6 publications

(7 citation statements)

References 34 publications

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“…In general, we found a similar trend for the pressure-dependent performance as shown in other publications (e.g. Takegawa and Sakurai, 2011;Zhang and Liu, 1991;Bezantakos and Biskos, 2021;Mei et al, 2021): With decreasing pressure the plateau counting efficiency η∞ is decreasing, the cut-off diameter dp,50 is increasing and the edge steepness ε is decreasing. At 1000 hPa and 750 hPa both CPC-models fulfill the CEN/TS 16976:2016 criteria.…”

Section: Discussionsupporting

confidence: 90%

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Pressure-dependent performance of CEN-specified Condensation Particle Counters

Bauer

Spät

Eisenhut

et al. 2022

Preprint

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Abstract. One of the most important parameters to quantify an aerosol is the particle number concentration. Condensation Particle Counters (CPCs) are commonly used to measure the aerosol number concentration in the nanometer range. To compare the data from different measurement stations and campaigns it is important to harmonize the instrument specifications, which is why the Technical Specification CEN/TS 16976:2016 was introduced for CPCs. There, the parameters of the CEN-CPC are specified for standard pressure and temperature. However, CEN-CPCs are used in various surroundings, on high mountains or on airplanes, where they are exposed to low-pressure conditions. Here, we present the pressure-dependent performance (including the concentration linearity and counting efficiency) of two different models of CEN-CPCs, the Grimm 5410 CEN and the TSI 3772-CEN. We found that their performance at 1000 hPa and 750 hPa was in accordance with the CEN-technical-specifications. Below 500 hPa, the performance decreased for both CPC-models, but the decrease was different for the two models. To gain insight into the performance of the two CPC-models, we performed a simulation study. This study included simulations of the saturation profiles and calculations of internal particle losses within the CPCs. The simulations reproduced the overall performance decrease with decreasing pressure and reveal that the internal structure of the CPC has a significant influence on the performance. We anticipate our publication to provide a deeper understanding of the counting efficiency of CPCs and their pressure dependence. Our findings might be a starting point for new standards that include the pressure-dependent performance or they could help for designing new CPCs.

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Section: Discussionsupporting

confidence: 90%

“…Hermann et al, 2005;Williamson et al, 2018) of the CPC or by altering the saturator and condenser temperatures (e.g. Hermann and Wiedensohler, 2001;Bezantakos and Biskos, 2021). Another approach to compensate for the pressure-dependent effects might be to utilize the implications of Eq.…”

Section: Discussionmentioning

confidence: 99%

Pressure-dependent performance of CEN-specified Condensation Particle Counters

Bauer

Spät

Eisenhut

et al. 2022

Preprint

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“…The particle number concentration was continuously monitored using a BH-CPC, while the electric current was recorded using the aerosol electrometer of TSI-AE3068B (TSI Incorporated, Minneapolis, MN, USA). The particle number concentration can be obtained from the Equation (4) [36]:…”

Section: Discussionmentioning

confidence: 99%

Investigation into Detection Efficiency Deviations in Aviation Soot and Calibration Particles Based on Condensation Particle Counting

Chen,

Zhou,

et al. 2024

Symmetry

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Aviation soot constitutes a significant threat to human well-being, underscoring the critical importance of accurate measurements. The condensation particle counter (CPC) is the primary instrument for quantifying aviation soot, with detection efficiency being a crucial parameter. The properties of small particles and the symmetry of their growth pathways are closely related to the detection efficiency of the CPC. In laboratory environments, sodium chloride is conventionally utilized to calibrate the CPC’s detection efficiency. However, aviation soot exhibits distinctive morphological characteristics compared to the calibration particles, leading to detection efficiencies obtained from calibration particles that may not be applicable to aviation soot. To address this issue, a quantitative study was performed to explore the detection efficiency deviations between aviation soot and calibration particles. The experiment initially utilized a differential mobility analyzer to size select the two types of polydisperse particles into monodisperse particles. Subsequently, measurements of the separated particles were performed using the TSI Corporation’s aerosol electrometer and a rigorously validated CPC (BH-CPC). These allowed for determining the detection efficiency deviation in the BH-CPC for the two types of particles at different particle sizes. Furthermore, the influence of the operating temperature of the BH-CPC on this detection efficiency deviation was investigated. The experimental results indicate a significant detection efficiency deviation between aviation soot and sodium chloride. In the range of 10–40 nm, the absolute detection efficiency deviation can reach a maximum of 0.15, and the relative deviation can reach a maximum of 0.75. And this detection efficiency deviation can be reduced by establishing a relevant relationship between the detection efficiency of the operating temperature and the calibration temperature. Compared to the saturated segment calibration temperature of 50 °C, the aviation soot detection efficiency is closer to the sodium chloride detection efficiency at the calibration temperature of 50 °C when the saturated segment operates at a temperature of 45 °C. These studies provide crucial theoretical guidance for enhancing the precision of aviation soot emission detection and establish a foundation for future research in monitoring and controlling soot emissions within the aviation sector.

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“…In addition, the aerosol particle size distribution was measured by POPS under ambient conditions (no dryer applied) in 2021. The calibrations for both CPC and POPS were performed before and after each deployment (Kuang and Mei, 2016;Mei and Pekour, 2020;Bezantakos and Biskos, 2022), and all flow rates were periodically checked in the field. The CPC sample flow rate is usually 100 cm 3 min −1 , and the total flow rate is 700 cm 3 min −1 with a variability of ±5 %.…”

Section: Tbs Data Quality Controlmentioning

confidence: 99%

Observational data from uncrewed systems over Southern Great Plains

Mei

Pekour

Dexheimer

et al. 2022

Earth Syst. Sci. Data

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Abstract. Uncrewed Systems (UxS), including uncrewed aerial systems (UAS) and tethered balloon/kite systems (TBS), are significantly expanding observational capabilities in atmospheric science. Rapid adaptation of these platforms and the advancement of miniaturized instruments have resulted in an expanding number of datasets captured under various environmental conditions by the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) user facility. In 2021, observational data collected using ARM UxS platforms, including seven TigerShark UAS flights and 133 tethered balloon system (TBS) flights, were archived by the ARM Data Center (https://adc.arm.gov/discovery/#/, last access: 11 February 2022) and made publicly available at no cost for all registered users (https://doi.org/10.5439/1846798) (Mei and Dexheimer, 2022). These data streams provide new perspectives on spatial variability of atmospheric and surface parameters, helping to address critical science questions in Earth system science research. This paper describes the DOE UAS/TBS datasets, including information on the acquisition, collection, and quality control processes, and highlights the potential scientific contributions using UAS and TBS platforms.

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Temperature and pressure effects on the performance of the portable TSI 3007 condensation particle counter: Implications on ground and aerial observations

Cited by 6 publications

References 34 publications

Pressure-dependent performance of CEN-specified Condensation Particle Counters

Pressure-dependent performance of CEN-specified Condensation Particle Counters

Investigation into Detection Efficiency Deviations in Aviation Soot and Calibration Particles Based on Condensation Particle Counting

Observational data from uncrewed systems over Southern Great Plains

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