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Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils

Author

Listed:
  • Qutaiba M. Saleh

    (Department of Computer Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA)

  • Edward C. Hensel

    (Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA)

  • Risa J. Robinson

    (Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA)

Abstract

In electronic nicotine delivery systems (ENDS), coil resistance is an important factor in the generation of heat energy used to change e-liquid into vapor. An accurate and unbiased method for testing coil resistance is vital for understanding its effect on emissions and reporting results that are comparable across different types and brands of ENDS and measured in different laboratories. This study proposes a robust, accurate and unbiased method for measuring coil resistance. An apparatus is used which mimics the geometric configuration and assembly of ENDS reservoirs, coils and power control units. The method is demonstrated on two commonly used ENDS devices—the ALTO by Vuse and JUUL. Analysis shows that the proposed method is stable and reliable. The two-wire configuration introduced a positive measurement bias of 0.086 (Ω), which is a significant error for sub-ohm coil designs. The four-wire configuration is far less prone to bias error and is recommended for universal adoption. We observed a significant difference in the coil resistance of 0.593 (Ω) ( p < 0.001) between the two products tested. The mean resistance and standard deviation of the reservoir/coil assemblies was shown to be 1.031 (0.067) (Ω) for ALTO and 1.624 (0.033) (Ω) for JUUL. The variation in coil resistance between products and within products can have significant impacts on aerosol emissions.

Suggested Citation

  • Qutaiba M. Saleh & Edward C. Hensel & Risa J. Robinson, 2020. "Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils," IJERPH, MDPI, vol. 17(21), pages 1-16, October.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:21:p:7779-:d:434048
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    References listed on IDEAS

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    1. Nathan Eddingsaas & Todd Pagano & Cody Cummings & Irfan Rahman & Risa Robinson & Edward Hensel, 2018. "Qualitative Analysis of E-Liquid Emissions as a Function of Flavor Additives Using Two Aerosol Capture Methods," IJERPH, MDPI, vol. 15(2), pages 1-14, February.
    2. Sébastien Soulet & Marie Duquesne & Jean Toutain & Charly Pairaud & Maud Mercury, 2019. "Impact of Vaping Regimens on Electronic Cigarette Efficiency," IJERPH, MDPI, vol. 16(23), pages 1-15, November.
    3. Sébastien Soulet & Marie Duquesne & Jean Toutain & Charly Pairaud & Hélène Lalo, 2018. "Influence of Coil Power Ranges on the E-Liquid Consumption in Vaping Devices," IJERPH, MDPI, vol. 15(9), pages 1-14, August.
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    Cited by:

    1. Dominic L. Palazzolo & Jordan Caudill & James Baron & Kevin Cooper, 2021. "Fabrication and Validation of an Economical, Programmable, Dual-Channel, Electronic Cigarette Aerosol Generator," IJERPH, MDPI, vol. 18(24), pages 1-26, December.
    2. Edward C. Hensel & Nathan C. Eddingsaas & Qutaiba M. Saleh & Shehan Jayasekera & Samantha Emma Sarles & A. Gary DiFrancesco & Risa J. Robinson, 2022. "Proposed Standard Test Protocols and Outcome Measures for Quantitative Comparison of Emissions from Electronic Nicotine Delivery Systems," IJERPH, MDPI, vol. 19(4), pages 1-19, February.
    3. Qutaiba M. Saleh & Edward C. Hensel & Nathan C. Eddingsaas & Risa J. Robinson, 2021. "Effects of Manufacturing Variation in Electronic Cigarette Coil Resistance and Initial Pod Mass on Coil Lifetime and Aerosol Generation," IJERPH, MDPI, vol. 18(8), pages 1-11, April.

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