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Article

Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils

1
Department of Computer Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA
2
Department of Mechanical Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(21), 7779; https://doi.org/10.3390/ijerph17217779
Received: 10 September 2020 / Revised: 21 October 2020 / Accepted: 22 October 2020 / Published: 24 October 2020
(This article belongs to the Section Health Behavior, Chronic Disease and Health Promotion)
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. View Full-Text
Keywords: coil resistance; e-cigarette; electronic nicotine delivery system; pod style; atomizer coil resistance; e-cigarette; electronic nicotine delivery system; pod style; atomizer
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MDPI and ACS Style

Saleh, Q.M.; Hensel, E.C.; Robinson, R.J. Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils. Int. J. Environ. Res. Public Health 2020, 17, 7779. https://doi.org/10.3390/ijerph17217779

AMA Style

Saleh QM, Hensel EC, Robinson RJ. Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils. International Journal of Environmental Research and Public Health. 2020; 17(21):7779. https://doi.org/10.3390/ijerph17217779

Chicago/Turabian Style

Saleh, Qutaiba M.; Hensel, Edward C.; Robinson, Risa J. 2020. "Method for Quantifying Variation in the Resistance of Electronic Cigarette Coils" Int. J. Environ. Res. Public Health 17, no. 21: 7779. https://doi.org/10.3390/ijerph17217779

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