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Author: search.filters.author.Sriratana, WitsarutSubject: search.filters.subject.Conductivity

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    Conductivity analysis of lubricant in terms of deterioration by using a hall effect sensor
    (2019-11-01)
    Sriratana, Witsarut
    ;
    Prommapit, Sombat
    ;
    Khwankityotha, Yannadech
    ;
    Sriratana, Lerdlekha
    This paper investigates the efficiency of lubricant analysis by using electrical conductor theory that applied to check the performance of the lubricant, it will be indicate a life cycle of lubricant. The measurement process has led Electrochemical cell, Induction coil and Hall Effect sensor for electrochemical field analysis and compare it with electrical conductivity. In conductivity measurement experiment, we consider dynamic measurement velocity at 80 RPM with a lubricant Semi-Synthetic 10W-40 type by 5 different life cycle samples ratio, Used lubricant: Unused lubricant are 100% (4: 0), 75% (3:1), 50% (2:2), 25% (1:3) and 0% (0:4). The voltage output of Hall Effect sensor of 100% sample measurement at 100 degree Celsius is higher than the voltage output of 75%, 50%, 25% and 0% sample are 7.04%, 12.21%, 21.25% and 28.65%, respectively. The average percentage of Hall Effect sensor errors with the dynamic measurement method of the 5 lubricant samples was 2.87. Even though this measurement method had a high percentage of errors, but it has a cost advantage over the current measuring devices such as the Viscometer which is expensive cost.
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    Analysis of liquids conductivity using hall effect sensor based on electromagnetic field properties
    (2017-11-10)
    Sokjabok, Siwakon
    ;
    Sriratana, Witsarut
    ;
    Satthamsakul, Sutham
    This paper presents a new methodology of analyzing liquid conductivity via the Hall Effect sensor based on electrochemical properties. Two different magnetic field cores with the same coil length (10 m, AWG 31) were studied, namely ferrite solenoid cores and toroidal iron powder cores (T131-26). The magnetic field generated by both type of cores was then used to generate a Hall voltage with the cores ratios of 1 : 1. The output Hall voltage is, in turn, sent through a microcontroller, together with a 10 bit converter for real time data analysis. The magnetic-field density of the solenoid for analyzing the conductivity of brine is 31 mT for solenoid, and 10.74 mT for toroid cores, respectively. Results from other materials are compared to the reference conductivity values of salt solution, which amounts to 16.211 mS/cm when assessed with the solenoid core, and 16.406 mS/cm when assessed with the toroid core.