Boiling Point Measurement of a Small Amount of Brake Fluid by Thermocouple and Its Application

This study describes a new method for measuring the boiling point of a small amount of brake fluid using a thermocouple and a pear shaped flask. The boiling point of brake fluid was directly measured with an accuracy that was within approximately 3 C of that determined by the Japanese Industrial Sta...

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Bibliographic Details
Published in:Journal of forensic sciences 2002-09, Vol.47 (5), p.1-7
Main Author: Mogami, K
Format: Article
Language:English
Subjects:
Braking systems
Forensic sciences
Temperature
Traffic accidents & safety
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Summary:This study describes a new method for measuring the boiling point of a small amount of brake fluid using a thermocouple and a pear shaped flask. The boiling point of brake fluid was directly measured with an accuracy that was within approximately 3 C of that determined by the Japanese Industrial Standards method, even though the sample volume was only a few milliliters. The method was applied to measure the boiling points of brake fluid samples from automobiles. It was clear that the boiling points of brake fluid from some automobiles dropped to approximately 140 C from about 230 C, and that one of the samples from the wheel cylinder was approximately 45 C lower than brake fluid from the reserve tank. It is essential to take samples from the wheel cylinder, as this is most easily subjected to heating.
ISSN:0022-1198
1556-4029
DOI:10.1520/JFS15513J