1969-02-01

Boiling Point Precision Data for SAE Brake Fluids 690223

The precision of measuring the boiling point of high boiling brake fluids was determined by 18 laboratories on three brake fluid samples (374, 450, and 550 F). Tests were made using both a heating mantle and an electric heater.
Reproducibility on the 374 and 450 F fluids. Two results (each the average of duplicates), obtained by analysts in different laboratories, should be considered suspect (95% confidence level) if they differ by more than 9 F.
Reproducibility on the 550 fluid. Two results (each the average of duplicates), obtained by analysts in different laboratories, should be considered suspect (95% confidence level) if they differ by more than 19 F.

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