Talk:Brake fluid pressure sensor

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What does this sensor do?

Although I'm sure that some vehicle, somewhere, is using a "fluid pressure sensor", this is not a common fitment. The sensors which are more commonly used are not simply sensing pressure, and it's confusing to describe the article as if it does.

Some 1950s-1960s vehicles used a pressure sensor to activate rear brake lights, but this was soon replaced by a pedal switch (reducing potential points of failure in the hydraulic circuit). Since the 1970s, level sensors in the fluid reservoir have monitored a loss of fluid (but not pressure). Since the 1980s, split circuit systems have also included pressure differential sensors, which measure an imbalance between the two circuits, indicating a loss of pressure in one. ABS systems have made these ubiquitous. Perhaps, the next generation of BAS (still almost unheard of) might sense simple absolute pressure, but this is not clear in this article.

Fluid pressures (and levels) are certainly sensed in a modern braking system, but this article is confusing, overlapping and undersourced as to just what is measured and why. Andy Dingley (talk) 10:27, 1 October 2018 (UTC)[reply]