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Re: NHTSA 2001 Tire Pressure Survey - And How to Change Habits
The result could be that many (most?) people are now relying upon a system which might have accuracy as good as ±20%. That's probably good enough to prevent truly dangerous under- or over-inflation, but is not as verifiable as a pressure gauge.
I've used pressure transducers in industrial/commercial applications since the 1980's, and the BEST of those include instructions for periodical calibration. You're not going to get that from a $40 fixed transducer with a battery power pack. I don't mean to imply that the RETAIL price is $40, but the producer's cost.
The old and still valid axiom is that a person with a clock always "knows" what time it is, while a person with two clocks is always in doubt.
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