Respectfully, and with no offense intended, I’ll raise an exception here.
Crusher pressure measurements are an expression of the total area under the pressure curve.
Transducer pressure measurements are an expression of the highest amplitude pressure observed.
In short, the two pressure measurement methodologies measure and describe different events. As such, there is no meaningful way to convert crusher measurements to PSI measurements and no meaningful way to convert PSI measurements to crusher measurements. Attempts to do so have a lot in common with trying to convert square foot measurements to linear foot measurements.