Output of 4-20 mA data is offered in terms of r.m.s., peak, and now also in Wilcoxon’s exclusive true peak and true peak-to-peak.  True peak detection is ideal for measuring short duration vibration, when it is most important to capture and hold maximum absolute instantaneous events.  True peak-to-peak detection is designed for use with displacement measurements, which captures and holds the maximum total vibration.  The 4-20 mA loop output signal can also represent the true root-mean-square (r.m.s.) value of the vibration signal or the equivalent peak vibration (obtained by multiplying by the ratio of peak to r.m.s., 1.414).   Peak and r.m.s. detection are best for general machine health monitoring, when overall vibration is measured.