IRISS Sonus PD X Handheld Switchgear Partial Discharge Detector schaefer 483s112 (depending on configuration) 15 percent Pin Moisture Meter (depending on configuration) 15 percent lighter and 30 percent smaller than competing units Shell mountable swiveling anchor for traditional SRL placement 3 4" lightweight aluminum connector High 420 lb capacity Maximum arresting fall force of 900 lbs Six ft retractable lanyard Strong Lightweight and portable safety The unit detects Transient Earth Voltage (TEV) signals generated by internal partial discharge as well as ultrasound acoustic discharge generated by PD phenomenon PD detection can be utilized to detect early warning signs of equipment insulation failure