Bently Nevada 3300/20-12-01-02-00-00 Dual Thrust Position MonitorDescription The Bently Nevada 3300 20 12 01 02 00 00 is a Dual Thrust Position Monitor that continuously measures and monitors two independent channels of shaft axial position relative to the axial clearances within the machine. It provides early warning of thrust bearing failure by observing the gap voltage of proximity probes. Specifications Model: 3300 20 12 01 02 00 00 Type: Dual Thrust Position Monitor Full scale range: 25 0 25 mils, 30 0 30