Product Overview

The Bently Nevada 991-01-XX-01-00 MOD 288865-01​ is a two-wire, loop-powered thrust transmitter that converts the signal from a non-contacting 3300 NSv proximity probe into a 4 to 20 mA output proportional to shaft axial position. It belongs to the Bently Nevada 991 Thrust Transmitter family, the axial-position counterpart to the 990 Vibration Transmitter: where the 990 reports radial shaft vibration in peak-to-peak displacement, the Bently Nevada 991-01-XX-01-00 MOD 288865-01​ reports how far the rotor has moved toward or away from the thrust bearing face, which is the measurement that catches thrust bearing wear, balance-piston problems and coupling misalignment on fluid-film thrust bearings.Because the Proximitor conditioning electronics are integrated into the transmitter housing, the Bently Nevada 991-01-XX-01-00 MOD 288865-01​ removes the separate proximity driver, its panel space and its cabling, so a single two-wire loop carries both power and signal between the machine and the control system. In the ordering structure 991-AA-BB-CC-DD, the designation reads as follows: AA = 01 selects the axial full-scale range, BB = XX leaves the system length to be matched to the probe and extension cable (5.0 m or 7.0 m), CC = 01 specifies 35 mm DIN-rail mounting clips, and DD = 00 indicates the general-purpose build with no hazardous-area agency approval. The suffix MOD 288865-01​ is a factory modification code rather than a separate orderable unit; it identifies the specific internal build variant applied to this configuration, and its exact content should be confirmed against the unit label or the Bently Nevada modification record before a like-for-like replacement is ordered.

Technical Specifications