Bently Nevada 3500/45-01-00 135137-01 Position Monitor

Overview of Bently Nevada™ 3500/45 Position Monitor

The Bently Nevada™ 3500/45 Position Monitor is a versatile 4-channel instrument engineered to 

accept inputs from a wide range of sensing devices, including proximity transducers, Rotary Position 

Transducers (RPTs), DC Linear Variable Differential Transformers (DC LVDTs), AC Linear Variable 

Differential Transformers (AC LVDTs), and rotary potentiometers. It conditions incoming signals with 

high precision and automatically compares the processed data against user-programmable alarm 

thresholds, delivering reliable monitoring and critical status notifications for industrial machinery 

position-related parameters.

Overview of 3500/45-01-00 135137-01

The Bently Nevada™ 3500/45-01-00 (part number 135137-01) is a high-performance 4-channel 

position monitor equipped with an internal termination Position I/O Module, designed to accept 

inputs from proximity transducers, Rotary Position Transducers (RPTs), and DC Linear Variable 

Differential Transformers (DC LVDTs) for precision industrial machinery position monitoring. As a core 

component of the 3500 protection and condition monitoring system, it supports versatile 

measurement functions—including axial (thrust) position, differential expansion, case expansion, and 

valve position—with channels programmable in pairs to perform up to two functions simultaneously. 

The monitor conditions input signals with exceptional accuracy (typically ±0.33% of full-scale for 

thrust and differential expansion) and compares processed data against user-programmable alert and 

danger alarm setpoints, delivering critical machinery protection and operational insights. It features 

front-panel status LEDs (OK, TX/RX, Bypass) for real-time system visibility, provides proportional 4-20 

mA and 0-12 Vdc recorder outputs, and offers robust environmental resilience (-30°C to +65°C 

operating temperature, 95% non-condensing humidity). Compliant with global standards (EMC, LV, 

RoHS) and hazardous area certifications (cNRTLus, ATEX/IECEx for Zone 2/Division 2), this module 

integrates seamlessly into 3500 racks, requiring 1 full-height front slot and 1 rear slot for the I/O 

module, making it ideal for oil and gas, power generation, and manufacturing applications 

demanding reliable machine health monitoring.