Choosing the right monitor depends on what the machine needs: proximity probes measure shaft relative motion on sleeve-bearing machines, while seismic (velocity/acceleration) inputs suit rolling-element bearings and casings. Use the table below to match the measurement to the module.
| Module | Typical Part No. | Measurement type | Typical application |
|---|---|---|---|
| 3500/40M | 143488-01 | Proximity — radial vibration, axial position, eccentricity, differential expansion | Steam and gas turbines, centrifugal compressors |
| 3500/42M | 143489-01 | Proximity / seismic — acceleration, velocity, shaft absolute | Pumps, motors, fans, gearboxes |
| 3500/44M | 143490-01 | Aeroderivative gas turbine vibration | Aeroderivative GT packages |
| 3500/45 | 135545-01 | Axial position, differential expansion, case expansion, valve position | Steam turbines |
| 3500/46M | — | Hydro-specific monitoring | Hydro turbines and generators |
| Module | Typical Part No. | Function | Typical application |
|---|---|---|---|
| 3500/25 | 129770-01 | Enhanced Keyphasor — phase reference and speed | Any machine needing 1X / 2X phase data |
| 3500/50M | 134938-01 | Tachometer — speed and zero speed | Speed measurement, zero-speed indication |
| 3500/53 | 134939-01 | Electronic overspeed detection | Turbine overspeed protection |
| Module | Typical Part No. | Function | Typical application |
|---|---|---|---|
| 3500/70M | — | Reciprocating compressor monitor | Recip compressors |
| 3500/72M | — | Rod position and rod drop | Recip compressors |
| 3500/77M | — | Cylinder pressure | Recip compressors |
| 3500/64M | — | Dynamic pressure | Combustion and pulsation monitoring |
| Item | Typical Part No. | Used with | Notes |
|---|---|---|---|
| 3500/40 I/O module | 135489-04 | 3500/40M | Field wiring termination |
| 3500/42 I/O module | 135489-01 | 3500/42M | Standard I/O |
| 3500/42 I/O module | 135489-02 | 3500/42M | Four-channel version |
| 3300 XL 8 mm probe | 330101-00-20-90-12-05 | Proximitor sensor system | See product page for full ordering code |
| 3300 XL extension cable | 330180-91-05 | Proximitor sensor system | See product page for full ordering code |
Part number not listed, or looking for a discontinued module? Send us the model number — we source Bently Nevada 3500 spares including long-lead and obsolete items.
Part numbers shown are typical ordering references taken from publicly available Bently Nevada documentation and are given for identification only. Availability is confirmed at quotation.
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