- Model: 3500/40 Proximitor Monitor
- Part Number: 125672-01
- Channels: 4 independent channels
- Input Signals: Accepts signals from proximity transducers
- Measurement Types: Radial Vibration, Thrust Position, Eccentricity, Differential Expansion, REBAM®
- Signal Accuracy: Static: ±0.1% of full-scale / Dynamic: ±0.33% of full-scale
- Input Impedance: 10 kΩ
- Power Consumption: 7.0 Watts typical
- Alarming: Programmable Alert and Danger setpoints for each channel
- Operating Temp: -30°C to +65°C (-22°F to +149°F)
- Storage Temp: -40°C to +85°C (-40°F to +185°F)
- Standards: API 670 compliant; CE, CSA, and ATEX/IECEx certified
Compatible Parts & Accessories
| 3500/45 140072-04 |
330703-000-040-10-11-00 |
| 330130-045-01-00 |
330705-02-18-10-02-00 |
| 330130-080-00-05 |
330703-000-070-10-02-00 |
| 990-04-70-02-00 |
330101-10-27-05-02-05 |
| 330104-15-23-10-02-00 |
330878-50-00 |
| 330104-19-25-10-11-05 |
330103-00-12-10-01-00 |
| 330103-00-05-10-02-05 |
330103-00-16-10-01-00 |
| 330103-00-18-05-02-05 |
RS901104-03-050-10-01 R200602-400808 |
| 330130-045-02-05 |
330105-02-12-50-02-00 |
| 330101-00-08-05-02-05 |
350500-00-00-00-11-00 |
| 330130-085-00-05 |
330190-080-01-00 |
| 125388-01 |
3500/77M 140734-07 |
| 128275-01/128275-01F 130944-01 |
2201/03-01 |
| 330780-91-00 |
1900/65 |
| 330103-00-14-10-01-00 |
21747-080-00 |
| 330730-080-02-00 |
330730-080-01-00 |
| 330104-05-13-10-02-00 |
330930-060-00-00 |
| 3500/23E |
125388-01H 125388-01 |
| 3500/15E |
125720-02 |
| 136711-01 |
138708-01 |
Frequently Asked Questions
Q1: What kind of monitoring functions does the 3500/40 125672-01 actually cover?
The 3500/40 125672-01, basically a 4 Channel Proximitor Monitoring Module, is used in rotating machinery setups where you need continuous protection rather than occasional checks. In real use, it usually handles things like radial vibration, thrust position, shaft eccentricity, and sometimes differential expansion depending on the system setup. If the application includes rolling bearings, it can also work with REBAM® (Rolling Element Bearing Analysis Module), which is mainly for deeper bearing condition insight.
Q2: Is 3500/40 125672-01 really compliant with API 670?
A: Yes, it’s built around the API 670 Mechanical Protection System Standard, which is kind of the baseline requirement in a lot of oil & gas or power plant projects. Not just a label thing—it’s actually meant to fit into proper machinery protection loops, and in many cases it sits inside systems tied to ESD or shutdown logic. So it’s normally selected for critical machines, not general monitoring.
Q3: How many channels are there, and can each one be set differently?
A: You get 4 independent channels in one module. And yes, each channel can be set separately, which is usually the reason people choose this model. Through the 3500 Rack Configuration Software, you can assign different measurement types per channel. In practice, one module might monitor vibration on one axis, while another channel handles position or eccentricity—depends how the machine is built.
Q4: What about accuracy? Is 3500/40 125672-01 stable enough for protection use?
A: For normal industrial use, it’s considered stable. Static measurements like thrust position are usually around ±0.1%, while vibration signals are roughly in the ±0.33% range. Not laboratory-level precision, but for machinery protection systems, it’s more than enough and proven in long-term operation.
Q5:Can 3500/40 125672-01 survive harsh environments?
Pretty much yes. It’s designed for field conditions, so temperature range is about -30°C to +65°C, and humidity can go up to 95% non-condensing. You’ll see it running in refineries, offshore platforms, power stations—places where conditions are not exactly friendly.
Q6:Can 3500/40 125672-01 connect with other software or diagnostic systems?
A: Usually yes. It works directly with Bently Nevada System 1 software, which is common for condition monitoring. On top of that, buffered outputs are available, so external vibration or analysis systems can pick up the signals too. In real projects, engineers often use it both for protection logic and deeper offline or online diagnostics.