Bently Nevada 330850-51-CN 3300 XL 25 mm Proximitor Sensor
| Feature | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Product Series | 3300 XL 25 mm Proximitor Sensor |
| Part Number | 330850-51-CN |
| System Length | 5.0 Metres (16.4 feet) |
| Mounting Option | 35 mm DIN rail mount |
| Agency Approval | CN: NEPSI (China Hazardous Area Certification) |
| Sensor Type | Non-contacting Eddy Current |
| Input Voltage | -17.5 Vdc to -26 Vdc |
| Output Type | Analog Displacement Signal |
| Linear Range | 1.27 to 10.16 mm (50 to 400 mils) |
| Operating Temperature | -35°C to +85°C (-31°F to +185°F) |
| Housing Material | A380 Aluminum |
| Connector Type | Gold-plated Brass ClickLoc™ |
We’re already shipping to more than 150 countries now. So whether it’s a power plant somewhere in Europe or a production line down in Southeast Asia, the idea is pretty simple—parts get there fast, usually before small issues have a chance to turn into something bigger. Logistics isn’t perfect anywhere, but we’ve tried to make it solid enough that you’re not sitting around waiting when something actually matters.
Honestly, we just want you to feel like you’re buying straight from the manufacturer—no extra layers, no guesswork, just that same level of confidence when you place an order with us.
The whole industry is shifting fast right now, “smart factories” everywhere, new systems popping up all the time. But at the same time, a lot of the older setups are still running strong and not going away anytime soon. So we’re kind of sitting in the middle of that—helping you keep the current machines alive and stable, while you slowly figure out what comes next.
We’ve definitely grown over the years, sure. More reach, more countries, more volume. But day to day, it’s still the same idea for us—keep things running, keep the downtime down, make sure the lights stay on and the lines don’t stop.

- Differential Expansion (DE): This is its most critical role. It measures the relative axial displacement between a machine's rotor and its casing (stator). This is usually the most sensitive phase. The rotor and casing heat up at different rates, so they expand unevenly. Things can drift pretty quickly if you’re not watching closely.
- Axial Position (Thrust): Basically tracking where the rotor sits inside the thrust bearing. If it moves out of range, you risk metal-to-metal contact, which is about as bad as it gets in these machines.
- Radial Vibration: Common on machines with fluid-film bearings. It’s used to check shaft vibration and get an overall sense of mechanical health. A lot of early warning signs show up here first.
- Power Generation: Widely used in steam turbine generator (STG) sets. The 12.7 mm (500 mil) measurement range is designed specifically to handle the larger rotor movements in these systems.
- Oil & Gas / Petrochemical: Mainly for centrifugal compressors and heavy-duty pumps running in continuous service. The “-CN” version meets NEPSI / CNEX hazardous area certification, so it’s suitable for explosive environments.
- Industrial drive systems: Used in large motors and gearboxes that support critical infrastructure—simple setups on the surface, but absolutely essential when they stop.
| 330904-05-14-05-02-00 | 3300/20 |
| 330930-040-00-00 | 990-04-50-02-00 |
| 330909-00-60-10-02-05 | 81545-01 |
| 21000-16-10-15-057-03-02 | 82926-01 |
| 21000-16-10-15-102-03-02 | 84140-01 |
| 21000-16-10-15-114-03-02 | 84145-01 |
| 21000-16-10-15-144-03-02 | 84152-01 |
| 991-01-XX-01-CN | 330103-00-04-10-02-05 |
| 3500/93 135799-02 | 330730-040-03-00 |
| 22810-00-10-10-02 | 330104-00-25-10-02-05 |
| 330193-00-05-10-00 | 330103-00-07-20-02-00 |
| 330103-02-12-05-02-CN | 126599-01 |
| 330103-06-13-05-02-CN | 990-04-70-01-00 |
| 330104-00-04-10-02-CN | 330103-00-15-05-01-00 |
| 990-05-XX-01-CN | 330905-00-10-10-02-00 |
| 330101-30-63-15-02-CN | 991-06-50-01-00 |
| 330104-00-04-50-11-00 | 330103-00-15-10-02-00 |
| 330104-00-12-10-02-00 | 1X35668 |
| 330104-00-15-10-02-00 | 330103-02-07-10-02-00 |
| 3300/05 | 330103-02-12-10-02-00 |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.