Bently Nevada 330103-00-11-50-02-00 Proximity Probe

330103-00-11-50-02-00 In Stock — Every Hour of Downtime Costs More Than This Probe

Your turbine tripped at 02:00. The DCS is throwing Probe Gap Voltage alarms. Maintenance pulled the 8mm probe and confirmed it’s dead — cable shorted, tip corroded, signal flatlined. The OEM says 6–8 weeks. Your production manager is already calculating losses per hour. This is exactly the scenario the Bently Nevada 330103-00-11-50-02-00 was built to resolve — and it’s exactly why we stock it in Xiamen, ready to move today.

The 330103-00-11-50-02-00 is the 8mm eddy-current proximity probe at the heart of Bently Nevada’s 3300 XL measurement chain. It delivers non-contact, continuous shaft vibration and radial position data to your 3500 Series rack — the last line of defense before a bearing failure becomes a rotor wreck. When this probe fails, nothing downstream matters. Get it replaced fast, get it right, and get your machine back online.

URGENT REQUIREMENT? Contact: [email protected] | WhatsApp: +86 18359268345

Quick Technical Datasheet

Troubleshooting & Replacement Tips

Most common failure modes for the 330103-00-11-50-02-00:

• Gap voltage out of range (Bently Nevada 3500 rack alarm): The 3300 XL system expects a gap voltage between –10 VDC and –18 VDC at nominal installation gap. If your rack is showing a gap voltage outside this window — typically –24 VDC (probe too close or shorted) or 0 VDC (open circuit) — the probe or extension cable is the first suspect. Disconnect the extension cable at the proximitor and measure resistance across the probe tip to the outer conductor. A healthy 8mm probe reads approximately 8–12 Ω. Anything outside that range: replace the probe.
• Intermittent vibration spikes / noise floor elevated: Often caused by micro-fractures in the probe cable jacket near the tip, especially in high-vibration installations. The eddy-current signal is highly sensitive to cable impedance changes. If vibration readings are erratic but gap voltage is nominal, flex the cable near the probe body while monitoring the proximitor output. Movement-correlated noise = cable/probe assembly failure.
• Probe reads correctly at bench, fails in situ: Thermal expansion of the bearing housing can shift the probe gap beyond the linear range. Verify installation gap at operating temperature, not just cold. The 8mm probe linear range is approximately 0.25–2.54 mm — if your cold-set gap is at the edge of this range, thermal growth will push it out.

Replacement procedure — field checklist:

1. De-energize the proximitor supply (–24 VDC) before disconnecting the probe. Hot-swapping can damage the proximitor input stage.
2. Record the existing probe gap (use a feeler gauge or the gap voltage reading before removal). Target reinstallation gap: 1.0–1.27 mm (40–50 mil) for most 3300 XL 8mm installations — confirm against your machine’s original commissioning records.
3. Remove the locknut and back the probe out carefully. Note thread engagement depth for reference.
4. Install the new 330103-00-11-50-02-00. Thread in until tip contacts the shaft, then back out to the target gap. Tighten locknut — do not over-torque (typically 20–25 Nm depending on bracket material).
5. Reconnect extension cable. Power up the proximitor. Verify gap voltage is within –10 to –18 VDC. Fine-adjust probe position if needed.
6. Check the 3500 rack for cleared alarms. Run a slow-roll check to confirm vibration baseline is clean before returning the machine to service.
7. No calibration required — the 3300 XL system is factory-calibrated as a matched set. Replacing the probe with a genuine 330103-00-11-50-02-00 and using the existing matched extension cable and proximitor restores the original calibration without field adjustment.

Common 3500 rack fault codes related to this probe:

• OK Relay de-energized / Not OK status: Gap voltage outside configured OK limits — check probe gap first.
• Alert / Danger setpoint trip on radial vibration: If the machine is mechanically healthy, verify probe gap and cable integrity before assuming a process issue.
• Transducer Not OK (TNK): Proximitor is detecting an open or shorted probe circuit — probe or cable replacement required.

Reliability in Harsh Conditions

The 330103-00-11-50-02-00 is not a lab instrument. It lives inside bearing housings, exposed to oil mist, process gas leaks, condensation, and the constant mechanical stress of a machine running at 3,000–12,000 RPM. Bently Nevada engineered the 3300 XL probe body from 316 stainless steel — corrosion-resistant, non-magnetic, and dimensionally stable across the full operating temperature range of –35°C to +177°C.

The cable jacket is rated for continuous immersion in turbine oil and resistant to the aromatic hydrocarbons common in gas turbine and compressor environments. The coaxial cable construction maintains consistent impedance under mechanical flexing — critical because any impedance variation in the probe-to-proximitor circuit directly corrupts the vibration measurement.

In offshore and coastal installations where salt-laden air accelerates corrosion, the stainless housing and sealed connector interface provide meaningful protection compared to carbon steel alternatives. We have supplied this probe to operators in the Middle East, Southeast Asia, and South America where ambient temperatures exceed 50°C and humidity is near-constant — the 3300 XL design handles it without derating.

Vibration endurance: the probe body and cable assembly are qualified to withstand the vibration levels generated by the machinery they monitor — a design requirement that sounds obvious but is frequently overlooked with counterfeit or non-OEM substitutes. A probe that fails due to its own resonance in a high-vibration environment is worse than no probe at all.

Global Express Logistics

We operate from Xiamen, China — a major international port city with direct DHL, FedEx, and UPS hub access. For in-stock items like the 330103-00-11-50-02-00, our standard process is:

• Order confirmed before 15:00 CST: Same-day dispatch to DHL/FedEx hub.
• DHL Express Worldwide: 2–4 business days to most of Europe, Middle East, and Southeast Asia. 3–5 business days to the Americas.
• FedEx International Priority: Available as an alternative carrier — same transit time bracket.
• Export documentation: Commercial invoice, packing list, and certificate of origin prepared same day. For ATEX-certified parts, we include the relevant conformity documentation.
• Customs HS Code: 8543.70 (electronic instruments for measuring) — we pre-fill all export paperwork to minimize customs clearance delays at destination.
• Tracking: AWB number provided within 2 hours of dispatch. Real-time tracking link sent directly to your procurement contact.
• Emergency freight: For critical shutdowns, we can arrange next-flight-out courier on request. Contact us directly for this service.

We have shipped Bently Nevada components to refineries in Saudi Arabia, power plants in Vietnam, compressor stations in Kazakhstan, and offshore platforms in the North Sea. The logistics process is the same every time: fast, documented, and traceable.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
© 2026 siemensplc.com. All rights reserved.