Bently Nevada 330104-00-03-90-02-00 Proximity Probe

330104-00-03-90-02-00 — Stop the Clock on Your Downtime

Every minute a turbine or compressor sits idle, you’re bleeding money. The Bently Nevada 330104-00-03-90-02-00 — an 8mm eddy-current proximity probe from the field-proven 3300 XL Series — is one of the most frequently swapped components in rotating machinery protection systems. When it fails, your entire API 670 monitoring loop goes dark. We stock it. We ship it fast. That’s the only conversation that matters right now.

This probe handles continuous, non-contact measurement of shaft radial vibration, axial position, and differential expansion across steam turbines, centrifugal compressors, boiler feed pumps, and large induction motors. It pairs exclusively with the Bently Nevada 3300 XL Proximitor and the 3500 series monitors. If your DCS is throwing a Not OK or your System 1 dashboard is flagging a probe fault, this is the part you need — and we have it on the shelf in Xiamen, ready to move today.

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

Quick Technical Datasheet

Troubleshooting & Replacement Tips

After ten years of field work, these are the failure modes and swap pitfalls that catch engineers off guard on the 330104-00-03-90-02-00:

1. Confirm the fault is the probe, not the extension cable or Proximitor. Before you pull the probe, disconnect the extension cable at the Proximitor and measure the probe’s DC resistance tip-to-shield. A healthy 8mm probe reads approximately 7–9 Ω. An open circuit or reading above 15 Ω points to a broken coil or damaged cable — the probe is dead. If resistance is normal, suspect the extension cable (330130 series) or the Proximitor itself.

2. Gap voltage is everything. After installing the replacement probe, set the air gap to 1.0 mm (40 mil) and verify the Proximitor output reads -10.0 VDC ±0.5 VDC. If you’re outside that window, the monitor will flag a Not OK regardless of how good the probe is. Use a non-ferrous feeler gauge — a steel gauge will corrupt the reading. Adjust the probe’s threaded body until you hit the target, then lock the jam nut to 20–25 N·m.

3. Target material matters more than people admit. The 330104 is calibrated against AISI 4140 steel. If your shaft is 316 stainless, Inconel 718, or titanium, the sensitivity shifts — sometimes by 15–20%. You’ll need to apply the Bently Nevada target material correction factor or request a custom-calibrated probe. Skipping this step causes false high-vibration trips.

4. Armored cable routing. The -90- suffix means stainless steel armored cable. Do not bend it tighter than a 50 mm radius. Overtightening conduit fittings on the armor can create micro-fractures in the inner coax that won’t show up on a resistance check but will generate noise at running speed. Route with gentle curves and secure every 300 mm.

5. Common fault codes to cross-reference:

• 3500 Monitor – Channel Not OK (CNO): Gap voltage out of range. Re-gap the probe first.
• System 1 – Probe Fault / Signal Loss: Check extension cable continuity and Proximitor supply voltage (-24 VDC ±1 VDC).
• High static reading at zero speed: Shaft runout or probe installed off-axis. Verify probe is perpendicular to shaft centerline within 1°.
• Intermittent 1× vibration spike: Loose jam nut allowing probe to micro-vibrate. Retorque and apply thread-locking compound (medium strength).

6. No firmware matching required for the probe itself — it is a passive sensor. However, if you are replacing a probe on a 3500/40M or 3500/42M monitor, verify the channel configuration in the 3500 Rack Configuration Software matches the probe type (8mm, 200 mV/mil) and that the OK limit setpoints have not drifted from the original commissioning values.

Reliability in Harsh Conditions

The 3300 XL probe series was not designed for a clean lab — it was built for the floor of a gas compression station in the Permian Basin or the turbine deck of an offshore FPSO. The 330104-00-03-90-02-00 reflects that pedigree.

The stainless steel armored cable (suffix -90-) provides mechanical protection against abrasion, rodent damage, and accidental impact from maintenance tools. The probe body is machined from corrosion-resistant stainless steel and sealed to IP67, meaning it survives direct water jets and temporary immersion — relevant in wet gas applications or outdoor installations exposed to monsoon conditions.

Vibration immunity is validated to IEC 60068-2-6: the probe withstands 10–2000 Hz swept sine at 20 g without signal degradation. In practice, this means it stays stable even when mounted on a compressor frame that transmits significant structure-borne vibration from adjacent machinery.

Thermal performance is equally robust. The probe tip is rated to +177 °C continuous, covering the bearing housing temperatures seen on high-pressure steam turbines. The cable insulation maintains dielectric integrity across the full range, preventing the leakage currents that cause spurious low-frequency noise in vibration signals.

Every unit we ship undergoes a pre-dispatch functional check: gap voltage verification at 1.0 mm, DC resistance measurement, and visual inspection of the connector and armor. Units that don’t pass don’t ship. You get a part that works the first time — because on a critical machine, there is no second chance.

Global Express Logistics

Our warehouse is located in Xiamen, Fujian, China — one of the most logistics-efficient export hubs on the mainland, with direct access to DHL, FedEx, and UPS international gateways at Xiamen Gaoqi International Airport.

Standard dispatch timeline: Orders confirmed before 14:00 CST ship same business day. Orders confirmed after 14:00 CST ship the following morning. No exceptions, no excuses — downtime doesn’t wait for paperwork.

Typical transit times (door-to-door):

• Southeast Asia (Singapore, Thailand, Malaysia): 2–3 business days via DHL Express
• Middle East (UAE, Saudi Arabia, Qatar): 3–4 business days via FedEx International Priority
• Europe (Germany, Netherlands, UK): 3–5 business days via DHL Express Worldwide
• North America (USA, Canada): 4–5 business days via FedEx International Priority
• Australia / New Zealand: 3–4 business days via DHL Express

All shipments include a commercial invoice, packing list, and certificate of conformance. For customers in regulated industries requiring additional documentation (material traceability, test reports, country of origin certificates), notify us at order placement and we will prepare the full package before dispatch.

Customs clearance: we declare goods accurately and provide HS code 8543.70 documentation. We do not under-declare values — this protects you from customs holds that would defeat the entire purpose of express shipping. If your facility has a preferred customs broker, send us their details and we will coordinate directly.

For orders exceeding 10 units or requiring air freight consolidation with other parts, contact us for a dedicated logistics quote. We regularly consolidate multi-line orders for plant shutdowns and turnarounds, shipping everything in a single airfreight consignment to reduce your total landed cost.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
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