Bently Nevada 330194-11-21-15-00 Proximity Probe

330194-11-21-15-00 ETR Proximity Probe: Stop the Clock on Your Downtime

Every minute a turbine or compressor sits idle costs real money — production losses, penalty clauses, idle crews. The Bently Nevada 330194-11-21-15-00 Extended Temperature Range Proximity Probe is a direct drop-in replacement for your 3300 XL Proximitor® system, and we have units physically on the shelf in Xiamen right now. No lead-time guessing, no factory back-order runaround. You call, we ship — same day if your order lands before 15:00 CST.

This is not a refurbished unit dressed up with fresh labels. Every probe we dispatch carries full chain-of-custody documentation, original OEM packaging, and a serial number you can cross-reference. When your machinery protection system throws a probe fault at 02:00 on a Saturday, you need a supplier who picks up the phone and has the part in hand — that is exactly what siemensplc.com delivers.

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

Quick Technical Datasheet

Troubleshooting & Replacement Tips

After ten years of crawling around turbine decks and compressor bays, here is what actually goes wrong with the 330194-11-21-15-00 and what to watch when you swap it out:

Fault Code OK / Gap Voltage Out of Range (–10 V to –18 V window)
The most common call I get: the Proximitor® is reading a gap voltage outside the linear range. Before you condemn the probe, check the extension cable first — the 3300 XL system is a tuned RLC circuit and a corroded or kinked extension cable (330130 series) will throw the same fault. Swap the cable, re-gap, and re-read. If the voltage is still drifting, the probe coil is likely compromised — replace the 330194-11-21-15-00.

Replacement Gap Setting Procedure

• Power down the Proximitor® before disconnecting the probe. Hot-swapping induces a transient that can latch the 3500 rack into a trip state.
• Thread the new probe to the bracket. The 11 mm tip suffix means your target gap is 1.0 mm ± 0.1 mm (approximately –10.4 VDC at the Proximitor® output). Use a calibrated feeler gauge — do not eyeball it.
• Torque the locknut to 20 N·m. Under-torquing is the number-one cause of probe migration under vibration.
• After re-gapping, verify the static gap voltage at the Proximitor® OK relay terminals before re-enabling the trip circuit.
• Log the as-found and as-left gap voltages in your maintenance record. API 670 requires this for auditable machinery protection systems.

ETR vs. Standard Probe Confusion
The -11- suffix in the part number denotes the 11 mm tip, not the ETR rating. The ETR designation is embedded in the 330194 base number itself. Do not substitute a standard 330104 probe in an ETR application — the coil formulation is different and the Proximitor® calibration will be off by up to 8% across the temperature range. That error is invisible at ambient but becomes a nuisance trip at 150 °C bearing housing temperatures.

Common Fault Codes on 3500 Rack

• OK LED off, –24 V at probe terminals: Open circuit in probe or cable. Check cable continuity first.
• Intermittent OK relay chatter: Loose connector at the Proximitor® junction box. Re-torque the BNC or TNC connector to spec.
• Gap voltage stable but vibration reading noisy: Shaft surface finish degraded or target material changed. Verify target conductivity matches probe calibration.
• Proximitor® warm to touch, probe reading erratic: Proximitor® oscillator overloaded — check for cable length mismatch. The 330194-11-21-15-00 is calibrated for a 21 ft cable; adding extension beyond the rated total system length shifts the resonant frequency.

Reliability in Harsh Conditions

The 330194-11-21-15-00 was not designed for a climate-controlled instrument room. It lives inside bearing housings, steam turbine pedestals, and offshore compressor modules where ambient temperatures swing from sub-zero startups to 177 °C continuous operation. The ETR coil formulation maintains scale factor stability across that entire range — you get the same millivolts-per-mil output at –35 °C as you do at 150 °C, which matters when your protection setpoints are tight.

The 316 stainless steel housing handles the chemistry: hydrogen sulfide, lube oil mist, steam condensate, and the occasional wash-down with alkaline cleaner. The cable jacket is rated for continuous immersion in oil and resists the UV degradation that destroys standard PVC jackets on outdoor installations within two years. Vibration endurance exceeds 20 g RMS across 10–2000 Hz — the probe will outlast the bearing it is monitoring in most applications.

We store our inventory in a temperature and humidity-controlled warehouse. Every unit ships in the original OEM anti-static bag inside a rigid foam-lined carton. By the time it reaches your site, it is in the same condition it left the factory.

Global Express Logistics

Our dispatch hub is in Xiamen, China — one of the best-connected export ports on the Pacific Rim. Here is exactly how your order moves:

• Order confirmed before 15:00 CST: Same-day pick, pack, and handover to DHL Express or FedEx International Priority.
• DHL Express transit times: Southeast Asia 1–2 days | Middle East 2–3 days | Europe 3–4 days | North America 3–5 days.
• FedEx International Priority: Available as an alternative for destinations where FedEx has a service advantage (e.g., certain US industrial hubs).
• Documentation package included: Commercial invoice, packing list, country-of-origin certificate, and MSDS where required by customs. We pre-fill HS Code 9031.80 for proximity sensors to avoid customs query delays.
• Tracking: AWB number sent within 2 hours of handover. We monitor shipments proactively — if a customs hold occurs, we contact you before you contact us.
• Bulk orders: For quantities above 5 units or combined shipments, we can consolidate and ship via air freight on a nominated forwarder account to reduce per-unit cost.

We have shipped to refineries in Saudi Arabia, power plants in Germany, LNG terminals in Australia, and paper mills in Canada. The paperwork is never the bottleneck on our end.

Contact Information

Ready to order or need a compatibility check before you commit?

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

© 2026 siemensplc.com. All rights reserved.