Bently Nevada 330195-02-12-10-00 – Extended Temperature Range (ETR) Reverse Mount Proximity Probe | 3300 XL Series
Engineering Background
The Bently Nevada 3300 XL proximity probe system is the global benchmark for continuous shaft vibration and position monitoring in rotating machinery. Deployed across power generation, oil & gas, petrochemical, and heavy industrial sectors, the 3300 XL platform delivers the measurement accuracy and reliability demanded by API 670 machinery protection standards. The 330195 series represents the Extended Temperature Range (ETR) variant, engineered for environments where standard probes cannot maintain calibration integrity.
Product Positioning
The 330195-02-12-10-00 is a reverse-mount ETR proximity probe designed for installations where the probe must be inserted from the non-drive end or where cable routing constraints require a reversed connector orientation. It integrates directly with Bently Nevada 3300 XL extension cables and proximitors, maintaining full system calibration across an extended ambient temperature envelope. This part is the preferred specification for turbine bearing housings, compressor trains, and pump sets operating in high-temperature or cryogenic process environments.
Complete Technical Specifications
| Part Number | 330195-02-12-10-00 |
| Brand / OEM | Bently Nevada (Baker Hughes) |
| Series / Platform | 3300 XL Proximity Transducer System |
| Probe Type | Eddy-Current Proximity Probe, Reverse Mount (ETR) |
| Probe Tip Diameter | 8 mm (nominal) |
| Cable Length | 0.5 m integral cable (02 = 2 ft) |
| Thread Size | M10 × 1.0 (metric) |
| Linear Range | 0.25 mm – 2.54 mm (10 – 100 mil) |
| Scale Factor | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Operating Temperature | –50 °C to +177 °C (ETR rated) |
| Target Material | AISI 4140 steel (standard); other alloys per calibration chart |
| Supply Voltage | –24 VDC (via proximitor/driver) |
| Output Voltage Range | –2 VDC to –18 VDC |
| Connector Type | Reverse-mount integral coaxial connector |
| Housing Material | 316 Stainless Steel |
| IP Rating | IP67 (probe body) |
| Compliance | API 670, CE, RoHS |
| Weight | Approx. 40 g |
| Compatible Proximitors | 3300 XL 8mm, 3300 RAM, 3300/16 Series |
Proven Application Environments
- Steam & Gas Turbines – Bearing journal vibration and axial position monitoring at elevated casing temperatures
- Centrifugal Compressors – Radial vibration measurement on high-speed impeller shafts in hydrocarbon service
- Boiler Feed Pumps – Continuous shaft displacement monitoring in high-temperature feedwater systems
- Cryogenic Expanders – Stable calibration maintained at sub-zero process temperatures (ETR lower limit –50 °C)
- Gearboxes & Fans – Reverse-mount geometry accommodates restricted probe access in compact bearing housings
- LNG / Refinery Trains – Certified for use in hazardous area installations when paired with appropriate barriers
Engineering Advantages
- Extended Temperature Stability – ETR calibration maintains ±1% scale factor accuracy across the full –50 °C to +177 °C range, eliminating thermal drift errors that compromise standard probes above 120 °C
- Reverse-Mount Geometry – Integral connector exits from the probe tip side, enabling installation in housings where conventional cable routing is obstructed
- 316 SS Construction – Corrosion-resistant body withstands process fluid splash, steam condensate, and aggressive industrial atmospheres
- Direct System Compatibility – Plug-and-play replacement within existing 3300 XL infrastructure; no recalibration of the proximitor required when replacing like-for-like
- API 670 Compliance – Meets the mandatory machinery protection standard for critical rotating equipment in oil & gas and power generation
- Broad Target Compatibility – Calibration charts available for 4140 steel, 17-4 PH, Inconel 718, and other common shaft alloys
System Architecture & Signal Flow
The 330195-02-12-10-00 operates as the sensing element in a three-component eddy-current measurement chain:
- Probe (330195-02-12-10-00) – Generates a high-frequency electromagnetic field at the probe tip; field perturbation by the conductive target shaft produces an impedance change proportional to gap distance.
- Extension Cable (3300 XL series) – Transmits the RF signal from the probe to the proximitor with controlled impedance; total probe + cable length must match the proximitor calibration.
- Proximitor / Driver (3300 XL 8mm) – Demodulates the RF signal and outputs a DC voltage (–2 V to –18 V) linearly proportional to shaft gap; this signal feeds directly into the 3500 Series rack monitor or equivalent DCS/PLC input card.
Signal output is compatible with Bently Nevada 3500 Series monitors, GE Mark VI/VIe turbine control systems, Emerson DeltaV, Honeywell Experion, and any 4–20 mA or ±10 V analog input module via appropriate signal conditioning.
Sourcing & Quality Verification
- Origin – Genuine Bently Nevada (Baker Hughes) manufactured component; sourced through authorized industrial distribution channels
- Inspection – Each unit undergoes dimensional verification, connector integrity check, and coil continuity test prior to dispatch
- Traceability – Part number, date code, and serial number verified against OEM labeling standards
- Packaging – Anti-static foam insert, moisture-barrier bag, and rigid outer carton; probe tip protected by factory cap
- Warranty – 12-month operational warranty against manufacturing defects; DOA replacement within 7 business days
Procurement Process
- Confirm Compatibility – Verify your existing proximitor model and total cable length against the 3300 XL calibration matrix before ordering
- Request a Quote – Contact [email protected] for volume pricing, lead time confirmation, and export documentation
- Place Order – Add to cart and complete checkout; wire transfer, PayPal, and major credit cards accepted
- Shipping – DHL Express / FedEx International Priority; typical transit 3–7 business days worldwide; tracking provided within 24 hours of dispatch
- Documentation – Commercial invoice, packing list, and certificate of conformance included; ECCN / HTS classification available on request
Technical FAQ
Q: Can this probe replace a standard (non-ETR) 330195 unit in an existing installation?
A: Yes. The ETR variant is dimensionally and electrically identical to the standard version and is a direct drop-in replacement. The ETR rating is additive — it does not alter scale factor or output range within the standard temperature envelope.
Q: What is the maximum shaft speed this probe can accurately measure?
A: The –3 dB frequency response of DC – 10,000 Hz supports accurate vibration measurement on shafts rotating up to approximately 600,000 RPM for 1× vibration components, well beyond the range of any industrial rotating machine.
Q: Does the reverse-mount configuration affect calibration?
A: No. The calibration (scale factor and linear range) is determined by the probe tip geometry and coil design, not the connector orientation. The reverse-mount designation refers solely to the cable exit direction.
Q: Which extension cable part numbers are compatible?
A: Standard 3300 XL extension cables (330130 series) are compatible. Total system cable length (probe integral cable + extension) must equal the proximitor’s rated input length — typically 5 m or 9 m. Confirm with your proximitor datasheet.
Q: Is this part available with ATEX / IECEx certification for Zone 1 hazardous areas?
A: The probe itself is passive and intrinsically safe when used with a certified Zener barrier or galvanic isolator. Contact us for the applicable barrier part numbers and installation drawing references.
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