Bently Nevada 330194-10-20-05-00 – Extended Temperature Range (ETR) Proximity Probe | 3300 XL Series
Engineering Background
The Bently Nevada 330194-10-20-05-00 is an Extended Temperature Range (ETR) proximity probe engineered for continuous, non-contact vibration and position measurement in the most thermally demanding turbomachinery environments. Built on the proven 3300 XL eddy-current platform, this probe delivers measurement fidelity where standard probes fail — from cryogenic cold to high-temperature steam-path installations.
Product Positioning
Designed for procurement engineers specifying condition-monitoring instrumentation on gas turbines, steam turbines, compressors, and large rotating machinery, the 330194-10-20-05-00 is the OEM-specified solution for shaft radial vibration, axial position, and differential expansion measurement in API 670-compliant protection systems.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 330194-10-20-05-00 |
| Series / Platform | Bently Nevada 3300 XL |
| Probe Type | Eddy-Current (Non-Contact) Proximity Probe |
| Variant | Extended Temperature Range (ETR) |
| Probe Length | 10 in (254 mm) |
| Cable Length | 20 ft (6.1 m) integral cable |
| Tip Diameter | 5 mm (0.197 in) |
| Thread Size | M10 × 1 (standard) |
| Connector | 5-pin DIN (standard Bently Nevada) |
| Operating Temperature | –50 °C to +177 °C (ETR rated) |
| Sensitivity | 200 mV/mil (7.87 V/mm) nominal |
| Linear Range | 0 to 90 mil (0 to 2.29 mm) |
| Frequency Response | DC to 10,000 Hz (–3 dB) |
| Supply Voltage | –24 VDC (via Proximitor® driver) |
| Target Material | AISI 4140 steel (standard); consult factory for other alloys |
| Housing Material | 316 stainless steel |
| IP Rating | IP67 |
| Weight | Approx. 400 g (probe + cable assembly) |
| Compliance | API 670 (4th & 5th Edition), CE, RoHS |
| Compatible Driver | Bently Nevada 3300 XL Proximitor® (e.g., 330180, 330181) |
Proven Application Environments
- Gas Turbines — Radial shaft vibration monitoring at compressor and turbine ends; high-temperature bearing housings up to 177 °C
- Steam Turbines — Axial position and differential expansion measurement in high-pressure steam paths
- Centrifugal Compressors — Continuous shaft orbit and eccentricity monitoring per API 670
- Cryogenic Pumps & Expanders — ETR rating supports sub-zero installations down to –50 °C
- Large Rotating Machinery — Generators, fans, and gearboxes requiring non-contact position feedback
- Petrochemical & Refinery Plants — Hazardous-area installations with IP67 environmental sealing
Engineering Advantages
- Extended Temperature Range — Certified –50 °C to +177 °C; eliminates probe replacement in thermally cycled installations
- Non-Contact Measurement — Zero mechanical wear; continuous operation without maintenance intervals
- High Frequency Response — DC to 10 kHz bandwidth captures sub-synchronous, synchronous, and super-synchronous vibration components
- API 670 Compliance — Drop-in replacement for existing 3300 XL installations; no recalibration of Proximitor® required
- 316 SS Housing — Corrosion-resistant in H₂S, steam, and process-fluid environments
- IP67 Sealing — Suitable for wash-down and outdoor installations
- Long Integral Cable — 20 ft (6.1 m) factory-terminated cable reduces field splicing and signal integrity risk
System Architecture & Signal Flow
The 330194-10-20-05-00 operates as part of the Bently Nevada 3300 XL eddy-current measurement chain:
- Probe Tip — Generates a high-frequency electromagnetic field (oscillator frequency ~1 MHz) directed at the rotating shaft target
- Eddy-Current Induction — Shaft proximity modulates field impedance; gap change of 1 mil produces ~200 mV output change
- Integral Cable — Coaxial, factory-terminated, 20 ft; transmits raw oscillator signal to Proximitor®
- Proximitor® Driver (e.g., 330180) — Demodulates signal; outputs –24 VDC to 0 VDC proportional DC voltage and buffered AC vibration signal
- Monitoring System — 3500 Series rack or equivalent processes signals for alarm, trip, and data acquisition
Note: Total cable length (probe integral cable + extension cable) must not exceed the system-calibrated length. Consult Bently Nevada System 1® calibration data for your specific installation.
Sourcing & Quality Verification
- All units sourced through authorized Bently Nevada / Baker Hughes distribution channels or verified surplus with full traceability documentation
- Each unit inspected for: physical integrity, connector condition, cable jacket continuity, and part-number label authenticity
- Certificate of Conformance (CoC) and original packaging available upon request
- Serialization and date-code records maintained for full supply-chain traceability
- Counterfeit-mitigation protocol: visual inspection + impedance verification against OEM reference data
Procurement Process
- Confirm Compatibility — Verify your Proximitor® model and total cable length against your system calibration sheet
- Request Quote — Contact [email protected] for volume pricing, lead time, and CoC documentation
- Place Order — Add to cart or submit PO; we accept T/T, L/C, and major credit cards
- Shipping — DHL / FedEx express worldwide; export documentation (commercial invoice, packing list, HS code 9031.80) included
- After-Sales Support — Technical assistance available for installation, calibration verification, and system integration
Technical FAQ
- Q: Can the 330194-10-20-05-00 replace a standard (non-ETR) 330104 probe?
- A: Yes, provided the Proximitor® is calibrated for the 330194 probe series. ETR probes use the same sensitivity (200 mV/mil) but require ETR-compatible calibration data. Verify with your System 1® calibration file.
- Q: What is the maximum operating temperature?
- A: The ETR variant is rated to +177 °C (350 °F) at the probe tip. Standard 3300 XL probes are rated to +121 °C — the ETR designation specifically addresses this gap.
- Q: Is the probe intrinsically safe / ATEX certified?
- A: Intrinsic safety is a system-level certification dependent on the Proximitor® driver and associated barriers. Consult the Bently Nevada 3300 XL system documentation and your local hazardous-area authority for ATEX/IECEx compliance confirmation.
- Q: What target materials are compatible?
- A: AISI 4140 steel is the standard calibration target. Other ferromagnetic and non-ferromagnetic alloys (e.g., Inconel, titanium) require recalibration. Contact Konmask for application-specific guidance.
- Q: Do you provide installation and commissioning support?
- A: Yes. Our engineering team provides remote technical support for probe installation, gap setting (nominal 50 mil / 1.27 mm), and Proximitor® output verification. Contact [email protected].
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