Bently Nevada 330703-000-050-10-11-00 – High-Precision Eddy Current Proximity Probe | 3300 XL Series Platform
Engineering Background
The Bently Nevada 3300 XL Series represents the industry benchmark for non-contact vibration and position measurement in rotating machinery. Developed under Baker Hughes’ Condition Monitoring portfolio, the 3300 XL proximity probe system is engineered to deliver sub-micron resolution in the harshest industrial environments — from petrochemical compressors to power generation turbines. The 330703 probe series is the field-proven workhorse of this platform, trusted by maintenance engineers across six continents.
Product Positioning
The 330703-000-050-10-11-00 is a 5mm eddy current proximity probe with a 1-metre (50 cm extension) armored cable, designed for direct integration with Bently Nevada 3300 XL signal conditioning systems. It is the preferred choice for shaft radial vibration, axial position, and differential expansion measurements on API 670-compliant machinery protection systems. Procurement engineers sourcing replacement or expansion probes for existing 3300 XL installations will find this part a direct, drop-in compatible solution.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 330703-000-050-10-11-00 |
| Series / Platform | Bently Nevada 3300 XL |
| Sensor Type | Eddy Current Proximity Probe (Non-contact) |
| Probe Tip Diameter | 5 mm |
| Cable Length | 0.5 m (500 mm) integral armored cable |
| Measurement Range | 0 – 2.54 mm (0 – 100 mil) |
| Scale Factor (Sensitivity) | 7.87 V/mm (200 mV/mil) nominal |
| Frequency Response | DC – 10,000 Hz (–3 dB) |
| Operating Temperature | –35 °C to +177 °C (–31 °F to +351 °F) |
| Supply Voltage | –24 VDC (via Proximitor® driver) |
| Output Voltage Range | –2 VDC to –18 VDC |
| Target Material | AISI 4140 steel (standard); consult factory for non-ferrous |
| Connector Type | Integral coaxial, mates with 330130 / 330180 extension cable |
| Housing Material | 316 Stainless Steel |
| Ingress Protection | IP67 (probe body) |
| Compliance | API 670 5th Edition; CE; RoHS |
| Weight | Approx. 140 g |
| Country of Origin | United States |
Proven Application Environments
- Oil & Gas: Centrifugal compressors, gas turbines, pipeline pumping stations — shaft radial vibration per API 670
- Power Generation: Steam turbine axial position and differential expansion monitoring
- Petrochemical: Reactor agitator shaft orbit analysis, critical pump bearing clearance measurement
- Marine & Offshore: Propulsion shaft monitoring in high-humidity, salt-spray environments
- Pulp & Paper: High-speed roll bearing vibration surveillance
- General Rotating Machinery: Any API 670-compliant machinery protection system using 3300 XL Proximitor® drivers
Engineering Advantages
- Non-contact measurement: Zero mechanical wear; indefinite service life under normal operating conditions
- Wide thermal range: Calibrated performance from cryogenic to high-temperature process environments
- High frequency response: DC–10 kHz bandwidth captures sub-synchronous, synchronous, and super-synchronous vibration components
- Armored cable: Stainless steel braid protects against abrasion, chemical splash, and mechanical damage in congested machinery spaces
- Direct system compatibility: Plug-and-play replacement for all 3300 XL Proximitor® driver modules without recalibration
- API 670 certified: Meets machinery protection standard for critical and essential machinery classifications
System Architecture & Signal Flow
The 330703-000-050-10-11-00 probe operates as the sensing element in a three-component eddy current measurement chain:
- Probe (330703-000-050-10-11-00): Generates a high-frequency electromagnetic field (typically 1 MHz). Eddy currents induced in the conductive target attenuate the field proportionally to gap distance.
- Extension Cable (330130 / 330180 series): Transmits the RF signal from probe to Proximitor® driver. Total system cable length must match driver calibration (typically 5 m or 9 m system).
- Proximitor® Driver (3300 XL series): Demodulates the RF signal and outputs a DC voltage proportional to probe-to-target gap. Output feeds directly to Bently Nevada 3500 Series rack monitors or equivalent.
Note: This probe is calibrated for a 5 m total system (probe + extension cable). Verify total cable length matches your Proximitor® driver calibration certificate before installation.
Sourcing & Quality Verification
- All units sourced through authorized industrial distribution channels or verified surplus with full traceability documentation
- Each probe inspected for physical integrity: connector condition, cable armor, probe tip concentricity, and label legibility
- Calibration certificates and OEM documentation available upon request for critical machinery applications
- Lot traceability maintained — date codes and serial numbers recorded at intake
- Konmask.com specializes in Bently Nevada 3300 XL and 3500 Series components; our technical team can verify cross-compatibility with your existing system configuration
Procurement Process
- Confirm compatibility: Verify your Proximitor® driver model and total system cable length. Contact our engineering team if uncertain.
- Request quote: Submit your PO number, required quantity, and delivery timeline via support@konmask.com or the inquiry form.
- Lead time: In-stock units ship within 1–3 business days. Ex-works Xiamen, China. DDP/DAP available for most destinations.
- Documentation: Commercial invoice, packing list, and certificate of conformance provided as standard. CITES/export compliance documentation available on request.
- Payment: T/T (wire transfer), PayPal, and major credit cards accepted. Net-30 terms available for qualified accounts.
Technical FAQ
Q: Can this probe replace a 330703-000-050-10-00 (without the final -11-00 suffix)?
A: The suffix -11-00 denotes the connector and cable jacket variant. Functionally, the probe tip and calibration are identical. Verify connector compatibility with your extension cable before substitution.
Q: What Proximitor® driver is compatible with this probe?
A: The 330703 probe is designed for use with 3300 XL Proximitor® drivers (e.g., 330180, 330130 extension cables + 3300 XL driver). It is not directly compatible with older 7200 Series drivers without recalibration.
Q: Is recalibration required after replacement?
A: If replacing a probe of the same part number in an existing calibrated system, recalibration is typically not required. However, API 670 best practice recommends a gap voltage verification after installation.
Q: What is the target material requirement?
A: Standard calibration is for AISI 4140 steel. For non-ferrous targets (aluminum, titanium, Inconel), a target material correction factor must be applied. Contact Bently Nevada or Konmask technical support for correction curves.
Q: Do you offer volume pricing for MRO or OEM procurement?
A: Yes. Contact support@konmask.com with your annual volume estimate for tiered pricing and blanket order arrangements.
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