Bently Nevada 144181-50-05 Proximity Sensor – High-Precision Eddy Current Probe | 3300 Series Platform
Engineering Background
The Bently Nevada 144181-50-05 is a factory-calibrated eddy current proximity sensor engineered for continuous, non-contact measurement of shaft vibration, position, and eccentricity in rotating machinery. Designed as a core component of the Bently Nevada 3300 Series monitoring system, this probe delivers the measurement accuracy and long-term reliability demanded by power generation, petrochemical, and heavy industrial applications.
Product Positioning
This sensor is the preferred choice for procurement engineers sourcing OEM-equivalent replacement probes for Bently Nevada 3300 Series monitor systems. It is fully interchangeable with existing 3300 XL installations and maintains calibration traceability to Bently Nevada factory standards. Konmask.com supplies this part with full documentation support and quality verification.
Complete Technical Specifications
- Part Number: 144181-50-05
- Manufacturer: Bently Nevada (Baker Hughes)
- Series / Platform: 3300 Series Eddy Current Proximity System
- Sensor Type: Eddy Current (Non-Contact) Proximity Probe
- Probe Tip Diameter: 5 mm (standard)
- Cable Length: 5.0 m (integral armored cable)
- Sensitivity: 7.87 V/mm (200 mV/mil) nominal
- Linear Range: 0.25 – 2.25 mm (10 – 90 mil)
- Frequency Response: DC to 10,000 Hz (–3 dB)
- Operating Temperature: –35°C to +177°C (–31°F to +351°F)
- Supply Voltage: –24 VDC (nominal, via proximitor/extension cable)
- Output Voltage Range: –2 VDC to –18 VDC
- Target Material: AISI 4140 steel (or equivalent ferromagnetic alloy)
- Connector Type: Integral coaxial, mates with 3300 Series extension cable
- Housing Material: Stainless steel, hermetically sealed
- Weight: 260 g (probe + cable assembly)
- Approvals / Certifications: CE, ATEX (consult datasheet for zone classification)
- Country of Origin: USA
Proven Application Environments
- Steam and gas turbine shaft vibration monitoring (API 670 compliant installations)
- Centrifugal compressor radial and axial position measurement
- Pump and motor bearing proximity monitoring
- Gearbox eccentricity and runout measurement
- Expander and blower rotor dynamic analysis
- Retrofit and replacement in existing Bently Nevada 3300 / 3300 XL monitor racks
Engineering Advantages
- Non-contact measurement: Zero mechanical wear, suitable for continuous 24/7 operation
- Factory calibration: Each probe ships with calibration data traceable to Bently Nevada standards
- Wide temperature range: Qualified for high-temperature turbine environments up to 177°C
- Direct 3300 Series compatibility: Plug-and-play replacement; no re-calibration of monitor required
- Hermetically sealed housing: Resistant to oil mist, steam, and process gas ingress
- Integral armored cable: Protects signal integrity in high-EMI industrial environments
System Architecture & Signal Flow
The 144181-50-05 probe operates as part of a three-component eddy current measurement chain:
- Proximity Probe (144181-50-05): Generates an oscillating electromagnetic field at the probe tip; detects changes in target distance via eddy current loading.
- Extension Cable: Transmits the high-frequency coaxial signal from the probe to the proximitor (driver). Cable length must be matched to the probe and proximitor for correct system calibration.
- Proximitor / Driver Module (e.g., 3300 XL 8mm): Demodulates the probe signal and outputs a DC voltage proportional to gap distance, fed to the 3300 Series monitor rack for alarm and trip processing.
Note: Total system cable length (probe cable + extension cable) must match the proximitor calibration range. Consult Bently Nevada system documentation before substituting cable lengths.
Sourcing & Quality Verification
- All units sourced through authorized industrial distribution channels or verified surplus with full traceability
- Pre-shipment inspection includes: visual examination, connector integrity check, and part number label verification
- Original manufacturer packaging preserved where available; repackaged units include inspection report
- Counterfeit-risk mitigation: part number, date code, and housing markings verified against Bently Nevada reference standards
- Certificate of Conformance (CoC) available upon request
Procurement Process
- Submit your RFQ via the product page or email support@konmask.com
- Receive stock confirmation and lead time within 1 business day
- Review and approve proforma invoice
- Payment processed via T/T, PayPal, or approved credit terms
- Shipment with tracking number and packing list issued within 2–3 business days
- Post-delivery technical support available for installation and commissioning queries
Technical FAQ
- Q: Is the 144181-50-05 compatible with the Bently Nevada 3300 XL monitor?
- A: Yes. This probe is designed for the 3300 Series platform and is fully compatible with 3300 XL monitor modules when used with the correct extension cable and proximitor combination.
- Q: What extension cable should be paired with this probe?
- A: The total cable system length must match the proximitor calibration. Common pairings use Bently Nevada 330130 series extension cables. Contact us with your proximitor model for a confirmed recommendation.
- Q: Can this sensor be used on non-ferromagnetic targets (e.g., titanium, aluminum)?
- A: Eddy current probes can detect non-ferromagnetic conductive targets, but sensitivity and linear range will differ from the standard AISI 4140 calibration. A target material correction factor or field recalibration is required.
- Q: What is the lead time for this part?
- A: In-stock units ship within 2–3 business days. For out-of-stock inquiries, typical lead time is 2–4 weeks depending on sourcing channel. Contact us for current availability.
- Q: Do you provide a warranty?
- A: Yes. Konmask.com provides a 90-day functional warranty on all verified units. Extended warranty options are available for volume orders.
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