Bently Nevada 24701-34-05-00-031-04-02 – Proximity Probe Housing Assembly | 3300 XL Series Platform
Engineering Background: The Bently Nevada 3300 XL Series represents the industry benchmark for eddy-current proximity sensing in rotating machinery protection. The housing assembly model 24701-34-05-00-031-04-02 is a precision-engineered mechanical enclosure and cable integration component designed to protect and position the proximity probe tip with exact dimensional repeatability. It is a critical field-replaceable unit (FRU) used in turbine, compressor, and pump monitoring installations worldwide.
Product Positioning: This housing assembly is specified by OEM machinery builders and MRO procurement engineers who require dimensional interchangeability, environmental sealing, and signal integrity compliance with Bently Nevada 3300 XL monitor cards. Konmask.com supplies this part with full traceability documentation, supporting both planned maintenance shutdowns and emergency replacement scenarios.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 24701-34-05-00-031-04-02 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Series / Platform | 3300 XL Proximity System |
| Component Type | Proximity Probe Housing Assembly |
| Probe Tip Diameter | 8 mm (standard 3300 XL) |
| Cable Length (integrated) | Per suffix code: 5.0 m extension |
| Housing Material | Stainless steel body with PTFE-insulated cable |
| Thread / Mounting | M10 × 1.0 mm probe thread (standard) |
| Temperature Range | −40 °C to +177 °C (probe tip) |
| IP Rating | IP67 (housing seal) |
| Sensing Range | 0.25 mm – 2.54 mm (linear range) |
| Output Sensitivity | −7.87 V/mm (−200 mV/mil) |
| Bias Voltage | −10 VDC nominal at mid-range |
| Compatible Driver | 3300 XL 8 mm Proximitor® Sensor |
| Weight | 2,220 g (assembly with cable) |
| Approvals | CE, ATEX, IECEx (refer to datasheet) |
Proven Application Environments
- Steam & Gas Turbines — Radial shaft vibration and axial position monitoring on HP/LP turbine stages
- Centrifugal Compressors — Continuous rotor orbit and eccentricity measurement in API 670-compliant installations
- Pumps & Fans — Bearing housing proximity sensing for predictive maintenance programs
- Gearboxes — Gear mesh frequency and shaft runout detection
- Hydro Turbines — Slow-speed shaft monitoring with extended linear range
- Marine Propulsion — Shaft alignment verification in confined machinery spaces
Engineering Advantages
- Dimensional Interchangeability — Drop-in replacement for existing 3300 XL probe installations; no re-calibration of monitor required when replacing like-for-like
- Hermetic Housing Seal — IP67-rated stainless steel body prevents moisture ingress in wash-down and outdoor environments
- Low Thermal Drift — Precision-wound coil assembly maintains sensitivity within ±1% across full operating temperature range
- Integrated Cable Management — Factory-terminated extension cable eliminates field-splice points that introduce impedance discontinuities
- API 670 Compliance — Meets machinery protection standard for radial vibration, axial position, and speed measurement channels
- Long Service Life — Stainless steel construction resists corrosion in H₂S, steam, and hydrocarbon atmospheres
System Architecture & Signal Flow
The 3300 XL proximity system operates on the eddy-current principle. The 24701-34-05-00-031-04-02 housing assembly positions the probe coil at a calibrated standoff distance from the rotating shaft target. The integrated extension cable carries the RF oscillator signal from the Proximitor® driver to the probe tip and returns the demodulated DC voltage proportional to gap distance.
Signal chain: 3300 XL Monitor Card → Proximitor® Sensor (driver) → Extension Cable → Housing Assembly (this part) → Probe Tip → Shaft Target Surface
The housing assembly must be matched to the correct Proximitor® driver part number and target material (steel, stainless, or non-ferrous) to maintain system calibration. Konmask engineers can verify compatibility before shipment.
Sourcing & Quality Verification
- OEM Traceability — Each unit supplied with manufacturer documentation; batch/lot records available on request
- Incoming Inspection — 100% dimensional check and continuity/impedance test performed before dispatch
- Calibration Certificate — Factory calibration data sheet included; field re-calibration not required for direct replacement
- Packaging — Anti-static foam-lined box with desiccant; probe tip protected by machined cap
- Shelf Life — Unlimited when stored per Bently Nevada storage guidelines (dry, 15–35 °C)
Procurement Process
- Submit RFQ — Email support@konmask.com with part number 24701-34-05-00-031-04-02, required quantity, and delivery deadline
- Receive Quote — Price and lead time confirmed within 24 business hours; volume pricing available for 5+ units
- Order Confirmation — Purchase order accepted via email; proforma invoice issued for prepayment or net terms
- Inspection & Dispatch — Quality check completed; shipped via DHL/FedEx with tracking number provided
- After-Sales Support — Technical assistance available for installation, commissioning, and compatibility queries
Technical FAQ
Q: Is 24701-34-05-00-031-04-02 a direct replacement for older 3300 series probe assemblies?
A: The 3300 XL series is backward-compatible with 3300 series Proximitor® drivers in most configurations. Verify driver part number and target gap specification before installation.
Q: What target material is this probe calibrated for?
A: Standard calibration is for AISI 4140 steel. For stainless steel or non-ferrous targets, a recalibration factor must be applied — contact Konmask for the correction table.
Q: Can the housing assembly be used in ATEX Zone 1 hazardous areas?
A: Yes, provided the complete system (probe + driver + monitor) carries the appropriate ATEX/IECEx certification. Verify the full system certificate before installation in classified areas.
Q: What is the lead time for this part?
A: In-stock units ship within 3–5 business days. Out-of-stock lead time is 4–8 weeks depending on manufacturer availability. Contact us for current stock status.
Q: Does Konmask provide installation support?
A: Yes. Our technical team provides remote commissioning guidance, gap-setting procedures, and system integration advice at no additional charge.
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