Product Core Brief
- Full Model: 330903-00-09-10-02-05
- Brand: Bently Nevada (Baker Hughes)
- Series: 3300 XL NSv Compact Eddy-Current Proximity Transducer System
- Full Suffix Decode (330903-AA-BB-CC-DD-EE):
- 330903：Base probe, M8×1 metric thread, non-armored outer cable jacket
-00：0 mm unthreaded tip section-09：90 mm total stainless steel probe casing length-10：1.0 m integrated probe cable length-02：Mini ClickLoc coaxial connector, standard FluidLoc sealed cable joint-05：Full hazardous area certifications: ATEX, IECEx, CSA; SIL 2 functional safety rating
- Core Function: Compact non-contact eddy-current probe for measuring radial shaft vibration, axial thrust displacement, and Keyphasor rotational speed signals on centrifugal compressors, small gas turbines, and rotating equipment with limited mounting clearance
- Product Type: One-piece integrated proximity probe with factory-attached signal cable
- Key Specs: M8×1 mounting thread | 1.5 mm linear measurement range | 7.87 V/mm (200 mV/mil) scale factor | 75Ω coaxial cable | SIL2 + multi hazardous area approvals
- Condition: New Original (New Surplus), active OEM spare, no published obsolescence schedule
Key Technical Specifications
| Parameter | Defined Value |
|---|---|
| Mechanical Thread | M8×1 stainless steel mounting thread |
| Unthreaded Tip Length | 0 mm (thread runs all the way to probe sensing tip) |
| Probe Casing Length | 90 mm overall stainless steel housing |
| Integrated Cable Length | 1.0 meter factory molded cable |
| Cable Electrical Characteristic | 75Ω coaxial, capacitance 69.9 pF/m, FluidLoc anti-oil-wicking molded joint |
| Connector Type | Miniature ClickLoc lockable coaxial male connector (tool-free finger lock) |
| Linear Measurement Range | 0.25 mm ~ 1.75 mm (60 mil full linear span) |
| Recommended Operating Gap | 1.0 mm (40 mil) mid-range for optimal linearity |
| Standard Scale Factor | 7.87 V/mm (200 mV/mil) when paired with matching NSv Proximitor sensor |
| Minimum Target Diameter | 8.9 mm metallic target surface |
| Probe DC Resistance (1m cable) | 4.2 Ω ±0.5 Ω factory calibrated |
| Operating Temperature Range | Probe tip: −45°C ~ +100°C; cable: −45°C ~ +100°C continuous |
| Surface Material | Case: AISI 304 stainless steel; sensing tip: chemical-resistant PPS polymer |
| Mechanical Bend Limit | Static cable minimum bend radius 25.4 mm |
| Compliance & Certifications | API 670, CE EMC Class A, SIL 2, ATEX, IECEx, CSA hazardous location approvals (suffix 05) |
| Compatible System Hardware | Matched 3300 NSv Proximitor signal conditioners; fully interoperable with all 3500 TSI monitor modules |
| Mechanical Form | Non-armored flexible FEP cable jacket (no stainless steel braid) |
Product Introduction
This compact NSv series proximity probe is designed for tight, restricted mounting spaces on industrial compressors and small turbine bearing housings where standard 8mm/11mm XL probes cannot fit. The M8×1 full-threaded short-tip design simplifies installation into shallow counterbores and side-view mounting ports.
FluidLoc molded cable joints block turbine lube oil and process fluid ingress, eliminating drift caused by liquid contamination inside the coaxial conductors. The suffix -05 multi-certification variant is approved for Class I Div 2 / Zone 2 hazardous gas environments, suitable for refinery, LNG, and chemical plant rotating machinery safety monitoring systems.
This probe cannot operate standalone; a complete measurement stack requires: NSv probe + NSv extension cable (if longer total length needed) + matching NSv Proximitor sensor, wired into 3500/42M or 3500/50 TSI rack monitor modules. It is electrically incompatible with standard 5/8/11mm 3300 XL probe systems due to different 75Ω impedance matching parameters.
Firmware/Software Versions & Upgrade Notes
The probe is a passive analog sensing assembly with no onboard firmware. System compatibility rules apply to paired Proximitor and 3500 rack monitors:Minimum compatible 3500 monitor firmware: Revision G; minimum Rack Configuration Software v2.00. All M-series monitor modules must run unified matching firmware revisions to correctly interpret the NSv 200 mV/mil linear gap voltage curve.No probe-specific software configuration is required after physical installation; only the total combined length (1m probe + optional extension cable) must be entered into rack configuration software to lock transducer sensitivity calibration. Always verify total system length before commissioning to eliminate static measurement offset errors.
Frequently Asked Questions (FAQ)
- Is hot-disconnecting the probe connector safe while the 3500 rack remains energized?Proximitor and TSI rack monitors stay powered during connector removal. Unplugging this probe triggers persistent channel fault flags and full loss of vibration/thrust displacement data, but no permanent damage occurs to monitor analog input circuits. Fully re-seat the ClickLoc connector until the locking tab clicks to clear fault alarms.
- Is this part obsolescent, and are direct drop-in hardware upgrades available?This NSv probe remains an active OEM catalog spare with no formal end-of-life date. The mechanical upgrade variant is 330904-00-09-10-02-05, which adds stainless steel braided armor for abrasive cabinet routing; it shares identical electrical performance and connector pinout but thicker outer diameter requires modified cable gland hardware, so it is not zero-modification plug-and-play.
- Will transducer linearity or gap calibration data erase if the rack loses full power?All system sensitivity and total length calibration parameters store in non-volatile flash memory on the paired 3500 monitor module, not the probe assembly itself. Full rack power loss does not erase transducer configuration data; swapping this unit requires only physical reconnection with no software rework if total system length stays unchanged.
- What warranty terms separate New Surplus inventory from refurbished alternatives?New Surplus probe assemblies carry a 12-month functional warranty covering coil linearity, 75Ω impedance consistency, ClickLoc connector plating integrity, FluidLoc molded seal performance, and full hazardous area certification validity. Refurbished probes typically offer only 3–6 month limited coverage and carry hidden risks of cracked PPS tip insulation, worn connector locking tabs, and compromised liquid sealing that cause drifting vibration readings during turbine thermal cycles.
- Why does New Surplus pricing sit higher than generic used/refurbished marketplace listings?All New Surplus probe assemblies complete mandatory standardized QC validation: serial traceability cross-check against OEM production logs, full length impedance and capacitance bench testing, linearity sweep testing across full 1.5mm measurement range, tensile pull-load testing to validate FluidLoc joint adhesion, 1000-cycle connector lock durability testing, and sealed anti-static factory packaging with full certification documentation. Refurbished lots skip this multi-step electrical and mechanical validation workflow, introducing unplanned downtime risk for safety-critical compressor vibration and thrust position protection loops.
- Can this NSv probe mate with standard 3300 XL 8mm Proximitor sensors?No, the NSv series uses 75Ω coaxial matching, while standard 8/11mm XL probes use 50Ω triaxial impedance. Cross-mixing hardware will break linearity and generate severe measurement offset errors; only dedicated NSv Proximitor signal conditioners are compatible. Verify against the 3300 XL NSv datasheet before mixing transducer hardware to avoid permanent Proximitor input circuit damage.
- Does the probe locally store vibration waveforms or long-term rotor position trending logs?No, the assembly is a fully passive analog sensing component with zero memory or signal processing hardware. All vibration amplitude, axial thrust displacement, and Keyphasor rotational speed trending records are captured and retained exclusively by the Slot1 3500/20 TDI master communication gateway module. This probe only outputs raw high-frequency eddy-current gap voltage signals without modifying or storing measurement data.
