Product Core Brief

• Full Model: 330103-00-04-10-02-CN
• Brand: Bently Nevada (Baker Hughes)
• Series: 3300 XL 8mm Eddy-Current Transducer, M10 Metric Reverse Mount Non-Armored Series

Complete Suffix Decode

1. 330103: Base probe model
   • Thread: M10×1 metric fine thread
   • Mounting: Reverse rear counterbore installation
   • Cable: Factory integrated non-armored FEP triaxial cable
2. -00 (A segment): Unthreaded tip length = 0 inch (thread runs fully to sensing head)
3. -04 (B segment): Stainless steel probe housing total length = 0.4 inch (40 mm) ultra-short compact body
4. -10 (C segment): Factory pre-attached cable length = 1.0 meter
5. -02 (D segment): Mini gold-plated ClickLoc tool-free locking coaxial connector, standard FluidLoc oil-sealed molded joint
6. -CN (Final suffix): China special certification version, carries NEPSI domestic intrinsic safety explosion certification + ATEX/IECEx Zone2 global approvals, SIL2 functional safety rating

• Core Function: Compact rear-install eddy-current proximity probe, mounted from bearing housing back counterbores when front mounting is blocked by shaft, mechanical seals or bearing structures. Used for radial shaft vibration, axial thrust displacement and Keyphasor rotational speed measurement on gas/steam turbines, centrifugal compressors for safety instrumented protection loops.
• Product Type: One-piece factory integrated probe + non-armored 50Ω triaxial signal cable assembly
• Key Specs: M10×1 reverse mount thread | 1m FEP non-armored cable | 7.87 V/mm (200 mV/mil) standard linear sensitivity | FluidLoc anti-lube-oil infiltration molding | Dual domestic & international explosion-proof safety certifications
• Condition: New Original (New Surplus), active OEM petrochemical & power plant spare, no formal obsolescence schedule

 

Key Technical Specifications

表格

Parameter	Defined Value
Mounting Thread	M10×1 metric fine thread, rear reverse counterbore mounting design
Unthreaded Tip Section	0 inch, full threaded PPS chemical resistant insulated sensing tip
Probe Stainless Steel Housing	0.4 inch (40 mm) ultra-short compact casing for shallow narrow rear mounting holes
Factory Integrated Cable Length	1.0 m matched 50Ω triaxial cable
Cable Electrical Property	50Ω low capacitance triaxial (69.9 pF/m), FEP high-temperature oil-resistant outer jacket, no stainless steel armor
Sealing Technology	Patented FluidLoc molded probe-cable integrated joint, blocks turbine lube oil and process liquid wicking into internal conductors
Connector Hardware	Mini ClickLoc finger-lock gold-plated coaxial male connector, tool-free lock/unlock
Linear Measurement Range	0.25 mm ~ 2.3 mm full linear span; factory recommended installation gap 1.27 mm (50 mil) mid-range
Standard 8mm XL System Sensitivity	7.87 V/mm (200 mV/mil) linear DC gap voltage output when matched with dedicated 330180 8mm Proximitor signal conditioner
Minimum Metallic Target Requirement	Flat target ≥15.2 mm diameter; minimum recommended monitoring shaft diameter ≥51 mm
Operating Temperature Range	Probe tip: −52°C ~ +177°C continuous; cable: −45°C ~ +100°C continuous cabinet operation
Mechanical Bend Limits	Static cable minimum bend radius 25.4 mm; dynamic vibration routing ≥50.8 mm
Axial Tensile Pull Strength	Max 330 N (75 lbf) without joint separation or internal wire breakage
Compliance & Certifications	API 670 4th Edition, CE EMC Class A, SIL2 functional safety; ATEX/IECEx Zone 2, CSA Div2, NEPSI China intrinsic safety explosion certification (unique CN suffix qualification)
System Hardware Compatibility	Exclusively matched with 3300 XL 8mm series 50Ω Proximitor sensors (330180 series); analog output fully interoperable with all 3500 TSI rack monitor modules (3500/42M, 3500/50)
Mechanical Feature Distinction	Non-armored flexible FEP cable, lightweight for low-friction narrow cabinet routing

 

Product Introduction

This ultra-short M10 metric reverse-mount proximity probe solves two core on-site installation pain points:

1. Rear counterbore mounting limitation: Front mounting space blocked by shaft, mechanical seals or bearing structure, only rear-side installation available
2. Ultra-shallow rear counterbores: The 40mm short housing fits extremely limited depth mounting holes where longer standard reverse mount probes cannot be installed

The FluidLoc molded integrated joint eliminates slow measurement drift caused by lubrication oil penetrating triaxial conductors, a major failure point of generic aftermarket replacement probes.

The -CN suffix variant is customized for Chinese refinery, LNG, chemical plant and thermal power hazardous classified zone projects, carrying both international ATEX/IECEx and domestic NEPSI explosion-proof certifications, fully compliant with China’s local explosion safety inspection standards, replacing the standard -05 multi-cert export-only model for domestic bidding and site acceptance.

Complete 8mm XL Measurement System Composition

M10 Reverse Mount Probe (330103 series) + optional matching 330130 extension cable + dedicated 330180 8mm Proximitor signal conditioner + 3500 series TSI rack monitor

Critical Compatibility Limitation

This standard 8mm XL probe uses 50Ω triaxial impedance, completely incompatible with 75Ω NSv miniature probe front ends (330980 series). Cross-mixing hardware will destroy linearity and produce severe permanent measurement offset errors.

Model Series Distinction (M10 Reverse Mount 8mm XL)

• 330103: M10×1 metric reverse mount, non-armored cable (this model)
• 330106: M10×1 metric reverse mount, factory integrated stainless steel braided armored cableAll 330103/330106 share identical 50Ω triaxial electrical matching, interchangeable within the full 8mm 3300 XL system.

 

Firmware & Software Compatibility Notes

This probe is a passive analog sensing assembly with no onboard firmware. System matching rules for paired 8mm Proximitor and 3500 TSI rack monitors:

• Minimum compatible 3500 monitor firmware revision: Revision G
• Minimum Rack Configuration Software version: v2.00
• All M-series monitor modules inside the 3500/05 chassis must run unified matching firmware revisions to correctly interpret the 8mm 200 mV/mil linear gap voltage characteristic curve.
• Mandatory commissioning step: Input total combined transducer length (1m probe + optional extension cable) into rack configuration software to activate built-in cable capacitance linearity compensation; incorrect length input generates permanent static measurement offset errors.

 

Frequently Asked Questions

1. Can I disconnect the probe ClickLoc connector while the 8mm Proximitor 24VDC power remains live?Yes, power shutdown is not required for connector disconnection. Unplugging the RF input triggers persistent channel fault alarms on the 3500 rack and cuts all vibration/thrust displacement data, but no permanent damage occurs to the Proximitor internal circuit or rack monitor analog input. Fully re-seat the ClickLoc connector until the locking tab clicks to clear fault status.
2. Is this part obsolete? Are there direct plug-and-play alternative variants?This ultra-short M10 reverse mount probe remains active OEM stock with no end-of-life date:

• General industrial non-hazardous version: 330103-00-04-10-02-00 (no explosion certifications, cannot be deployed in classified zones)
• Global export multi-cert version: 330103-00-04-10-02-05 (ATEX/IECEx/CSA only, without Chinese NEPSI, fails domestic hazardous zone site inspection)The -CN version is uniquely qualified for Chinese explosion classified safety instrumented loops and cannot be zero-modification interchanged with -00/-05 for domestic refinery/chemical plant projects.

1. Will transducer linearity or gap calibration data erase if the rack loses full power?All 8mm system length and sensitivity 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 only requires physical reconnection with zero software rework if total transducer length stays unchanged.
2. What warranty and reliability differences separate New Surplus original vs refurbished units?New Surplus factory original probes carry a 12-month full functional warranty covering coil linearity, 50Ω triaxial impedance consistency, ClickLoc connector plating integrity, FluidLoc molded seal performance, and full NEPSI/ATEX certification validity. Refurbished probes only offer 3–6 month limited coverage, with hidden risks of cracked PPS tip insulation, worn connector locking tabs, and compromised liquid sealing that cause drifting vibration readings during turbine thermal load cycles.
3. Why is New Surplus original pricing higher than generic used/refurbished alternatives?All brand-new original probes pass complete standardized factory QC validation: serial traceability against OEM production logs, full 0–2.3mm linearity sweep bench testing, 24-hour thermal soak aging test, RF input impedance matching verification, 1000-cycle connector lock durability testing, and sealed anti-static factory packaging with full dual certification documentation. Refurbished units skip this multi-step electrical and mechanical testing workflow, introducing unplanned downtime risk for safety-critical compressor vibration and thrust position protection loops.
4. Can this M10 reverse mount probe mate with NSv 330980 series Proximitor sensors?No, this 8mm XL probe uses 50Ω triaxial matching parameters exclusive to 330180 8mm dedicated front ends. NSv probe systems adopt 75Ω coaxial cables with different capacitance matching parameters; cross-mixing hardware completely breaks measurement linearity and generates severe permanent offset errors. Verify 8mm XL vs NSv impedance before wiring to avoid irreparable Proximitor RF input circuit damage.
5. 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, Keyphasor rotational speed trending records and fault event logs 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.