Component Snapshot At-a-Glance

• Model: 330106-05-30-10-02-CN
• Alt. P/N: 330106-05-30-05-02-CN (0.5m built-in cable variant, cannot cross-swap for 1m cable systems)
• Product Series: Bently Nevada 3300 XL 8mm eddy-current proximity transducer system
• Hardware Type: Reverse-mount armored proximity probe with 1m integral coaxial cable, M10×1 thread
• Key Feature: 7.87 V/mm (200 mV/mil) fixed sensitivity, rear-facing tip reverse installation, ClickLoc mini coaxial connector, NEPSI CN hazardous area certification
• Primary Field Use: Measure shaft radial vibration, thrust position, Keyphasor speed signal on steam/gas turbines, centrifugal compressors where forward probe mounting is mechanically blocked by bearing housings.

Hard-Numbers: Technical Specifications

• Protocol Support: Pure analog eddy-current excitation signal; hardwired via extension cable to 330180 series Proximitor preamp
• Port Count: Integrated 1m coaxial cable with male miniature ClickLoc connector; M10×1 threaded mounting body with Viton O-ring pressure seal
• Baud/Data Rate: N/A analog signal; usable frequency bandwidth 0–10kHz (-3dB attenuation)
• Operating Temperature: Probe body -35°C to +177°C; coaxial cable rated -51°C to +260°C high-temperature bearing zones
• Isolation Rating: 50Ω coaxial shielded cable provides inherent signal isolation from cabinet VFD noise; galvanic separation handled at Proximitor preamp
• Power Draw: Passive sensor, no power consumption; excitation supplied from paired 330180 series -24VDC Proximitor preamp
• Linear Measurement Range: 0.25mm to 2.3mm (10–90 mils); nominal mid installation gap 1.27mm (-10VDC gap voltage)
• Mechanical Specs: M10×1 stainless steel housing, reverse mount torque limit 11.2 N·m (100 in-lbf); PPS high-temperature probe tip, 300lb cable pull strength
• Certifications: API 670, CE, ATEX Zone 2, Class I Div 2, NEPSI CN explosion certification for domestic Chinese refinery/power plant compliance
• Physical Dimensions: 30mm threaded case length, integral 1.0m armored coaxial cable, IP64 sealed body

The Real-World Problem It Solves

Standard forward-mount 330104 probes cannot fit deep recessed bearing housings or compressor thrust collars with external obstruction. Forcing forward mount leads to short cable runs, sharp bends that crack coaxial shielding and create chronic gap voltage drift.Non-CN certified probes fail local hazardous area inspection requirements; refinery and power plant Zone 2 machinery cabinets cannot operate uncertified transducers per GB 3836 codes.Mixing 0.5m and 1m integral cable probes creates impedance mismatch with matched-length Proximitor preamps, skewing sensitivity and triggering persistent false vibration Danger trips on 3500 protection racks.Where you’ll typically find it:

• Combined-cycle gas turbine thrust bearing housings with blocked forward mounting access
• Refinery high-speed centrifugal compressor radial vibration monitoring in deep bearing bores
• Domestic coastal power plant Zone 2 turbine enclosures requiring NEPSI CN explosion certificationReverse rear-facing tip eliminates mechanical mounting clearance conflicts, factory fixed 1m cable length guarantees impedance matching with 9m full system Proximitors, and CN certification removes site safety compliance paperwork delays for Chinese industrial sites.

Hardware Architecture & Under-the-Hood Logic

This passive eddy-current probe contains only a wound copper coil sealed inside PPS tip, no internal electronics or microcontroller. The coil generates alternating magnetic field when driven by paired Proximitor preamp oscillator circuitry.

1. Integral armored 75Ω coaxial cable carries high-frequency excitation signal from 330180 preamp to probe tip coil; double shield armor blocks bearing housing EMI and mechanical abrasion.
2. Reverse mount body geometry orients the sensing coil rearward toward the rotating shaft target; Viton O-ring seals against bearing housing oil leakage and differential pressure.
3. M10×1 stainless steel threaded sleeve locks probe position with low torque limit to avoid crushing internal coaxial wiring during installation.
4. Miniature ClickLoc male connector locks onto matching extension cable female fitting; patented CableLoc strain relief prevents vibration-induced cable breakage at the probe root.
5. PPS high-temperature tip insulation maintains stable coil inductance through wide bearing housing thermal cycling, limiting sensitivity shift under load temperature swings.
6. Full NEPSI CN compliant construction eliminates flammable plastic components, meeting domestic hazardous area installation rules for oil & gas processing units.

Field Service Pitfalls: What Rookies Get Wrong

Dual-End Grounding Probe Coaxial Cable Shield Braids

New techs ground coaxial armor shield both at the probe ClickLoc fitting and turbine junction box. Rotating machinery hull potential differences create circulating ground loop current, distorting gap voltage and triggering random false high vibration shutdown trips during compressor startup transients.Field Rule: Terminate probe cable shield only at the 3500 rack chassis ground stud; fully tape and isolate shield braid at all turbine bearing housing junction boxes, no secondary ground points.

Substituting 0.5m 330106-05-30-05-02-CN Probe In Place Of 1m Unit

Field crews swap 0.5m short-cable spare probes onto systems calibrated for 1m integral cable. Impedance mismatch shifts ASF sensitivity beyond ±5% tolerance; gap voltage drifts heavily with temperature, invalidating all vibration alarm setpoints programmed in the 3500 rack.Quick Fix: Strict full part number matching for 1m integral cable reverse mount systems: deploy only 330106-05-30-10-02-CN. Reserve 0.5m variants exclusively for shallow, short-run bearing bore installations.

Over-Torquing Reverse Mount Threaded Body During Gap Adjustment

Techs apply forward-probe 34 N·m torque when locking this reverse mount probe. Excess torque crushes internal coaxial wiring insulation inside the stainless steel sleeve, creating intermittent short circuits and unsteady gap voltage readings.Field Rule: Max installation torque limited to 11.2 N·m (100 in-lbf) for all 330106 reverse mount probes; adjust gap to target -10VDC midpoint before locking the jam nut at rated torque, no over-tightening.

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.