Bently Nevada 330705 3300 XL Reverse Mount Probe | 9m Cable

Description

Product Introduction

The 3300 XL 11 mm Proximity Probes family now includes the 330705 Reverse Mount Probe from Bently Nevada. This model uses 3/8-24 UNF threads for easy reverse mounting. It measures shaft vibration and position in tight spaces. The probe operates from -51°C to +177°C. Made in U.S.A. You get reliable data for machine protection.

Key Technical Specifications

• Brand: Bently Nevada
• Model: 330705-02-18-90-00-00
• Series: 3300 XL 11 mm Reverse Mount Probe
• Thread Type: 3/8-24 UNF (option 02-18)
• Total Length: 9.0 meters (29.5 feet) with option 90
• Connector: Miniature ClickLoc coaxial (option 00)
• Agency Approval: Not required (option 00)
• Probe Tip Material: Polyphenylene sulfide (PPS)
• Probe Case Material: AISI 304 stainless steel (SST)
• Cable Type: 75 Ω triaxial, FEP insulated
• Weight: 0.07 Kg
• DC Resistance (RPROBE): 8.5 ± 1.1 ohms for 9m length

Measurement & Performance Data

• Sensing Range: Linear for 11 mm probe tip design
• Resolution: High resolution for tiny shaft movements
• Frequency Response: DC to high frequency for vibration analysis
• Linearity: Built into 3300 XL reverse mount architecture
• Target Material: Ferrous metals recommended for best response

Temperature & Environmental Limits

• Operating & Storage Temp: -51°C to +177°C (-60°F to +351°F)
• Low Temp Caution: Below -34°C (-30°F) may damage the pressure seal
• Pressure Seal: Viton O-ring design. Not pressure tested before shipment
• Humidity: Suitable for condensing environments with protected connector

Hazardous Area Approvals

• ia Rating (with zener barriers or galvanic isolators per drawing 141092):
  • Class I, Zone 0: AEx/Ex ia IIC T4/T5 Ga
  • Class I, Groups A,B,C,D; Class II, Groups E,F,G; Class III
  • T5 @ Ta = -55°C to +40°C
  • T4 @ Ta = -55°C to +80°C
• nA, ec Rating (with nonincendive circuit per drawing 140979):
  • Class I, Zone 2: AEx/Ex nA IIC T4/T5 Gc
  • Class I, Division 2, Groups A,B,C,D
  • Class I, Zone 2: AEx/Ex ec IIC T4/T5 Gc
  • T5 @ Ta = -55°C to +40°C
  • T4 @ Ta = -55°C to +80°C

Installation Guide

• Use 3/8-24 UNF mounting hole for direct reverse mount
• Tighten connector finger tight only. Max torque 0.565 N•m (5 in•lb)
• Keep bend radius at least 25.4 mm (1.0 inch)
• Install in reverse orientation where standard probes do not fit
• Protect connector from water submersion
• Verify gap voltage with 3300 XL proximitor after installation

Debugging & Maintenance Convenience

• Check DC resistance: normal range 7.4 to 9.6 ohms for 9m cable
• Inspect cable for kinks smaller than 25.4 mm radius
• Clean PPS tip with soft cloth. Do not use harsh solvents
• Test pressure seal if your application has differential pressure
• Recalibrate every major outage using factory tools

Compatibility Notes

• Works with all 3300 XL 11 mm Reverse Mount systems
• Matches Bently Nevada proximitors and monitoring racks
• Compatible with ClickLoc extension cables
• Use 75 Ω triaxial cable for extensions
• Suitable for both new builds and retrofit projects

Certifications & Compliance

• Hazardous area approvals for Zone 0, Zone 2, and Division 2
• RoHS compliant by design
• IEC 68-2-3 damp heat tested
• Manufactured in ISO certified facility (U.S.A.)

Package Contents

• 1 x Bently Nevada 330705 reverse mount probe with 9m cable
• 1 x Miniature ClickLoc coaxial connector
• 1 x Installation instruction sheet
• Warranty: 12 months from shipment date

Shipping Methods

• FedEx – Priority express worldwide
• UPS – Global saver with tracking
• DHL – International door to door

Typical Applications & Diagnostic Ability

• Applications:
  • Reverse mount positions on turbine shafts
  • Compressor thrust bearing monitoring
  • Pump vibration where space is limited
  • Generator shaft position in tight casings
• Diagnostic Ability:
  • Detects subsynchronous vibration and whirl
  • Measures shaft eccentricity and bow
  • Identifies imbalance and misalignment early
  • Works with 3300 XL monitors for predictive analytics

FAQ – Common Questions & Buying Guide

• What is a reverse mount probe?
  It mounts from the opposite side of the target. This saves space in crowded machines.
• Can I use this probe in Zone 0 hazardous area?
  Yes, with intrinsic safety barriers per drawing 141092. Approved for Class I Zone 0.
• What thread size does this model use?
  3/8-24 UNF. Check your machine port before buying.
• Why is DC resistance 8.5 ± 1.1 ohms?
  This matches 9m cable length. Different lengths give different resistance values.
• Experience: My reverse mount probe shows noisy signal. Why?
  Check connector torque. Finger tight only. Over-tightening damages the contact.
• Experience: Can I extend the 9m cable further?
  Yes, use Bently Nevada 75 Ω triaxial extension cables. Keep total length within proximitor spec.
• Buying Guide – Which thread option to choose?
  Option 02-18 gives 3/8-24 UNF. Choose this if your machine has UNF ports.
• Buying Guide – Do I need agency approval option 00?
  Option 00 means no approval. Pick this for non-hazardous or safe area use only.
• Buying Guide – Total length 90 vs 50 vs 10.
  90 = 9 meters for long runs from driver to monitor. Shorter lengths save cost for close mounts.
• What is the minimum bend radius?
  25.4 mm (1.0 inch). Never bend tighter than this.

Contact & Support

For inquiries, please contact: +86 158 8020 0923 (WhatsApp)

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