Bently Nevada 330705 Reverse Mount Probe | 5m 3300 XL 11mm

Description

Product Overview

• Bently Nevada 330705-02-18-50-00-00 is a 3300 XL 11 mm Reverse Mount Probe.
• This reverse mount design saves space in tight turbine casings.
• Made in USA. Reliable for vibration and position monitoring.
• Use it with 5 meter Proximitor Sensor only (special requirement).

Part Number Breakdown – Understand Your Probe

• ▹ 330705 – 3300 XL 11 mm Reverse Mount Probe
• ▹ 02 – 3/8-24 UNF threads
• ▹ 18 – Unthreaded length option
• ▹ 50 – Total length: 5.0 meters (16.4 feet)
• ▹ 00 – Miniature ClickLoc coaxial connector
• ▹ 00 – No agency approval required

Technical Specifications

• ▹ Manufacturer: Bently Nevada
• ▹ Model: 330705-02-18-50-00-00
• ▹ Series: 3300 XL 11 mm Proximity Probes – Reverse Mount
• ▹ Thread type: 3/8-24 UNF
• ▹ Total cable length: 5.0 meters (16.4 feet)
• ▹ Connector type: Miniature ClickLoc coaxial
• ▹ Probe tip material: Polyphenylene sulfide (PPS)
• ▹ Probe case material: AISI 304 stainless steel
• ▹ Cable specification: 75 Ω triaxial, FEP insulated
• ▹ Weight: 0.07 kg (very light)

Electrical Data – DC Resistance

• For 5.0 meter probe length: Resistance from center to outer conductor is 7.2 ± 0.8 ohms.
• Use this value to check cable health during maintenance.
• Only pair with 5 meter Proximitor Sensor. Other lengths will not work correctly.

Temperature & Environmental Limits

• Operating and storage temperature: -52°C to +177°C (-62°F to +351°F).
• Do not expose probe below -34°C (-30°F) – this may damage the pressure seal.
• Pressure sealing: Viton O-ring seals differential pressure.
• Probes are not pressure tested before shipment. Contact us for custom testing.

Mechanical Installation – Torque & Bending

• Connector torque: Finger tight only. Maximum 0.565 N•m (5 in•lb).
• Minimum bend radius for cable: 25.4 mm (1.0 inch) – with or without armor.
• Exceeding bend radius may damage internal conductors.

Hazardous Area Approvals – Safety First

• Intrinsically safe (ia) 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
• Nonincendive (nA/ec) per drawing 140979:
  • Class I, Zone 2: AEx/Ex nA IIC T4/T5 Gc
  • Class I, Division 2, Groups A,B,C,D
  • T5 @ Ta = -55°C to +40°C | T4 @ Ta = -55°C to +80°C

Installation Guide

• Clean mounting hole and probe tip before installation.
• Screw probe into mounting hole using 3/8-24 UNF threads.
• Tighten connector finger tight only. Do not use tools.
• Connect to 5 meter Proximitor Sensor – this is mandatory.
• Keep cable bend radius larger than 25.4 mm (1 inch).
• For hazardous areas, follow approved barrier drawings (141092 or 140979).

Debug & Maintenance

• Measure DC resistance: should read 7.2 ± 0.8 ohms for 5m cable.
• Check connector for corrosion or loose fit.
• Inspect cable for kinks or cuts – replace if damaged.
• Use Bently Nevada diagnostic tools to verify gap voltage.

Compatibility

• Only works with 5 meter Proximitor Sensor. Do not use with 1m or 9m sensors.
• Compatible with all Bently Nevada 3300 XL monitoring systems.
• Use with approved zener barriers or galvanic isolators for hazardous areas.
• Can integrate with Modicon Quantum PLCs via signal converters.

Certifications & Compliance

• Intrinsically safe (ia) for Zone 0 and Division 1 hazardous areas.
• Nonincendive (nA/ec) for Zone 2 and Division 2.
• Temperature class T4 (80°C) and T5 (40°C).
• Made in USA. Meets Bently Nevada quality standards.

Package Contents & Warranty

• 12 months warranty from invoice date. Covers defects.
• Package includes: 1 x 330705 reverse mount probe with attached cable and ClickLoc connector.
• Proximitor Sensor sold separately.
• Return defective units for replacement under warranty.

Shipping – Fast Worldwide Delivery

• We ship with FedEx, UPS, DHL express services.
• Tracking number within 24 hours. Insurance included.
• Typical delivery: 3-7 business days.

Typical Applications

• Reverse mount fits tight turbine casings where standard probes cannot go.
• Compressor shaft vibration monitoring.
• Generator bearing position measurement.
• Pump axial thrust detection.

Diagnostic Capability

• Measures static gap (position) and dynamic vibration.
• Detects shaft runout and eccentricity.
• DC resistance check confirms cable integrity.
• Works with Bently Nevada trend analysis software.

Frequently Asked Questions (FAQ)

• Question: Why must I use a 5 meter Proximitor Sensor with this probe?

  Answer: The probe and sensor are calibrated as a pair. Mismatched lengths cause errors.

• Question: What is reverse mount? How is it different?

  Answer: The cable exits from the back. This fits shallow mounting holes.

• Question: Can I use this probe in Zone 0 hazardous areas?

  Answer: Yes with intrinsic safety barriers per drawing 141092.

• Question: What happens if I tighten the connector past 0.565 N•m?

  Answer: You may break the ClickLoc connector. Finger tight is enough.

• Question: Is the probe pressure tested before shipping?

  Answer: No. Contact us if your application requires a pressure seal test.

Experience-based Q&A (Field Notes)

• Question: My reading is unstable. What should I check first?

  Answer: Verify you use a 5 meter Proximitor Sensor. Wrong sensor gives bad data.

• Question: The cable is too long. Can I cut and splice it?

  Answer: No. Cutting changes resistance and calibration. Order correct length.

• Question: We see noise at 60 Hz. How to fix?

  Answer: Route cable away from power lines. Use shielded cable and proper grounding.

• Question: Does cold temperature really damage the pressure seal?

  Answer: Yes. Below -34°C the Viton O-ring may crack. Keep within limits.

Buying Guide – Choose the Right Reverse Mount Probe

• Choose 330705-02-18-50-00-00 for 3/8-24 UNF threads and 5 meter cable.
• Need shorter cable? Pick 1 meter option (total length code 10).
• For armored cable, select armor option at beginning of part number.
• Remember: You must buy the matching 5 meter Proximitor Sensor separately.
• Hazardous area? Ensure you order barriers per drawing 141092 or 140979.
• Contact us for custom pressure testing before shipment.

Need Help? Contact Us

• Technical support or quote requests:
  +86 158 8020 0923 (WhatsApp)
• Email: sales@plcdcshub.com – reply within 24 hours.
• Pre-sales consulting, datasheets, and RMA support available.

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