Description

The Bently Nevada 330101-30-60-05-01-05 is a specialized configuration of the 3300 XL 8 mm proximity probe system, engineered for non-contact machinery protection. This specific variant features a 3.0-inch unthreaded length (Option 30) and a 6.0-inch overall case length (Option 60) with standard 3/8-24 UNF threads, designed for threaded-mount applications where deep housing penetration is required. It is supplied in an ultra-short 0.5-meter (1.6 feet) total length (Option 05) to interface cleanly with nearby junction boxes or extension cables, eliminating excess cable slack. This probe is equipped with a miniature coaxial ClickLoc connector with a pre-installed connector protector on a standard non-armored cable (Option 01). It is fully approved with CSA, ATEX, and IECEx hazardous area approvals (Option 05), making it suitable for volatile environments in refinery, petrochemical, and power generation operations.

The probe functions as part of the 3300 XL 8 mm transducer system, working in conjunction with a 330180 series Proximitor sensor and a compatible extension cable. This system operates on the eddy-current principle to measure shaft dynamic vibration, axial position, and speed on critical rotating machinery. By establishing a high-frequency electromagnetic field at the 8 mm tip, the transducer monitors changes in the gap distance between the probe and the target material (typically AISI 4140 steel) with exceptional precision. The resulting voltage output provides direct indication of rotor displacement to PLC, DCS, or Bently Nevada 3500 monitoring systems, ensuring immediate protection against catastrophic machinery failures.

Features

• Specific Case Configuration: Designed with a 3.0-inch unthreaded section and a 6.0-inch overall threaded case length (3/8-24 UNF threads) without mechanical armor.
• Ultra-Short Total Length: 0.5-meter (1.6 feet) total probe length minimizes local cable loop clutter and provides a direct path to the extension cable connection.
• ClickLoc Connector with Protector: Features a gold-plated miniature coaxial ClickLoc connector coupled with a robust connector protector to prevent ingress of moisture and contaminants.
• High-Accuracy Eddy Current Sensing: Provides reliable, high-resolution non-contact displacement measurement with an Incremental Scale Factor (ISF) of 7.87 V/mm (200 mV/mil) nominal when combined with standard 3300 XL components.
• Hazardous Area Certified: Fully approved under ATEX, IECEx, and CSA standards (Option 05) for deployment in zone-classified industrial areas.
• Rugged Build: Equipped with a polyphenylene sulfide (PPS) tip material and a stainless steel probe body to withstand extreme vibration and harsh chemical exposure.

Applications

Typical applications include:

• Rotor dynamic vibration monitoring on high-speed steam and gas turbines.
• Shaft axial position and thrust displacement measurements in large industrial compressors.
• Radial vibration and speed sensing on critical cooling water pumps and turbomachinery.
• Hydroelectric generator shaft alignment and bearing clearance tracking.
• Permanent mounting inside bearing housings and machine casings for heavy-industry machinery protection.

Ordering Information

Technical Specifications

Installation Guidelines

Proper installation is critical to ensure accurate vibration readings and prevent probe damage:

• Probe Gap Setting: Mount the probe with the appropriate gap per system calibration, typically targeted at -9 Vdc (approximately 1.27 mm or 50 mils) for radial vibration monitoring.
• Cable Routing: Always route the probe cable away from high-voltage lines or sources of electromagnetic interference. Use appropriate shielding and grounding procedures for the transducer chain.
• Minimum Unthreaded Length Verification: Ensure that the unthreaded portion (3.0 inches) of the probe does not contact or bind during insertion. The unthreaded length must be at least 0.8 inches less than the overall case length.
• Thread Engagement Limits: For standard 3/8-24 UNF threads, the maximum length of thread engagement should not exceed 0.563 inches to prevent binding.
• Connector Handling: The ClickLoc connector is designed for finger-tight connection. Do not over-torque when joining the probe and extension cables. The integrated connector protector protects against fluid and particulate entry.

Compliance and Certifications

When configured with Option 05, this probe is certified for hazardous areas under global explosion protection frameworks:

• ATEX/IECEx: Intrinsically safe (Ex ia IIC T5...T1 Ga) and non-sparking/increased safety (Ex nA IIC, Ex ec IIC T5...T1 Gc) when connected to compatible Bently Nevada safety barrier and Proximitor systems.
• CSA: Approved for Class I, Division 1/2, Groups A, B, C, and D hazardous environments.