Description

Bently Nevada 330930-65-05-00 is a 3300 NSv extension cable configured for industrial displacement monitoring where physical clearances are limited and small shaft target geometries are present. This cable has an active length of 6.5 meters (21.3 feet) and is constructed with protective stainless steel armor without an outer FEP jacket, featuring a pre-installed connector protector at the probe-to-cable joint. It acts as the signal transmission link within a 7.0-meter 3300 XL NSv proximity transducer system, connecting a 0.5-meter 3300 NSv proximity probe to a 3300 XL NSv Proximitor Sensor.

The rugged armored construction on this variant provides mechanical guarding against abrasion, pinching, and impact forces in tight machinery casing environments, while omitting the outer polymer FEP jacket to reduce the cable outer diameter and comply with specific chemical or weight constraints. The integrated connector protector prevents liquids, lubricating oils, and moisture from contaminating the gold-plated coaxial ClickLoc joint, maintaining clean signal transmission over long operating cycles. This specific configuration is supplied under Option 00 (approvals not required) and is designed for general-purpose, non-hazardous industrial areas.

Features

• 6.5-meter length option establishes a complete 7.0-meter transducer measurement chain when mated with a 0.5-meter proximity probe.
• Flexible stainless steel armor provides heavy physical protection against mechanical wear without the added bulk of an FEP jacket.
• Integrated connector protector shields the delicate coaxial junction against process lubricants, moisture, and debris.
• Gold-plated brass ClickLoc coaxial connectors secure connections with a positive locking mechanism to prevent loosening from machine vibration.
• Proprietary CableLoc design provides robust pull strength to prevent accidental separation of the probe-to-cable connection.

Applications

This extension cable is used in critical rotating machinery applications requiring compact eddy-current displacement measurements:

• Centrifugal and axial industrial compressors with limited internal mounting space.
• Aeroderivative gas turbines and high-speed turbomachinery with small target areas.
• Small-bore pump shafts and tight-clearance radial vibration measurement paths.
• General-purpose industrial machinery installations where hazardous area approvals are not required.

Ordering Information

The 330930-65-05-00 part number represents the following configuration options defined by Bently Nevada:

Technical Specifications

Installation Guidelines

Proper field installation ensures low signal-to-noise ratios and consistent transducer measurements:

• Always verify that the sum of the probe length and extension cable length matches the calibration length of the Proximitor Sensor (7.0 meters in this configuration).
• Observe the minimum bend radius of 25.4 mm (1.0 inch) when routing the armored cable through conduit or machinery casings to prevent coaxial core damage.
• Ensure the connector protector is fully seated over the probe-to-cable ClickLoc junction to prevent chemical or lubricant ingress.
• Use silicone self-fusing tape (such as Bently Nevada part 03200006) for extra protection if the connector protector is exposed to extreme environments (note that tape is not recommended inside machinery casings exposed directly to hot turbine oil).
• Secure the armored cable at regular intervals using appropriate clips or mounting blocks to prevent whip or mechanical wear during high-vibration operation.