Product Overview

The Bently Nevada 330901-16-24-10-02-05 is a high-performance 8 mm proximity probe designed specifically for the 3300 XL NSv (Near-field/Small-vibration) transducer system. This probe represents the industry gold standard for monitoring the vibration and position of small-shaft and high-speed machinery where traditional 8 mm probes may encounter limitations. As a critical component in predictive maintenance and machinery protection, this unit provides non-contact, precise displacement measurements that are vital for ensuring the longevity of high-value rotating assets.

Engineered with advanced eddy-current technology, the 330901 probe is optimized for tight spaces and short-range applications. It excels in environments where sensor clearance is restricted or where the target diameter is significantly smaller than the standard 8 mm sensor footprint. By converting shaft displacement into a highly accurate linear voltage signal, the system allows for the detection of minute mechanical anomalies—such as excessive shaft orbit, bearing wear, or thermal expansion—before they escalate into catastrophic failures. For reliability engineers and instrumentation technicians, this probe ensures that every micron of shaft movement is captured with the precision required for enterprise-grade 3500 series monitoring racks.

Technical Specifications

Model Configuration Explanation

The 330901-16-24-10-02-05 model nomenclature is structured to define the mechanical configuration:

• 330901: Base model for the 3300 XL NSv 8 mm Proximity Probe.

• 16: Unthreaded length configuration (160 mm).

• 24: Total case length (240 mm).

• 10: Thread size (3/8-24 UNF-2A) for standard mounting applications.

• 02: Total cable length (1.0 meter integral).

• 05: Agency Approval/Certification level (standard for global hazardous locations).

Typical Applications

The 330901 series is favored by industries where shaft space is at a premium:

• Small Centrifugal Compressors: Monitoring radial vibration on high-speed small-diameter rotors.

• Precision Machine Tools: Tracking spindle displacement to ensure manufacturing tolerances.

• High-Speed Turbines: Detecting rotor behavior in compact, high-RPM auxiliary turbines.

• Research and Development: Used in test stands for monitoring prototype shaft assemblies.

• Predictive Maintenance: Feeding real-time data to Bently Nevada 3500 Monitoring Racks and System 1 diagnostic software.

System Compatibility

This probe is exclusively designed for the 3300 XL NSv transducer platform. It must be paired with the matching NSv Proximitor sensor and extension cable. Attempting to use this probe with standard 3300 XL (non-NSv) Proximitors will lead to significant measurement nonlinearity. It is fully integrated with the 3500 Machinery Protection System, allowing for seamless data transmission to HMI or SCADA networks for total plant monitoring.

Installation Guidelines

• Calibration: Always perform a bench-top gap verification before installation to ensure the output voltage aligns with the Proximitor’s requirement (typically -1.25V).

• Spacing: Mount the probe at the specified gap distance from the target. Maintain proper lateral spacing from other sensors to prevent cross-talk interference.

• Routing: Keep signal cables separated from AC power lines or high-voltage cabling to prevent signal noise. Always use dedicated conduit.

• Protection: Ensure the probe tip is not scratched or dented during the installation process, as the sensitive internal coil can be affected.

• Grounding: Secure the probe case to a rigid, grounded machine housing to ensure an effective electrical reference.

Product Advantages

• Optimized for Small Targets: Unlike standard sensors, the NSv configuration is refined to maintain linearity even when the shaft target diameter is relatively small.

• Rugged Reliability: The stainless steel housing and fluoropolymer cable provide high resistance to harsh factory contaminants, including oil, high humidity, and heat.

• Enhanced Diagnostics: Delivers ultra-accurate displacement data that allows for early detection of shaft centerline migration.

• Interchangeability: As part of the globally standardized 3300 XL platform, replacement components are readily available, ensuring system uptime.

Ordering Information

• Model: 330901-16-24-10-02-05.

• Standard package includes the probe, protective dust cap, and installation manual.

• Note: Confirm your system total length requirements (5m or 9m) as the NSv system components must be ordered as a matched, calibrated set.

Frequently Asked Questions

• Why is the NSv series different from the standard 3300 XL?

  The NSv (Near-field/Small-vibration) series is tuned for applications with shorter linear ranges and smaller targets, whereas the standard 3300 XL is optimized for larger shafts.

• Can I use this with a standard Proximitor?

  No, the 330901 probe is specifically tuned for the NSv Proximitor sensor. Using it with a standard Proximitor will cause the output signal to be non-linear.

• How do I identify if the probe cable is damaged?

  Perform a resistance check. A high or open resistance reading across the coaxial center conductor usually indicates a broken internal wire.

• Does the probe require an external power supply?

  No, the probe is passive. Power is supplied through the Proximitor sensor, which acts as the oscillator for the transducer system.

• Is the probe tip replaceable?

  No, the tip is permanently attached. Any mechanical damage to the tip requires replacing the entire probe assembly to guarantee calibration accuracy.

• How should I clean the probe tip?

  Use a lint-free cloth and a mild solvent if necessary. Avoid abrasive materials that could scratch the epoxy coating on the probe face.

• Can it be used for underwater applications?

  It is designed for industrial oil/gas environments. For continuous underwater submersion, specialized housings are required to prevent moisture ingress.

• Why do I need to check shaft "runout"?

  Electrical runout can create a false signal. Ensure the shaft surface is polished and not magnetized to get a clean, baseline reading.

• Is the ClickLoc connector waterproof?

  It is weather-resistant. In wet outdoor locations, always house the connection in a junction box rated for your specific area classification.

• How often should I calibrate the system?

  Calibration verification is recommended during initial commissioning and during major machinery turnarounds or component replacements.