Product Overview

The Bently Nevada 330901-04-35-50-01-00 belongs to the 3300 NSv (Near Surface video) series, specifically engineered for applications where space constraints or small shaft diameters restrict the use of standard proximity probes. This transducer system excels in monitoring centrifugal air compressors, refrigeration compressors, and high-speed turbines where tight installation tolerances are mandatory.

By utilizing advanced eddy current technology, the 3300 NSv provides high-resolution vibration and position data to the 3500 Machinery Protection System. Its robust design ensures reliable performance in harsh industrial environments characterized by high temperatures and lubricating fluid exposure. This probe acts as a critical link in your Turbine Supervisory Instrumentation (TSI) strategy, delivering the precise gap and vibration signals necessary to prevent catastrophic mechanical failure and optimize maintenance cycles.

Part Number Configuration Matrix

The suffix codes define the specific physical and electrical characteristics of this 3300 NSv probe:

330901 [Model Number]

3300 NSv Proximity Probe, 1/4-28 UNF thread, without armor.

-04 [Unthreaded Length Option]

Defines a 0.4-inch unthreaded length on the probe case, allowing for specific mounting depth adjustments within the machine housing.

-35 [Overall Case Length Option]

Indicates a 3.5-inch total case length, providing the necessary reach through bearing housings or brackets to access the target shaft surface.

-50 [Total Length Option]

Specifies a 5.0-meter (16.4 feet) total system length. This length must be matched with the corresponding 5.0m Proximitor Sensor to maintain calibration accuracy.

-01 [Connector Option]

Equipped with a miniature coaxial click-loc connector. This design prevents accidental disconnection while maintaining signal integrity.

-00 [Agency Approval Option]

Standard configuration without specific hazardous area approvals, suitable for general-purpose industrial environments.

Performance Specifications

Field Installation Requirements

Precision is paramount when installing the 330901-04-35-50-01-00. Engineers must set the initial gap voltage—typically -9.0 VDC to -10.0 VDC for a centered linear range—using a high-impedance multimeter connected to the Proximitor output.

Ensure the probe tip has a minimum side clearance of 7.6 mm (0.3 in) from any surrounding metal to avoid "side-viewing" interference which compromises data accuracy. During cable routing, maintain a minimum bend radius of 25.4 mm (1.0 in). Avoid over-tightening the mounting nuts to prevent case deformation; use a calibrated torque wrench to meet Bently Nevada’s mechanical installation standards.

Strategic Industrial Integration

The 3300 NSv series bridges the gap between small-scale machinery and enterprise-level monitoring. Its seamless integration with the Bently Nevada 3500/42M Proximitor/Seismic Monitor ensures that vibration data is digitized and transmitted via Modbus or Ethernet/IP to your Honeywell Experion or Siemens PCS7 host system.

Designed for high-fluid-flow environments, the probe's Polyphenylene Sulfide (PPS) tip resists chemical degradation from synthetic lubricants. This durability ensures long-term stability in "hot-end" turbine applications where standard sensors often drift or fail due to thermal cycling.

Logistics and Global Fulfillment

We prioritize the integrity of your instrumentation through rigorous handling protocols:

Delivery Timeline: Orders typically ship within 3-5 business days following payment confirmation.

Global Logistics: Rapid transit via DHL Express, FedEx International Priority, or UPS Worldwide Saver.

Protective Packaging: All probes are shipped in specialized anti-static ESD shielding and high-density foam cushioning to prevent ceramic tip damage or cable kinking during air freight.

Documentation: Each shipment includes a Certificate of Conformance and factory calibration data upon request.

Critical Application FAQs

Q1: Can I use this 5.0m probe with a 7.0m or 9.0m Proximitor?

A1: No. The 3300 NSv system is length-dependent. The 330901-04-35-50-01-00 (5.0m) must be paired exclusively with a 5.0m Proximitor Sensor to maintain the calibrated 200 mV/mil scale factor.

Q2: What is the significance of the "NSv" designation compared to standard 3300 XL probes?

A2: NSv stands for "Near Surface video." These probes utilize a smaller tip diameter (5mm) and a different frequency response, making them ideal for targets smaller than 9.5mm (0.375 in), such as small shafts or flat surfaces with limited area.

Q3: How do I verify if the probe is functioning correctly before installation?

A3: Perform a bench-loop check using a micrometer spindle. Verify the voltage change across the 1.0mm linear range. The output should consistently reflect 7.87 V/mm; any significant deviation indicates potential cable damage or internal coil failure.