Product Overview

The Bently Nevada 330101-00-84-20-02-05 3300 XL 8mm Proximity Probe provides the critical data foundation for heavy-duty machinery protection systems. Engineered to operate under the most strenuous industrial conditions, this non-contacting sensor delivers unmatched precision in measuring radial vibration, shaft position, and speed. It serves as a definitive solution for monitoring high-speed turbines, compressors, and motors where unplanned downtime is not an option.

This probe integrates seamlessly with the Bently Nevada 3500 Monitoring System, translating mechanical shaft movement into high-fidelity electrical signals with a standard scale factor of 200 mV/mil. By utilizing advanced eddy current technology, the 3300 XL series ensures maximum linearity and thermal stability, allowing operators to detect bearing wear or rotor instability before they escalate into catastrophic failures. Its rugged design specifically targets the harsh, oil-saturated environments found in petrochemical and power generation plants.

Physical Configuration & Suffix Logic

330101-00-84-20-02-05 Hardware Definition

The specific suffix codes for this 330101 model determine the physical dimensions and cable architecture required for precise field installation.

Unthreaded Length (-00)

This designates a 0.0-inch unthreaded length. The entire probe case is threaded, providing maximum flexibility when securing the probe through a housing or bracket where every millimeter of adjustment is vital.

Overall Case Length (-84)

The -84 suffix specifies an overall case length of 8.4 inches. This extended length allows the probe to reach deep into bearing housings or internal machine cavities where standard-length probes cannot penetrate.

Total Length (-20)

This indicates a total probe length of 2.0 meters (approximately 6.6 feet). This length is integral for establishing the correct electrical tuned circuit when paired with the corresponding extension cable and Proximitor sensor.

Connector & Protection (-02)

The -02 option includes a miniature coaxial connector paired with a factory-installed connector protector. This combination prevents fluid ingress and oxidation at the signal junction, maintaining impedance integrity over time.

Agency Approval (-05)

This suffix confirms Multiple Approvals (ATEX, IECEx, CSA). It authorizes the probe for use in Zone 0 and Class I, Div 1 environments, ensuring full compliance with international safety standards for explosive atmospheres.

Technical Hardware Parameters

Precision Commissioning Guide

Proper Gap Voltage Setting

During installation, adjust the probe position to achieve a quiescent gap voltage of -10.00 VDC at the Proximitor output. This ensures the shaft is positioned at the center of the sensor's linear range. Use a calibrated digital multimeter and verify the target material is AISI 4140 steel for factory-accurate scaling.

Connector Moisture Protection

The connector protector is a mandatory field component. Slide the protector over the junction once the coaxial connectors are finger-tightened. In oil-mist environments, this prevents the accumulation of conductive fluids that could otherwise degrade the signal-to-noise ratio and trigger nuisance alarms.

Minimum Bend Radius

Strictly observe a minimum bend radius of 25.4 mm (1.0 inch) for the lead cable. Crimping or sharp bends permanently alter the coaxial impedance, leading to "false" vibration spikes or attenuation of high-frequency data in your DCS or 3500 rack.

Operational Durability & System Synergy

Unmatched Thermal Resilience

The 3300 XL 8mm probe utilizes a patented tip-to-case bonding process that resists the "probe swelling" often seen in inferior sensors during high-temperature cycling. This ensures the sensor maintains a constant DC gap throughout the machine's thermal expansion phases.

Seamless Plant Integration

This probe acts as the primary sensory input for Turbine Supervisory Instrumentation (TSI). The signal interfaces directly with Bently Nevada 3500/42M monitors and can be mirrored to Honeywell Experion PKS or Siemens PCS7 systems for advanced diagnostic trending and spectral analysis.

Chemical & Pressure Resistance

The probe tip is constructed from high-grade Polyphenylene Sulfide (PPS), providing robust immunity to synthetic lubricants and caustic process gases. The case and internal seals are designed to withstand high-pressure bearing housings without leakage.

Global Fulfillment & Logistics

Accelerated Dispatch Profile

We guarantee shipping within 3-5 days when payment finish. Our logistics team utilizes premium carriers including DHL, FEDEX, and UPS to ensure that critical machine spares arrive at your site with minimal lead time.

Industrial-Grade Protection

Every order is dispatched in New Original Pack condition with specialized anti-static industrial packaging. We employ vacuum-sealed moisture barriers and double-walled secondary boxes to protect the precision-machined threads and sensitive 2m cable lead during international transit.

Expert Technical Support

Q1: Why is the -84 case length used instead of standard sizes?

A1: The 8.4-inch case is designed for machines with thick-walled bearing housings or where the probe must be mounted through a deep outer casing to reach the shaft surface.

Q2: Can I cut the 2.0m cable to make it shorter?

A2: Absolutely not. The cable length is a precisely tuned electrical component. Cutting the cable will change the impedance and resonant frequency, making the probe incompatible with the Proximitor and voiding calibration.

Q3: How do I identify a 330101 probe vs a 330102?

A3: The 330101 uses standard 3/8-24 threads, whereas the 330102 uses metric M10 x 1 threads. Always verify the mounting bracket thread pitch before installation.

Q4: Is the -05 approval necessary if my site is non-hazardous?

A4: While not physically required for operation, stocking -05 approved probes allows for inventory standardization across all areas of a plant, ensuring safety compliance regardless of the specific mounting location.