330905-05-13-05-12-00 3300 NSv Proximity Sensor by Bently Nevada

Executive Engineering Overview

Engineered for high-precision radial vibration and axial position measurement on specialized machinery, the Bently Nevada 3300 NSv series 330905-05-13-05-12-00 proximity probe delivers exceptional linear range performance in confined spaces. Featuring an M10x1 thread profile and robust PPS tip material, this sensor is designed to handle harsh chemical process environments and small-diameter shafts where standard probes fall short. It ensures superior side-view characteristics and reliable signal integrity across a 0 to 10 kHz frequency response.

Model 330905 Configuration Breakdown

• Base Model: 330905 3300 NSv Proximity Probe
• Unthreaded Length Option (-05): 50 mm unthreaded case extension
• Overall Case Length Option (-13): 130 mm total case length
• Total Length Option (-05): 0.5 meter (20 in) cable length
• Connector & Cable Type (-12): Miniature coaxial ClickLoc connector with FluidLoc cable
• Agency Approval Option (-00): Not required / standard commercial grade

Technical Specifications & Electrical Parameters

• Manufacturer & Series: Bently Nevada 3300 NSv Series
• Model Identification: 330905-05-13-05-12-00
• Linear Range: 1.5 mm (60 mils), spanning from 0.25 to 1.75 mm (10 to 70 mils) from target
• Recommended Gap Setting: 1.0 mm (40 mils) for optimal linearity
• Incremental Scale Factor (ISF): 7.87 V/mm (200 mV/mil) ±12.5%/-20%
• Probe DC Resistance: 4.0 ± 0.5 ohms center conductor to outer conductor
• Frequency Response: 0 to 10 kHz (+0, -3 dB typical) with up to 305 meters of field wiring
• Environmental Limits: Operating & storage temperature range of -52°C to +177°C (-62°F to +351°F)

Mechanical Installation & Deployment Protocol

• Thread the M10x1 probe case into the machinery mounting hole, observing a maximum thread engagement length of 15 mm.
• Tighten the probe case using finger-tight methods initially, ensuring final torque does not exceed 0.56 N•m (5 in•lb) to prevent housing distortion.
• Maintain a minimum bend radius of 25.4 mm (1.0 in) on the 75 Ω FEP-insulated coaxial cable during routing.
• Connect the miniature coaxial ClickLoc connector securely to the extension cable, avoiding excessive lateral pulling force.
• Use three-conductor shielded triad field wiring up to 305 meters to link the Proximitor sensor to the monitoring system.

Commissioning, Diagnostics & Sealing Integrity

• Verify the static gap voltage using a digital multimeter, aiming for approximately -10 Vdc corresponding to the 1.0 mm recommended gap setting.
• Inspect the Viton O-ring seal at the probe tip to ensure proper differential pressure containment between the probe tip and case.
• Check signal output stability on your monitoring system rack to confirm freedom from high-frequency electromagnetic noise or ground loops.
• Monitor deviation from best fit straight line (DSL), which remains less than ±0.06 mm (±2.3 mils) over the linear range.
• Inspect connector interfaces periodically for contamination or moisture ingress in harsh process environments.

Target Equipment & Application Scenarios

• Equipment Compatibility: High-speed centrifugal compressors, small-diameter turbines, specialized pumps, and reciprocating machinery.
• Application Environments: Petrochemical plants, chemical processing units, and oil & gas compression skids requiring accurate vibration analysis on restricted-clearance shafts.

Logistics, Fulfillment & Warranty Terms

• Dispatch Window: Fast global order handling and fulfillment within 24-48 hours.
• Global Carriers: Expedited international shipping via FedEx, UPS, and DHL.
• Warranty Assurance: Protected by a full 12-month factory warranty.

Global PLC Spare HUB's Insight

When gapping proximity probes on small-diameter shafts below 13 mm, side-view interference can distort vibration readings if standard probes are used. At Global PLC Spare HUB, we find that deploying the 330905-05-13-05-12-00 NSv probe solves this because its specialized tip design minimizes side sensitivity. When installing in pressurized compressor casings, always verify that the Viton O-ring seal is properly seated to prevent process gas leakage along the probe body.

Selection & Model Comparison Guidance

When engineering replacement sensor loops, matching cable lengths and unthreaded case dimensions is critical for physical fit. For comparison, evaluating this unit against the alternative model 330905-00-13-10-02-05 reveals key mechanical differences: while both share the 130 mm overall case length (-13), the alternative model features zero unthreaded length (-00), a longer 1.0-meter cable (-10), connector protector options (-02), and agency approvals included (-05). Select the unthreaded and cable length options that precisely align with your mounting bracket thickness and distance to the Proximitor sensor.

Professional Frequently Asked Questions

What is the primary advantage of the 3300 NSv probe over standard proximity probes on small shafts?

The NSv design provides superior side-view characteristics and reduced sensitivity when measuring axial position or vibration on shaft diameters smaller than 13 mm (0.5 in).

Why is maintaining the recommended 1.0 mm gap setting important for the 330905-05-13-05-12-00?

A 1.0 mm gap centers the probe operating point precisely within its 1.5 mm linear range, ensuring linear voltage output corresponding to the 200 mV/mil scale factor.

How does the FluidLoc cable construction benefit industrial installations?

The FluidLoc cable design incorporates internal barriers that prevent oil and process fluids from wicking through the cable core toward the connector and Proximitor sensor.

What torque limits should technicians observe when securing the M10x1 probe case?

Technicians must not exceed the maximum torque limit of 0.56 N•m (5 in•lb) to avoid internal mechanical strain or thread damage on the probe assembly.

Are 3300 NSv probes pressure-tested by the factory prior to shipment?

Standard probes are designed with a Viton O-ring to seal differential pressure but are not pressure-tested before shipping unless specifically requested through custom design orders.

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