330907-05-30-10-02-00 Bently Nevada 3300 NSv Reverse Mount Sensor

Product Executive Overview

The Bently Nevada 330907-05-30-10-02-00 belongs to the high-precision 3300 NSv Series non-contact eddy current transducer family. Machine protection engineers specify this reverse mount probe for tight clearance areas on centrifugal gas compressors, refrigeration units, and small-shaft machinery.

This design utilizes reverse mounting through bearing housings to simplify outer casing access. The probe tip features polyphenylene sulfide material, which provides chemical resistance against harsh process gas contaminants.

Gold-plated ClickLoc connectors ensure vibration-proof coaxial locking. Mechanical construction includes patented TipLoc molding and an internal Viton O-ring seal that prevents process fluid egress through the probe body.

Global PLC Spare HUB Insight & Field Engineering Review

Our field reliability specialists frequently deploy the Bently Nevada 330907-05-30-10-02-00 in high-density turbomachinery monitoring projects. Standard 8 mm probes often suffer from side-view interference or counterbore restrictions on target shafts under 51 mm in diameter. The 3300 NSv Series eliminates side-wall signal distortion in narrow bearing cavities.

During a field retrofit on a multi-stage refrigeration compressor, technicians replaced degraded legacy 3000-series probes with the 330907-05-30-10-02-00 sensor. The M10x1 thread engagement allowed precise back-gap setting from outside the casing, cutting commissioning time by half while maintaining continuous -1 to -13 VDC gap voltage stability.

Configuration Breakdown (Part Number Hierarchy)

• 330907 — Product Series: 3300 NSv Reverse Mount Probe
•   └── 05 — Unthreaded Length Option: 0.5 inches
•       └── 30 — Case Length Option: 3.0 inches (M10x1 metric threads)
•           └── 10 — Total Cable Length: 1.0 meter (39 inches)
•               └── 02 — Connector Option: Miniature coaxial ClickLoc connector, standard cable
•                   └── 00 — Agency Approval Option: Standard / Not required

Technical Parameters & Operating Limits

• Manufacturer: Bently Nevada
• Model Number: 330907-05-30-10-02-00
• System Type: 3300 NSv Proximity Transducer System
• Thread Size: Metric M10x1
• Linear Range: 1.5 mm (60 mils), spanning -1 Vdc to -13 Vdc output
• Recommended Gap Setting: 1.0 mm (40 mils) / ~ -9.0 Vdc bias
• DC Resistance (RPROBE): 4.2 ± 0.5 Ohms
• Probe Tip Material: Polyphenylene Sulfide (PPS)
• Case Material: AISI 304 Stainless Steel (SST)
• Maximum Case Torque: 22.6 N·m (200 in·lb) | Recommended: 7.5 N·m (66 in·lb)
• Operating & Storage Temperature: -52°C to +177°C (-62°F to +351°F)
• Maximum Thread Engagement: 15 mm
• Field Wiring Cable Spec: 0.2 to 1.5 mm² (16 to 24 AWG) shielded triad cable up to 305 meters

Selection Comparison & Engineering Advice

Engineering Advice: Choose the 330907-05-30-10-02-00 when connecting through an internal junction box using a separate extension cable. If your installation runs directly to an externally mounted Proximitor sensor in an explosion-proof zone, select the 330907-05-30-70-02-05 model instead to meet hazardous area compliance.

Application Scenarios & Machinery Diagnostics

• Radial shaft vibration monitoring on fluid-film bearings with shafts smaller than 51 mm (2 inches).
• Axial thrust position measurement on flat target areas smaller than 15 mm (0.6 inches).
• Keyphasor speed detection and phase angle timing on tight process gas expanders.
• Early detection of journal bearing clearance wear, shaft misalignment, and oil whirl phenomena.

Installation, Maintenance & Logistics Terms

Position the probe tip to achieve a 1.0 mm (40 mil) physical gap setting during mechanical installation. Use a calibrated multimeter to confirm target output voltage reads approximately -9.0 VDC at mid-scale linear center.

Apply liquid thread sealant conservatively to prevent process gas leakage across the bearing housing wall. Never exceed the 22.6 N·m maximum torque rating on the M10x1 threads during final locknut tightening.

Packaging List: 1 x Bently Nevada 330907-05-30-10-02-00 Probe, complete with protective connector cap and calibration sheet.

Logistics & Delivery: We ship worldwide via express couriers including FedEx, UPS, and DHL. Stock orders dispatch within 24 to 48 hours after payment confirmation.

Warranty Terms: Supported by a full 12-month operational warranty covering factory material defects under normal operating conditions.

Frequently Asked Questions & Field Engineering Guidance

Q1: What makes the reverse mount probe configuration different from a standard thread probe?

A1: Reverse mount probes install from inside the bearing casing outward. This design allows technicians to replace or adjust the sensor without dismantling outer machine covers in constrained machinery spaces.

Q2: Can I connect this 1.0-meter probe directly to a 5.0-meter 3300 XL NSv Proximitor Sensor?

A2: No, you must install a matching 4.0-meter extension cable between them. The total system length must equal 5.0 meters to achieve the 7.87 V/mm (200 mV/mil) scale factor accuracy.

Q3: Why is my measured DC resistance reading 4.2 Ohms instead of the standard 8.7 Ohms found on 8 mm probes?

A3: The 3300 NSv Series uses smaller physical coil dimensions optimized for small targets. A baseline value of 4.2 ± 0.5 Ohms indicates correct electrical continuity for a 1.0-meter NSv probe cable.

Q4: What happens if sub-zero operating temperatures fall below -34°C (-30°F)?

A4: Continuous operation below -34°C does not damage the sensing element itself, but it can degrade the flexible Viton O-ring seal and cause pressure leaks over extended periods.

Q5: How do I select between M10x1 metric threads and 3/8-24 imperial threads during replacement?

A5: Check the existing machine tapping threads carefully. The 330907 model designates metric M10x1 threading, whereas model number 330906 designates imperial 3/8-24 UNF threading.

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