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The Bently Nevada 330101-00-12-20-02-05, also cataloged as the 330101 Proximity Sensors, operates as a dedicated hardware component for non-contact relative shaft position and dynamic vibration measurement within 3300 XL Transducer System platforms. It projects a high-frequency radio frequency magnetic field through its polyphenylene sulfide tip to track physical gaps relative to rotating shaft target surfaces.

Suffix Breakdown & Model Matrix

Option Code Designation Parameter Value / Option Description
330101 Base Model 3300 XL 8 mm Proximity Probe, 3/8-24 UNF thread
-00 Unthreaded Length Option 0.0 in
-12 Overall Case Length Option 1.2 in (12 x 0.1 in)
-20 Total Length Option 2.0 meters (6.6 feet)
-02 Connector and Cable Type Option Miniature coaxial ClickLoc connector, standard cable
-05 Agency Approval Option Multiple Approvals (CSA, ATEX, IECEx)

Hardware Specifications

Parameter Specification
Model 330101-00-12-20-02-05
Base Model 330101
Brand Bently Nevada
Series 3300 XL 8 mm
Product Type Proximity Sensors
Origin USA
Case Geometry & Threading 3/8-24 UNF thread, 1.2 in overall case length, 0.0 in unthreaded length
Probe Case Material AISI 303 or 304 stainless steel (SST)
Probe Tip Material Polyphenylene sulfide (PPS)
Total Cable Length 2.0 meters (6.6 feet)
Connector & Cable Type Miniature coaxial ClickLoc connector, standard cable
Agency Approvals Multiple Approvals (CSA, ATEX, IECEx) (-05 option)
Operating Temp -51 to +177 deg C (Standard probe operational envelope)
Power Consumption Passive physical component (0 W)
Dimensions Standard 8 mm probe tip diameter, 1.2 in case length
Weight 0.323 kg (Net Weight) / 1.3 kg (Shipping Weight)

Eddy-Current Probe Scaling & Rotor Dynamics

The 330101-00-12-20-02-05 probe operates alongside a matching extension cable and Proximitor sensor to maintain consistent eddy-current probe scaling at a linear sensitivity of 7.87 V/mm (200 mV/mil). During mechanical installation, executing gap voltage validation targeting -10 VDC at nominal shaft centerline establishes the center of the probe linear range. This setup provides maximum dynamic clearance for peak-to-peak vibration excursions while maintaining cross-talk suppression between orthogonal probe pairs installed for rotor dynamics monitoring.

Frequently Asked Questions

Q: What extension cable is needed for a 2.0-meter probe in a 5.0-meter system configuration?

A: A 2.0-meter probe (-20 option) requires a matching 3.0-meter extension cable to achieve the required 5.0-meter overall electrical system length calibrated to the Proximitor sensor.

Q: What certification does the -05 agency approval option cover?

A: Option -05 provides multi-agency hazardous location certifications, including CSA, ATEX, and IECEx approvals for intrinsically safe installations.

Q: How does the ClickLoc connector prevent physical loosening during operation?

A: The ClickLoc miniature coaxial connector features a spring-loaded friction mechanism that snaps securely onto the mating connector, preventing disconnection from machine vibration.

Field Installation Guidelines

  1. Inspect and clean the 3/8-24 UNF threaded mounting bore to ensure it is free of metal shavings and thread damage.
  2. Thread the 1.2-inch probe body into the mounting hole by hand until the tip approaches the target shaft face.
  3. Supply power to the associated 3300 XL Proximitor sensor and monitor the DC gap voltage; adjust probe insertion depth to achieve the target -10 VDC baseline at physical shaft center.
  4. Torque the external locknut against the mounting surface to secure physical position without imparting rotational twist on the coaxial cable lead.
  5. Connect the miniature coaxial ClickLoc connector to the extension cable and install a connector protector boot over the joint to isolate the coaxial shield from earth ground loops.

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