Description
Bently Nevada 330906-02-12-10-02-00
Technical Specifications
- Base Model: 330906, 3300 NSv Reverse Mount Probe with 3/8-24 UNF thread, without armor
- Unthreaded Length: 2 mm
- Overall Case Length: 120 mm
- Total Probe Length: 1.0 meter (39 inches)
- Connector Type: Miniature coaxial ClickLoc connector, standard cable
- Agency Approval: Not required
- Linear Range: 1.5 mm (60 mils)
- Scale Factor: 7.87 V/mm (200 mV/mil)
- Frequency Response: 0 to 10 kHz
- Probe Tip Diameter: 5 mm
- Probe Case Material: AISI 304 stainless steel
- Probe Tip Material: Polyphenylene sulfide
- Operating Temperature: -52°C to +177°C
- Storage Temperature: -52°C to +177°C
- DC Resistance: 4.2 ± 0.5 Ω
- Minimum Bend Radius: 25.4 mm
Functional Features
- Reverse mount configuration for internal-to-external installation
- 3/8-24 UNF thread for robust mounting in thick-walled housings
- 2 mm unthreaded length for precise positioning
- Compatible with 3300 XL NSv Proximitor and extension cables
- ClickLoc connector prevents loosening under vibration
- TipLoc molded tip for mechanical durability
- Full system interchangeability
Application Scenarios
- Gearbox internal bearing monitoring
- Pump volute internal shaft measurement
- Compressor casing internal mounting
- Steam turbine internal gap measurement
- Applications requiring installation from inside machine cavity
Performance Parameters
- Linearity Deviation: Less than ±0.06 mm
- Resolution: High precision for small displacement
- Temperature Stability: Maintained over full operating range
- Interchangeability: Within system specifications
- Thread Engagement: Appropriate for 3/8-24 UNF hole depth
- Side-view Performance: Enhanced for tight clearances
Material Composition
- Probe Case: AISI 304 stainless steel
- Probe Tip: Polyphenylene sulfide
- Cable Insulation: Fluorinated ethylene propylene
- Connector Contacts: Gold-plated brass
Structural Characteristics
- Reverse mount design with probe tip at case rear
- 120 mm overall length with 3/8-24 UNF thread
- 2 mm smooth unthreaded section near tip
- 1.0 meter integral coaxial cable
- Standard ClickLoc miniature connector
- PPS probe tip with molded bond
Working Principle The probe operates on the same eddy-current principle as standard mount probes. The internal coil generates a high-frequency magnetic field at the probe tip. Eddy currents induced in the target modify the coil impedance, which the Proximitor converts into a proportional voltage. The reverse mount configuration simply relocates the sensing tip to the opposite end of the case, allowing the threaded body to be inserted from the target side.
Installation Requirements
- Install from inside machine housing through 3/8-24 UNF hole
- Ensure 2 mm unthreaded section positions correctly relative to target
- Set gap to 1.0 mm from target surface
- Verify -10 Vdc gap voltage
- Secure with locknut from outside housing
- Maintain cable bend radius minimums
Usage Precautions
- Verify reverse mount orientation before installation
- Ensure adequate internal clearance for probe body insertion
- Do not force through undersized holes
- Check O-ring seal integrity if present
- Verify external locknut torque does not damage case
- Route cable to avoid contact with rotating components
