The Bently Nevada 330880-16-00-075-00-02, also cataloged as the 330880 PROXPAC XL Proximity Transducer Assembly, operates as a dedicated hardware component for non-contact shaft displacement measurement within Bently Nevada vibration monitoring systems.
Hardware Specifications
Parameter
Specification
Model
330880-16-00-075-00-02
Brand
Bently Nevada
Product Type
PROXPAC XL Proximity Transducer Assembly
Origin
USA
Weight
Approximately 5.3 kg
Operating Temp
-52 deg C to +100 deg C
Power Consumption
Powered by -17.5 VDC to -26 VDC supply without safety barriers
Probe Diameter
8 mm
Probe Type
3300 XL 8 mm Proximity Probe
Probe Penetration Length
75 mm
Mounting Thread
3/4-14 NPT
Housing Material
Glass and conductive fiber-reinforced Polyphenylene Sulfide (PPS)
Linear Range
0.25 mm to 2.3 mm
Recommended Gap Setting
1.27 mm
Scale Factor
7.87 V/mm (200 mV/mil) +/-5% nominal
Frequency Response
0 Hz to 10 kHz (+/-3 dB)
Output Resistance
50 ohm nominal
Probe DC Resistance
50 ohm nominal
Ingress Protection
IP66 / Type 4X
Eddy-Current Probe Scaling and Rotor Dynamics Monitoring
The 330880-16-00-075-00-02 assembly uses eddy-current probe scaling principles to convert shaft displacement into proportional electrical signals. The integrated 3300 XL 8 mm probe maintains a nominal scale factor of 7.87 V/mm, allowing vibration and axial position systems to process dynamic shaft movement data.
Additionally, the assembly supports rotor dynamics monitoring by providing non-contact measurement of rotating shaft position changes. The system evaluates vibration displacement, shaft motion, and mechanical clearance behavior through continuous proximity signal output.
The probe gap voltage requires proper validation during installation. Bently Nevada monitoring systems typically verify the operating gap condition around the -10 VDC target range to confirm correct probe positioning and signal linearity.
Frequently Asked Questions
Q: Does the 330880-16-00-075-00-02 require a separate Proximitor sensor housing? A: No. The PROXPAC XL assembly integrates the probe, cable, and Proximitor electronics into a single enclosure.
Q: What signal measurement principle does this assembly use? A: The assembly uses an eddy-current proximity measurement principle to detect shaft displacement without physical contact.
Q: Can the unit connect directly to Bently Nevada 3500 monitoring systems? A: Yes. The assembly provides proximity measurement signals compatible with Bently Nevada machinery protection monitoring architectures when the system configuration matches the required input characteristics.
Field Installation Guidelines
Install the 330880-16-00-075-00-02 using the specified 3/4-14 NPT mounting interface and ensure proper mechanical alignment between the probe tip and rotating shaft surface.
Verify the probe gap before operation and confirm the electrical output remains within the expected operating range. Maintain correct cable routing to reduce electromagnetic interference from high-current power conductors.
Connect the housing grounding path according to site grounding practices. Use proper shielding termination methods to minimize signal noise during vibration and displacement measurement.
Inspect the probe tip, mounting thread, and cable condition before commissioning. Avoid mechanical impact on the PPS housing and maintain environmental sealing when installing the assembly in outdoor or contaminated areas.
