Configured for shaft displacement measurement in the 3300 XL Transducer System, the Bently Nevada 330101-00-28-20-02-05 (base model 330101) provides direct eddy-current-based transduction for radial vibration and axial position monitoring in rotating machinery trains.
Suffix Breakdown & Model Matrix
Option
Description
Value
330101
Probe Type
Unthreaded 8 mm Eddy Current Probe
-00
Unthreaded Length
0.0 in
-28
Case Length
2.8 in
-20
Total Length
2.0 m Integrated Cable
-02
Connector
Miniature Coaxial ClickLoc with Protector
-05
Agency Approval
Multiple Hazardous Area Certifications
Hardware Specifications
Parameter
Specification
Model Brand
Bently Nevada
Origin
USA
Weight
Approx. 0.2 kg (Including Cable)
Dimensions
2.8 in Case Length; 2.0 m Total Length
Operating Temp
-51 degC to +177 degC
Power Consumption
Passive Sensor (Powered by Proximitor)
Target Material
AISI 4140 Steel (Calibrated)
Linear Range
2.0 mm (80 mils)
Scale Factor
7.87 V/mm (200 mV/mil)
Frequency Response
0 Hz to 10 kHz
Connector Type
ClickLoc Miniature Coaxial
Case Material
303 Stainless Steel
Eddy-Current Probe Scaling and Gap Voltage Validation
The transducer system requires precise gap voltage validation to ensure the probe tip remains within the linear range relative to the conductive target surface. For an 8 mm probe, the typical standoff voltage at zero gap is approximately -10 VDC when powered by a compatible Proximitor sensor. Scale factor linearity is maintained strictly within the 2.0 mm window; deviations outside this range result in non-linear output response. Cross-talk suppression between adjacent probes is achieved through physical separation distances exceeding 1.5 times the probe diameter and shielded coaxial routing.
Frequently Asked Questions
Q: What is the maximum permissible cable pull strength for the 330101 series?
A: The probe-to-cable assembly withstands a maximum tensile load of 334 N (75 lbf) without mechanical failure.
Q: Is this probe compatible with a 5.0-meter Proximitor sensor?
A: Yes. When paired with a 3.0-meter extension cable, the total system electrical length becomes 5.0 meters, matching the Proximitor sensor calibration.
Q: Can the probe operate submerged in liquid?
A: No. While it supports 100% condensing humidity, the probe is not rated for continuous submersion.
Field Installation Guidelines
Install the probe ensuring the tip is perpendicular to the target surface to avoid cosine error. Maintain a minimum of 5 threads engagement when securing the probe into the machine housing. Ground the shield drain wire at the termination point only to prevent ground loops. Verify the gap voltage using a multimeter before energizing the monitoring system; the voltage should reside within the linear operating window of the Proximitor sensor.
