Description

Bently Nevada 330103-20-25-05-02-CN 3300 XL 8 mm Proximity Probe

Configured for non-contact shaft displacement and vibration measurement in the Bently Nevada 3300 XL Proximity Transducer System, the Bently Nevada 330103-20-25-05-02-CN (330103 3300 XL 8 mm Proximity Probe) provides direct eddy-current signal conversion for rotor position and dynamic motion monitoring.

Hardware Specifications

Parameter	Specification
Model	330103-20-25-05-02-CN
Brand	Bently Nevada
Product Type	3300 XL 8 mm Proximity Probe
Origin	USA
Weight	Approx. 0.12 kg
Operating Temp	-51 deg C to +177 deg C
Power Consumption	Passive probe device; power supplied by compatible 3300 XL Proximitor Sensor
Probe Diameter	8 mm
Thread Type	M10 x 1 metric thread
Probe Construction	Unarmored stainless steel case with PPS probe tip
Cable Type	FEP insulated coaxial cable
Connector Type	Gold-plated miniature coaxial ClickLoc connector
Measurement Principle	Eddy-current displacement measurement
System Linear Range	2.0 mm (80 mils)
Scale Factor	7.87 V/mm (200 mV/mil) nominal with standard 3300 XL Proximitor Sensor and AISI 4140 target
Linearity	Within +/- 1% over full linear range
Standard Compliance	API 670 compliant mechanical and electrical configuration

Eddy-Current Scaling and Rotor Dynamics Monitoring

The 330103-20-25-05-02-CN uses an eddy-current sensing element to generate proportional voltage output according to the probe gap distance. The paired 3300 XL Proximitor Sensor processes the RF impedance change and converts the shaft displacement into a calibrated voltage signal.

The probe provides a nominal scale factor of 200 mV/mil, which allows the monitoring system to evaluate shaft vibration amplitude, axial position changes, and Keyphasor reference conditions. Furthermore, proper gap voltage validation supports accurate probe operation, with typical Bently Nevada systems using approximately -10 VDC target gap conditions during calibration.

The probe geometry supports rotor dynamics analysis by maintaining stable measurement response across rotating equipment operating conditions. The coaxial cable construction also reduces signal disturbance during vibration and displacement measurement.

Frequently Asked Questions

Q: What Proximitor Sensor is required for the 330103-20-25-05-02-CN probe?
A: The probe operates with a compatible Bently Nevada 3300 XL Proximitor Sensor. The sensor provides excitation power and converts eddy-current changes into displacement voltage output.

Q: Can the probe directly output a vibration signal without a Proximitor Sensor?
A: No. The probe is a passive eddy-current sensing element. It requires a matching Proximitor Sensor to provide signal conditioning and output scaling.

Q: What installation condition affects measurement accuracy?
A: Probe mounting alignment, target material condition, cable routing, and correct gap voltage adjustment directly affect displacement measurement accuracy.

Field Installation Guidelines

Install the 330103-20-25-05-02-CN probe with the sensing tip aligned perpendicular to the rotating target surface. Maintain the specified M10 x 1 thread engagement and prevent mechanical contact between the probe tip and shaft surface.

Route the coaxial cable away from high-current power conductors, switching devices, and electromagnetic interference sources. Connect the cable shield according to the Bently Nevada system grounding practice to reduce electrical noise.

Before operation, verify the probe gap voltage through the connected 3300 XL Proximitor Sensor. Confirm that the output response matches the expected displacement scaling before placing the monitored machine into service.

Avoid excessive bending or mechanical stress on the FEP insulated cable section. Protect all cable connections from moisture ingress and mechanical impact during installation.

Specifications

• Brand: Bently Nevada

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems