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Bently Nevada 330850-91-05 Proximitor Sensor

Configured for conversion of eddy-current probe gap variations into conditioned analog voltage in 3300 XL monitoring architectures, the Bently Nevada 330850-91-05 (3300 XL 25 mm Proximitor Sensor) provides direct electrical signal conditioning for radial vibration and displacement measurement chains.

Suffix Breakdown & Model Matrix

No explicit manufacturer-published suffix decomposition for 330850-91-05 is provided in the supplied dataset. The order code is referenced as a system-level configuration identifier within the 3300 XL 25 mm Proximitor Sensor platform, primarily defining system length and approval options.

Hardware Specifications

Parameter	Specification
ModelBrand	Bently Nevada 330850-91-05
Origin	USA
Weight	0.2 kg
Dimensions	8.8 x 3.5 x 7 cm (shipping size)
OperatingTemp	-51 degC to +100 degC
StorageTemp	-51 degC to +105 degC
System Length	9.0 m (29.5 ft)
Average Scale Factor	0.787 V/mm (20 mV/mil) nominal
PowerConsumption	Not specified
Product Type	Proximitor Sensor (Eddy Current Signal Conditioner)

Eddy Current Scaling and Gap Voltage Validation Characteristics

The 3300 XL 25 mm Proximitor Sensor implements eddy-current transduction scaling aligned with probe-to-target gap linearization. The output transfer function is referenced to nominal sensitivity scaling of 0.787 V/mm, enabling displacement conversion from high-frequency carrier demodulation.

Gap voltage validation is aligned with standardized -10 VDC bias reference behavior typical in Bently Nevada proximity systems. This supports linear operating region verification for probe-to-target clearance conditions under static and dynamic shaft movement.

Cross-talk suppression is achieved through shielded cabling architecture and impedance-controlled signal routing, minimizing interference between adjacent vibration channels in multi-probe installations. Rotor dynamics signal integrity is maintained via low-noise demodulation stages optimized for high-speed shaft vibration tracking.

Frequently Asked Questions

Q: Is the 330850-91-05 hot-swappable within a running 3300 XL rack system?
A: The module is not designed for live insertion. Power isolation is required prior to sensor chain disconnection to prevent transient excitation of the probe driver circuit.

Q: What is the electrical behavior of the output scaling interface?
A: The output is a conditioned analog voltage proportional to gap displacement, using a nominal scaling factor of 0.787 V/mm under standard calibration conditions.

Q: Does the system length of 9.0 m affect signal integrity?
A: System length defines probe cable routing limits. Excessive deviation from rated length can introduce attenuation and phase distortion in the eddy-current loop.

Field Installation Guidelines

Ensure proper separation between probe cabling and high-voltage conductors to minimize electromagnetic coupling. Maintain continuous shield grounding at a single reference point to avoid ground loop currents in the proximitor signal path.

Cable routing must respect minimum bend radius specifications to prevent coaxial impedance variation. All connectors should be torqued to manufacturer mechanical retention standards to ensure stable high-frequency carrier transmission.

Verify probe gap calibration using static shaft reference before commissioning. Avoid mechanical stress on probe tip assembly during installation to preserve linear response characteristics.

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