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Bently Nevada 330878-51-05 3300 XL 50 mm Proximitor Sensor

Configured for eddy-current proximity signal conditioning in the Bently Nevada 3300 XL monitoring system, the Bently Nevada 330878-51-05 (330878 Proximitor Sensor) provides direct electrical signal conversion between the proximity probe assembly and the connected monitoring channel. The module is configured for a 5.0 m system length with DIN rail mounting and multiple agency approvals.

Suffix Breakdown & Model Matrix

The supplied documentation identifies 330878-51-05 as a fixed ordering model. No official suffix decoding beyond the documented configuration is provided. Therefore, no additional suffix interpretation is included.

Hardware Specifications

Parameter	Specification
Model	330878-51-05
Brand	Bently Nevada
Product Type	3300 XL 50 mm Proximitor Sensor
Origin	USA
Shipment Location	Xiamen, China
Weight	0.2 kg
Dimensions	8.8 x 3.5 x 7 cm (estimated shipping size)
Mounting	DIN mount
System Length	5 m including extension cable
Total System Length Option	5.0 m (16.4 ft)
Output Resistance	50 Ohm
Housing Material	A380 aluminum
Agency Approval	Multiple Approvals
Tariff Code	8537101190
Operating Temp	Not specified
Power Consumption	Not specified

Gap Voltage Validation and Probe Scaling

The 3300 XL Proximitor Sensor is designed for operation with the corresponding eddy-current probe system using the specified system cable length. During commissioning, gap voltage should be verified against the installation target specified by the applicable Bently Nevada calibration procedure. For shaft vibration measurements, probe scaling accuracy depends on matching the Proximitor Sensor, extension cable, and proximity probe as a calibrated system. Mixing components with different calibrated system lengths can introduce measurement error.

Frequently Asked Questions

Q: Can this Proximitor Sensor be exchanged without recalibrating the monitoring channel?
A: Replacement should use the identical model and configured system length. After installation, gap voltage and probe response should be verified according to the equipment commissioning procedure.

Q: Can extension cables with different system lengths be connected to this unit?
A: No. The Proximitor Sensor is calibrated for a defined total system length. Using an unmatched extension cable changes the probe system characteristics and measurement scaling.

Q: Is hot swapping recommended during machine operation?
A: The available documentation does not specify hot-swap capability. Replacement should follow the shutdown and maintenance procedure established for the connected monitoring system.

Field Installation Guidelines

• Mount the sensor securely on a DIN rail with adequate mechanical support.
• Install only with the specified compatible proximity probe and extension cable to maintain calibrated system performance.
• Route probe cables separately from high-power conductors to minimize electromagnetic coupling.
• Ground cable shields according to the system grounding practice to reduce electrical noise and prevent ground loops.
• Verify probe gap voltage after installation before returning the monitored machine to service.
• Inspect cable connectors and locking hardware to ensure proper mechanical engagement before energizing the monitoring channel.

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