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Bently Nevada 330878-90-05 3300 XL 50 mm Proximitor Sensor

Configured for eddy-current proximity signal conditioning in the Bently Nevada 3300 XL machinery protection system, the Bently Nevada 330878-90-05 (330878 Proximitor Sensor) provides direct electrical execution. The assembly converts the probe signal for transmission to the associated monitoring system while maintaining the specified 9.0 m system length and panel-mount configuration.

Suffix Breakdown & Model Matrix

The available documentation identifies 330878-90-05 as a complete ordering code. No official suffix-by-suffix decoding is provided in the supplied data; therefore, no additional breakdown is inferred.

Hardware Specifications

Parameter	Specification
Model	330878-90-05
Brand	Bently Nevada
Origin	USA
Weight	0.2 kg
Dimensions	8.8 x 3.5 x 7 cm (estimated shipping size)
Product Series	3300 XL
Product Type	50 mm Proximitor Sensor
System Length	9.0 m (29.5 ft)
Mounting	Panel mount
Agency Approval	Multiple Approvals
Probe Tip Material	Polyphenylene Sulfide
Proximitor Housing Material	A380 aluminum
Place of Shipment	Xiamen, China
Tariff Code	8537101190

Gap Voltage Validation

The 3300 XL measurement chain is intended to operate with a matched eddy-current probe, extension cable, and Proximitor Sensor using the specified system length. During commissioning, gap voltage should be verified after mechanical installation. For Bently Nevada eddy-current systems, technicians commonly validate the static probe position against the expected gap voltage target, typically near -10 VDC when the mechanical installation permits. Final acceptance should always follow the applicable system documentation for the installed probe configuration.

Frequently Asked Questions

Q: Can this Proximitor Sensor be installed with a different system cable length?
A: The sensor should be used with the specified matched probe and extension cable assembly corresponding to the defined 9.0 m system length. Mixing unmatched cable lengths can affect calibration and measurement accuracy.

Q: Does the supplied information indicate hot-swap capability?
A: No. The provided documentation does not specify hot-swap support. Installation or replacement should follow the maintenance procedure defined for the associated monitoring system.

Q: Why is shield grounding important for this sensor?
A: Proper cable shielding and grounding reduce electrical noise and help minimize signal interference between adjacent proximity measurement channels.

Field Installation Guidelines

• Verify that the installed probe, extension cable, and Proximitor Sensor belong to the same calibrated system length.
• Mount the Proximitor Sensor securely on the designated panel to prevent vibration-induced cable movement.
• Route proximity cables separately from high-voltage and motor power conductors whenever practical.
• Maintain cable shielding in accordance with the installation manual and avoid multiple unintended shield grounding points.
• Confirm probe gap voltage after mechanical alignment before placing the monitoring channel into service.

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