Bently Nevada 330703-000-050-90-02-00 Proximity Probe

Overview

The Bently Nevada 330703-000-050-90-02-00 is a core component of the 3300 XL 11 mm Proximity Transducer System. This eddy-current probe delivers non-contact displacement and vibration measurements for critical rotating machinery. Consequently, engineers deploy it across steam turbines, compressors, and large industrial pumps.

Technical Specifications

The probe features a 50 mm case length and an unthreaded length of 0 mm. Its M14 × 1.5 metric thread ensures secure mounting with a 21 mm maximum engagement. Additionally, the 9.0-meter cable provides extended reach to monitoring cabinets.

Parameter	Value
Probe Tip Diameter	11 mm
Overall Case Length	50 mm
Unthreaded Length	0 mm
Total Cable Length	9.0 meters (29.5 feet)
Thread Type	M14 × 1.5 metric
Maximum Thread Engagement	21 mm
Weight	0.1 kg (probe only)
Linear Range	4.0 mm (160 mils)
Scale Factor	3.94 V/mm (100 mV/mil)
DC Resistance	8.5 ± 1.1 ohms (9m system)
Tip Material	Polyphenylene Sulfide (PPS)
Case Material	AISI 304 Stainless Steel
Cable Type	75 Ω triaxial, FEP insulated
Operating Temperature	-52°C to +177°C
Connector Type	Miniature coaxial ClickLoc
Agency Approval	Not required

Performance and System Integration

This probe pairs with 3300 XL 11 mm Proximitor sensors and matching extension cables. Therefore, it integrates seamlessly into existing 3300 and 3500 monitoring systems. The gold-plated ClickLoc connector locks firmly to prevent signal loss from machine vibration.

Moreover, the 99.9% braided copper shielding reduces interference from motors and variable frequency drives. The IP67 sealing protects the probe from dust and water ingress in harsh industrial environments.

Applications and Reliability

Steam turbines, gas compressors, and large industrial pumps commonly rely on this probe. Maintenance teams deploy it for axial thrust position, rod drop detection, and Keyphasor phase reference measurements. Each unit ships factory-sealed with a twelve-month warranty.