Bently Nevada 330103-00-07-50-02-05 3300 XL 8mm Probe

Product Overview

The Bently Nevada 330103-00-07-50-02-05 3300 XL 8mm proximity probe delivers non-contact shaft displacement measurement for critical rotating machinery. This probe operates as the primary sensing element within the eddy-current monitoring system for vibration detection. It converts the physical gap between probe tip and shaft surface into a stable impedance signal. Turbine operators select this probe for its proven reliability in power generation and petrochemical facilities. Its rugged construction ensures accurate measurement performance across extreme temperature ranges and harsh environments.

Technical Specifications

The table below outlines the complete technical parameters for the Bently Nevada 330103-00-07-50-02-05 3300 XL 8mm proximity probe.

Parameter	Specification
Product Type	3300 XL 8mm Proximity Probe
Compatibility	Bently Nevada 3300 XL and 3500 monitoring systems
Thread Size	3/4-20 UNF
Overall Probe Length	50 mm (tip to connector)
Thread Length	7 mm
Tip Material	Polyphenylene sulfide (PPS) with encapsulated coil
Case Material	316L stainless steel
Integral Cable Length	5 meters (16.4 feet)
Cable Jacket	High-strength fluoropolymer
Connector Type	6-pin female, gold-plated contacts
Coil Inductance	3.2 µH ±5% at 25°C
Weight	Approximately 0.65 kg
Operating Temperature	-51°C to +177°C
Storage Temperature	-55°C to +185°C
Minimum Bend Radius	25 mm (static)

Design Features and Construction

Probe Tip and Coil Assembly

The Bently Nevada 330103-00-07-50-02-05 features a PPS probe tip that encapsulates a precision-wound induction coil. This advanced polymer provides excellent resistance to chemical attack and thermal degradation. The coil maintains a stable inductance of 3.2 microhenries across the entire specified temperature range. This stability ensures consistent oscillator drive characteristics for reliable gap measurements in rotating equipment.

Mechanical Dimensions and Mounting

This 3300 XL probe measures 50 millimeters from the sensing face to the connector termination. The compact length makes it ideal for installations with limited clearance or shallow mounting depths. It includes a 7-millimeter threaded section with standard 3/4-20 UNF threads. The 316L stainless steel case delivers robust corrosion protection and mechanical durability for long-term service in demanding environments.

Cable Assembly and Signal Integrity

A 5-meter integral fluoropolymer-jacketed cable extends directly from the probe body for system interconnection. This cable length provides convenient routing from measurement points to junction boxes or proximitors. Gold-plated 6-pin connectors at the termination end create secure, low-resistance electrical contacts. The cable’s 25-millimeter minimum bend radius prevents internal conductor damage during installation.

Environmental Performance

This 3300 XL probe operates reliably from -51°C to +177°C across a remarkably wide temperature span. It also withstands short-term storage temperatures up to +185°C without degrading its electrical characteristics. The sealed PPS tip prevents moisture ingress that could compromise coil performance over time. These environmental tolerances make the Bently Nevada 330103-00-07-50-02-05 suitable for both gas turbines and steam turbines.

Installation and System Integration

Installing this 3300 XL 8mm probe requires threading it into a suitable mounting fixture or bearing housing assembly. You must set the probe gap correctly to achieve the proper DC bias voltage for the connected proximitor. The 50-millimeter length suits installations where space constraints limit probe insertion depth. This probe integrates seamlessly with 3300 XL proximitors and 3500 rack monitoring systems for complete protection.