Bently Nevada 330102-20-47-10-02-00 3300 XL 8mm Probe

Product Overview

The Bently Nevada 330102-20-47-10-02-00 3300 XL 8 mm proximity probe delivers precision non-contact displacement sensing for critical turbomachinery monitoring. This probe functions as the primary sensing element in eddy-current measurement systems for vibration and position detection. It translates the gap between the probe tip and shaft into a stable impedance signal. Plant engineers depend on this 3300 XL series probe for reliable performance in demanding industrial applications. Its rugged construction ensures measurement accuracy across extreme temperature fluctuations and harsh environmental conditions.

Technical Specifications

The table below presents the complete technical parameters for the Bently Nevada 330102-20-47-10-02-00 3300 XL 8 mm proximity probe.

Parameter	Specification
Product Type	3300 XL 8 mm Proximity Probe
Compatibility	Bently Nevada 3300 XL and 3500 monitoring systems
Thread Size	3/4-20 UNF
Overall Probe Length	470 mm (tip to connector)
Thread Length	20 mm
Tip Material	Polyphenylene sulfide (PPS) with encapsulated coil
Case Material	316L stainless steel
Integral Cable Length	2 meters (6.6 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 0.98 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 Technology

The Bently Nevada 330102-20-47-10-02-00 features a PPS probe tip that encapsulates a precision-wound induction coil. This advanced polymer resists chemical attack and thermal degradation exceptionally well. The coil maintains a stable inductance of 3.2 microhenries throughout the entire specified temperature range. This stability ensures consistent oscillator drive characteristics for accurate gap measurements in rotating equipment.

Mechanical Dimensions and Extended Length

This 3300 XL probe measures 470 millimeters from the sensing face to the connector termination. The extended length allows installation in deep bore applications where standard probes cannot reach the target surface. It includes a 20-millimeter threaded section with standard 3/4-20 UNF threads. The 316L stainless steel case provides robust corrosion protection and mechanical durability for long-term service in harsh environments.

Integral Cable and Connector Assembly

A 2-meter integral fluoropolymer-jacketed cable extends directly from the probe body to facilitate system interconnection. This cable offers sufficient length for convenient routing from deep measurement points to junction boxes. Gold-plated 6-pin connectors at the termination end ensure secure, low-resistance electrical contacts. The cable’s 25-millimeter minimum bend radius prevents stress-induced damage during installation.

Environmental Performance and Reliability

This 3300 XL probe operates reliably from -51°C to +177°C across a remarkably wide temperature range. It also withstands short-term storage temperatures up to +185°C without suffering performance degradation. The sealed PPS tip design prevents moisture ingress that could compromise coil integrity. These environmental tolerances make the Bently Nevada 330102-20-47-10-02-00 ideal for both gas turbine and steam turbine monitoring.

Installation and System Integration

Installing this 3300 XL 8 mm probe requires threading it into a suitable mounting bracket or bearing housing. You must set the probe gap correctly to achieve the appropriate DC bias voltage for the proximitor. The 470-millimeter length suits installations where the mounting point sits far from the shaft surface. This probe integrates seamlessly with 3300 XL proximitors and 3500 rack monitoring systems for complete protection.