Bently Nevada 330908-00-20-70-02-00 3300 NSv Probe

Product Overview

The Bently Nevada 330908-00-20-70-02-00 3300 NSv proximity probe provides non-contact displacement sensing for confined turbomachinery spaces. This probe employs a narrow side-view configuration that enables installation where standard straight probes cannot reach. It converts the physical gap between the probe tip and shaft surface into a stable impedance signal. Plant engineers select this NSv series probe for its compact profile and reliable performance. Its rugged construction ensures measurement accuracy across extreme temperature fluctuations and high-vibration environments.

Technical Specifications

The table below presents the complete technical parameters for the Bently Nevada 330908-00-20-70-02-00 3300 NSv proximity probe.

Parameter	Specification
Product Type	3300 NSv Proximity Probe
Compatibility	Bently Nevada 3300 and 3500 monitoring systems
Mounting Configuration	NSv (Narrow Side-view)
Thread Size	3/4-20 UNF
Overall Probe Length	700 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 1.15 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

NSv Configuration and Access Benefits

The Bently Nevada 330908-00-20-70-02-00 features a narrow side-view design that allows installation in tight machinery spaces. This configuration enables probe access where standard straight probes cannot fit due to spatial constraints. The NSv profile proves particularly valuable in bearing housings with limited clearance around the shaft. Consequently, you can install this probe without modifying existing machine casings or brackets.

Probe Tip and Coil Technology

A PPS probe tip encapsulates the precision-wound induction coil at the sensing face. This advanced polymer provides exceptional resistance to chemical attack and thermal degradation in oil-mist environments. The coil maintains a stable inductance value of 3.2 microhenries across its entire operating temperature range. This stability guarantees consistent oscillator drive characteristics for accurate gap measurements.

Mechanical Dimensions and Extended Length

This NSv probe measures 700 millimeters from the sensing face to the connector termination. The extended length allows installation in deep bore applications where side-view access positions the probe far from the connector. It includes a 20-millimeter threaded section with standard 3/4-20 UNF threads. The 316L stainless steel case provides excellent corrosion protection and mechanical durability for long-term service.

Cable Assembly and Environmental Protection

A 2-meter integral fluoropolymer-jacketed cable extends from the probe body for system interconnection. This cable length provides sufficient routing from the side-view mounting position to junction boxes. Gold-plated 6-pin connectors at the cable end ensure secure, low-resistance electrical contacts. The probe operates reliably from -51°C to +177°C, making it suitable for both gas and steam turbine monitoring.

Installation and System Integration

Installing the Bently Nevada 330908-00-20-70-02-00 requires mounting the probe in the designated side-view bracket within the machine housing. You must set the probe gap correctly to achieve the proper DC bias voltage for the connected proximitor. The NSv configuration allows installation where the shaft surface proves inaccessible to conventional straight probes. This probe integrates with 3300 XL proximitors and 3500 rack systems for comprehensive machinery protection.