Bently Nevada 330910-00-18-10-01-BR Proximity Probe

Product Overview

The Bently Nevada 330910-00-18-10-01-BR proximity probe provides precision non-contact displacement sensing for rotating machinery protection systems. This probe operates as the primary sensing element within the eddy-current measurement chain. It converts the gap between the probe tip and the shaft surface into an impedance signal. Plant engineers select this probe for its proven performance in critical turbomachinery applications. Its rugged construction ensures long-term stability in harsh industrial operating conditions.

Technical Specifications

The following table presents the complete technical parameters for the Bently Nevada 330910-00-18-10-01-BR proximity probe.

Parameter	Specification
Product Type	Proximity Probe (Sensing Element)
Compatibility	Bently Nevada 3500 and 3300 monitoring systems
Thread Size	3/4-20 UNF
Overall Probe Length	180 mm (tip to connector)
Thread Length	10 mm
Tip Material	Polyphenylene sulfide (PPS) with encapsulated coil
Case Material	316L stainless steel
Integral Cable Length	10 meters (32.8 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 0.80 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 330910-00-18-10-01-BR features a PPS probe tip that encapsulates a precision-wound induction coil. This material provides excellent resistance to chemical attack and thermal degradation. The coil maintains a stable inductance value of 3.2 microhenries across its specified temperature range. This stability ensures consistent oscillator drive characteristics for accurate gap measurements.

Mechanical Dimensions and Mounting

This probe measures 180 millimeters from the sensing face to the connector termination. It includes a 10-millimeter threaded section with 3/4-20 UNF threads for standard installation. The 316L stainless steel case protects the internal components from corrosion and mechanical damage. Consequently, the Bently Nevada 330910-00-18-10-01-BR fits most standard mounting brackets without requiring special adapters.

Integral Cable and Connector Assembly

A 10-meter integral fluoropolymer-jacketed cable extends directly from the probe body. This cable allows flexible routing between the measurement point and the monitoring rack. Gold-plated 6-pin connectors at the termination end provide secure, low-resistance electrical connections. The cable’s 25-millimeter minimum bend radius prevents stress-induced signal degradation during installation.

Environmental Operating Range

This probe operates reliably across an extremely wide temperature range from -51°C to +177°C. It also withstands short-term storage temperatures up to +185°C without permanent damage. The sealed tip design prevents moisture ingress that could compromise measurement accuracy. These environmental tolerances make the Bently Nevada 330910-00-18-10-01-BR suitable for both cryogenic and high-temperature turbomachinery applications.

Installation and System Integration

Installing this probe requires threading it into a suitable mounting fixture or housing assembly. You must set the probe gap to achieve the proper DC bias voltage for the connected proximitor. The threaded section allows fine gap adjustments using standard tools. This probe integrates seamlessly with 3300 XL proximitors and 3500 rack monitoring systems for complete protection solutions.