Product Overview

The Bently Nevada 18745-02 is a high-precision 7200 Series Proximitor Sensor designed specifically for 5mm proximity probe systems. This advanced signal conditioner converts the complex impedance change from an eddy current probe into a stable, linear DC voltage. The resulting output directly corresponds to the physical distance between the probe tip and the observed rotating shaft. As a cornerstone of machinery protection, the 18745-02 enables real-time monitoring of shaft vibration, axial position, and radial displacement in critical industrial assets.

Technical Specifications

The 18745-02 operates within the legacy 7200 Series ecosystem, providing robust performance for specific 5mm monitoring loops.

Engineering Advantages

• Optimized Signal Conditioning: The 18745-02 utilizes active electronics to linearize the non-linear output of eddy current probes. This ensures that the monitoring system receives a consistent scale factor, allowing for accurate vibration amplitude readings across the entire 80-mil linear range.

• Superior Noise Rejection: Encased in a rugged housing, the Proximitor provides excellent immunity to electromagnetic interference (EMI). This protects the integrity of the displacement signal in high-voltage environments typical of power generation and industrial motor rooms.

• Seamless Field Calibration: The module features accessible terminal connections for rapid loop checks. Maintenance teams can verify the gap voltage during installation without disconnecting the primary signal path, significantly reducing commissioning time.

• Industrial Resilience: Designed for continuous operation, the 18745-02 withstands temperature fluctuations and vibrations. Its solid-state design eliminates moving parts, ensuring long-term stability and reducing the need for frequent recalibration.

Part Number Breakdown: 18745 Series

Bently Nevada identifies the 7200 Series Proximitor configurations through specific dash numbers:

• 18745-02: Standard 5mm Proximitor Sensor (Legacy 7200 System).

• 18745-04: Variant typically associated with specialized system configurations or 9-meter system lengths.

• System Match: For accurate measurement, you must match the Proximitor to the specific probe diameter and total system cable length (e.g., 5-meter or 9-meter).

FAQs

Q: Is the 18745-02 Proximitor 100% Brand New?

A: Yes. We supply only 100% Brand New and Original Bently Nevada components in factory packaging. Each unit comes with a 12-month factory warranty. We also provide a Certificate of Origin (COO) upon request.

Q: Can I use the 18745-02 with a 3300 XL 8mm probe?

A: No. The 18745-02 is specifically calibrated for the 7200 Series 5mm probe. Using this Proximitor with probes of different diameters or from different series (like 3300 XL) will result in incorrect scale factors and may lead to false alarms or missed trip conditions.

Q: What is the typical power requirement for this sensor?

A: The module requires a stable supply between –18 VDC and –24 VDC, usually provided by the power supply module within the 3500 or legacy monitoring rack.

Q: Does this module require a specific mounting orientation?

A: No, but you should mount it in a secure enclosure or on a DIN rail (with appropriate clips) to protect the terminal connections from mechanical stress and moisture. Ensure sufficient clearance for the coaxial probe connector.