Product Overview

The Bently Nevada 18745-04-05 is a specialized signal conditioning unit belonging to the legacy 7200 Series transducer family. This 5mm Proximitor sensor is engineered to convert the eddy current signals from a proximity probe into a linear DC voltage. By measuring the "gap-to-voltage" relationship, it provides high-accuracy data regarding the distance between the probe tip and the target material. Designed for long-term stability in industrial environments, the 18745-04-05 facilitates the monitoring of both static (position) and dynamic (vibration) mechanical movements without physical contact, significantly reducing maintenance overhead compared to contact-based sensors.

Technical Hardware Parameters

The 18745-04-05 is built to meet the rigorous demands of Turbine Supervisory Instrumentation (TSI) systems, ensuring signal fidelity over long distances and varied frequencies.

• Model Number: 18745-04-05

• Transducer Series: 7200 Series (5mm Probe Compatible)

• System Length: 9.0 Meters (29.6 feet)

• Frequency Response: 0 Hz (DC) to 10 kHz

• Signal Output: Linear DC voltage proportional to gap

• Input Requirements: -17.5 Vdc to -26 Vdc

• Mounting: Compatible with standard 7200 Series mounting plates or protective enclosures

• Certifications: Option -05 indicates multiple international approvals (including CSA, ATEX, and IECEx) for hazardous area use

• Interchangeability: Specifically calibrated for use with 5mm 7200 series proximity probes and extension cables

Operational Use Cases

This Proximitor sensor is a fundamental component for monitoring critical rotating machinery equipped with fluid-film bearings. It is primarily utilized in power plants and refineries to track radial shaft vibration and axial thrust position in medium-sized turbines, centrifugal pumps, and electric motors. Because of its 0 Hz capability, it is particularly effective for detecting shaft eccentricity and thermal expansion during machine startup phases. When installed within the appropriate fiberglass or stainless steel IP66-rated housings, the 18745-04-05 maintains reliable performance in offshore platforms and chemical processing zones where corrosive elements are present.