Product Overview

The Bently Nevada 18745-03 operates as a high-precision signal conditioner within the legacy 7200 Series Proximity Transducer System. This 5mm Proximitor sensor converts the raw impedance changes from a 5mm proximity probe into a linear voltage signal proportional to the distance between the probe tip and the target shaft. It provides the critical data interface for monitoring both static (axial position) and dynamic (radial vibration) shaft displacement. We supply this unit as 100% Brand New and Original, ensuring high-fidelity signal transmission for your 3300 or 3500 machinery protection racks.

Technical Specifications

Engineering Advantages

• High-Precision Eddy Current Sensing: The 18745-03 utilizes eddy current technology to achieve non-contact measurements. This eliminates mechanical wear and allows the sensor to detect sub-micron changes in shaft position without touching the rotating equipment.

• Low-Frequency Accuracy: Unlike seismic sensors, this Proximitor maintains accuracy down to 0 Hz (DC). This capability enables the monitoring of static parameters like thrust position and thermal expansion, which are vital for preventing internal component rubbing.

• Broad Frequency Spectrum: The module handles frequencies up to 10 kHz, capturing high-order vibration harmonics. This allows maintenance teams to diagnose complex mechanical issues such as oil whirl, rotor unbalance, and blade pass frequencies.

• Environmental Resilience: Bently Nevada builds the 7200 series to survive the oil-saturated, high-temperature environments of turbine housings. The internal circuitry remains stable despite the extreme thermal cycling common in power generation and petrochemical plants.

• Direct Signal Conditioning: The 18745-03 eliminates the need for external amplifiers. It outputs a standard voltage signal that integrates directly with legacy 7200 racks or modern 3500 systems using the appropriate I/O interface.

FAQs

• Can I use a 3300 XL 8mm probe with this 18745-03 7200 series Proximitor?

  No. The 18745-03 is specifically calibrated for the 7200 Series 5mm probes. Mixing components from different series (like 7200 and 3300 XL) or different probe diameters will cause significant linearity errors and scale factor inaccuracies.

• What is the correct input power for this module?

  The 18745-03 requires a -24 VDC power supply, which is standard for Bently Nevada monitoring racks. Reversing the polarity or using a positive voltage source will damage the internal electronics.

• Is the 18745-03 still supported for new installations?

  The 7200 series is a legacy product line. While Bently Nevada recommends the 3300 XL series for new projects, the 18745-03 remains an essential spare part for maintaining the thousands of existing 7200 systems worldwide.

• Does this unit include a warranty?

  Yes. Every 18745-03 we sell is Brand New and Original. We provide a standard 12-month factory-equivalent warranty to guarantee the performance and reliability of the sensor in your machinery protection loop.