Product Overview

The 330703-000-060-10-11-05 is a high-performance 11 mm proximity transducer from the Bently Nevada 3300 XL series. Engineered for machines requiring a broader linear sensing range than standard 8 mm probes, this sensor provides a 4.0 mm (160 mil) measurement window. It excels in tracking large-scale shaft movements, making it an indispensable tool for monitoring axial position and differential expansion. The probe utilizes advanced FluidLoc technology to maintain the integrity of the monitoring system by preventing the migration of process fluids through the cable interior. This robust design ensures the sensor delivers precise, non-contacting displacement data even in the most demanding industrial environments.

Technical System Architecture

Industrial Applications and Field Use

This 11 mm proximity probe is specifically designed for Turbine Supervisory Instrumentation (TSI) on large rotating assets where mechanical clearances are wider than average. It is frequently deployed on steam turbines, large centrifugal compressors, and heavy-duty gas turbines to monitor axial thrust position and protect against rotor-to-stator contact. Its extended range is also vital for measuring differential expansion—the relative movement between the machine casing and the rotor caused by thermal growth during startup. Because it is rated for hazardous zones, the 330703-000-060-10-11-05 is a standard selection for refineries, chemical processing plants, and offshore energy platforms where explosive atmospheres are present.

FAQ

Q: Why would I use an 11 mm probe like the 330703 instead of a standard 8 mm probe?

A: The 11 mm probe offers a much larger linear measurement range (4.0 mm) compared to the 8 mm probe (2.0 mm). This is necessary for monitoring machines with high axial float or significant thermal expansion where a standard probe would go "out of range."

Q: What is the primary benefit of the FluidLoc cable feature?

A: FluidLoc is a proprietary cable construction that blocks the internal path of the cable. This prevents oil, water, or gases from "wicking" through the cable and leaking into the Proximitor housing or other external electrical enclosures, preserving the machine's pressure seal.

Q: Is the 330703-000-060-10-11-05 compatible with 3300 XL 8 mm Proximitor sensors?

A: No. The 11 mm probe requires a specific 3300 XL 11 mm Proximitor sensor. Using it with an 8 mm sensor will result in incorrect scale factors and inaccurate data because the magnetic field and calibration requirements are different for the larger probe tip.

Q: Does this probe include a connector protector?

A: Yes, this model (option 11) includes the connector protector. This is a crucial accessory that shields the ClickLoc connection from environmental contaminants like dust, moisture, and corrosive vapors common in engine rooms.

Q: Can this probe be used in high-temperature turbine sections?

A: Yes, the 3300 XL 11 mm probes are designed for a wide temperature range, typically rated for operation in environments up to +177°C (+350°F), making them suitable for installation near turbine bearings and hot machine casings.