Bently Nevada 3300 XL proximity probe — 5 mm or 8 mm eddy-current probe for shaft radial vibration and axial position measurement on rotating machinery. Applications: steam turbine and centrifugal compressor shaft monitoring, marine main-engine vibration diagnostics. Pairs with 3300 XL extension cable and 3300 XL proximitor for complete measurement chain to a rack-mounted Machinery Protection System. Compatible with 3300 and 3300 XL rack architectures.