24701-28-05-20-024-03-02 Bently Nevada 3300 XL 8mm Sensor Housing

Bently Nevada 24701-28-05-20-024-03-02 Proximity Probe Housing Assembly

The assembly functions as a heavy-duty, environmental shielding enclosure designed to house and protect a reverse-mount proximity probe in harsh industrial process conditions. By utilizing a ruggedized, explosion-proof layout, this mechanical module enables precise shaft vibration and axial position measurements on turbines, compressors, and large rotating machinery while sealing internal electrical links from ambient moisture and hazardous gas leakage.

Technical Specifications

Quick Installation Guide

• Mount the 2.0-inch standoff adapter block into the machine shell using the designated 3/4-14 NPT mating hole thread options.
• Verify that the internal 304 stainless steel probe sleeve extends precisely 2.4 inches into the casing to establish correct geometric alignment over the proximity target.
• Carefully thread the included reverse-mount 3300 XL 8mm probe through the internal guide tube, feeding its 0.5-meter trailing coaxial wire smoothly into the main junction dome area.
• Select the appropriate rubber wire grommet size (ranging from 1/8 to 3/8 inches) inside the cable seal grip to create an airtight lock around your external extension connection line, then screw the outer dome cover tightly into the 303 stainless steel main housing block.

Technical FAQs

Q1: What structural components are integrated inside the 24701 series assembly to shield field equipment?
A1: The complete 1.8 kg setup consists of a heavy-duty dome cover that threads directly into the main housing body, dedicated ports for rigid conduit piping connections, a customized length probe tracking sleeve, specialized synthetic O-rings, a reverse-mount proximity transducer probe, and integrated thread seals. This design maintains atmospheric integrity around the sensor core under high pressures.

Q2: Why is the part and serial number labeled as "Not Visible" under the dimensional configurations?
A2: Due to the 2.4-inch penetration depth and the specific physical orientation of a reverse-mount sensor structure, the internal probe's identification markings reside entirely inside the protective 304 stainless steel sleeve once assembled. These details cannot be visually verified without removing the main 303 stainless steel housing shell from the machine port.

Q3: How do the various grommets included with the 03 fittings option assist in system deployment?
A3: The multi-grommet cable seal kit supports reliable field adaptation by providing tight, pressure-resistant sealing matrices for three distinct outer-diameter ranges: 1/8 to 3/16 inches, 1/4 to 5/16 inches, and 5/16 to 3/8 inches. This allows plant teams to run diverse brands of armored or unarmored coaxial instrument wires without compromising the housing's explosion-proof rating.