Bently Nevada 21000-28-05-00-105-04-026 Proximity Probe Housing Assemblies

Description

21000-28-05-00-105-04-02 is a robust proximity probe housing assembly designed for industrial machinery protection and condition monitoring. This configuration includes a 3300 XL 8mm probe (Option 28) with selectable hazardous area approvals, providing precise eddy-current displacement measurement for critical rotating equipment. The housing assembly features an aluminum body with a 304 stainless steel sleeve, ensuring protection for the probe and cable interface in harsh operating environments. This specific unit is configured for a 0.5 m probe cable length (Option 05) and a 10.5-inch probe penetration depth (Option 105). It is supplied without a standoff adapter (Option 00) and includes a 3/4-14 NPT plug (Option 04) for standard conduit interface, with a 3/4-14 NPT mounting thread (Option 02).

Features

• 3300 XL 8mm Probe (Option 28): Provides industry-standard eddy-current shaft vibration and axial position measurement.
• Hazardous Area Capability: Configured for selectable hazardous area approvals, suitable for demanding environments.
• Aluminum Body Construction: Durable housing assembly with 304 stainless steel sleeve for corrosion resistance and mechanical protection.
• Compact Integration: Designed to mount directly to the machine case, shielding the probe lead and connector.
• Fittings (Option 04): Includes a 3/4-14 NPT plug for secure cable entry and conduit sealing.

Applications

• Power generation equipment (turbines, generators)
• Oil and gas processing (compressors, pumps)
• Petrochemical and industrial rotating machinery
• Critical machinery protection where API 670 standards apply

Ordering Information

Orderable Part Number	21000-28-05-00-105-04-02	21000 Proximity Probe Housing Assembly
A - Probe	28	3300 XL 8mm probe, selectable hazardous area approvals
B - Probe Cable Length	05	0.5 m (20 in)
C - Standoff Adapter	00	No standoff adapter
D - Probe Penetration	105	10.5 in (267 mm)
E - Fittings	04	One 3/4-14 NPT plug only
F - Mounting Thread	02	3/4-14 NPT

Technical Specifications

Manufacturer	Bently Nevada (Baker Hughes)
Part Number	21000-28-05-00-105-04-02
Body Material	Aluminum with 304 stainless steel sleeve
Probe Compatibility	3300 XL 8 mm
Weight	1.1 kg (2.4 lb) typical
Operating Temperature	-51 degC to +177 degC (-60 degF to +351 degF)
Mounting Thread	3/4-14 NPT

Installation Guidelines

• Ensure the probe penetration length (Option D) is compatible with the machine case and required nominal gap.
• For penetration lengths between 1.0 and 2.0 inches, counter-boring the machine case may be necessary to mitigate side-view effects.
• If penetration length (C + D) exceeds 300 mm (12 in), additional sleeve support is required to prevent resonance.
• Standard torque requirements apply for NPT conduit connections to maintain environmental seal.