Description

The 21000-16-05-00-074-04-02 is a robust proximity probe housing assembly designed for industrial machinery monitoring. This configuration specifies the 3300 XL 8 mm probe series (Option 16), a 0.5 m probe cable (Option 05), no standoff adapter (Option 00), a 7.4-inch probe penetration (Option 074), one 3/4-14 NPT plug (Option 04), and a 1/2-14 BSP mounting thread (Option 02). As part of the Bently Nevada 21000 series, this housing is engineered with an aluminum body and a 304 stainless steel sleeve to provide secure, protective mounting for eddy-current proximity probes. It complies with API 670 standards for externally mounted housings. This unit is intended for applications where reliable shaft vibration and axial position measurement are required in heavy industrial environments such as power generation and petrochemical facilities.

Features

• 3300 XL 8 mm probe configuration (Option 16)
• 0.5 m (20 in) probe cable length (Option 05)
• No standoff adapter installed (Option 00)
• 7.4 in (188 mm) probe penetration depth (Option 074)
• Fittings configured with one 3/4-14 NPT plug (Option 04)
• 1/2-14 BSP mounting thread interface (Option 02)
• Aluminum body construction with 304 stainless steel sleeve
• Compatible with API 670 standard for proximity probe housings

Applications

• Rotating machinery shaft vibration monitoring
• Axial position and thrust measurement
• Power generation, oil and gas, and petrochemical rotating equipment
• Externally mounted proximity probe protection in industrial environments

Ordering Information

Option	Code	Description
Orderable Part Number	21000-16-05-00-074-04-02	21000 Proximity Probe Housing Assembly
A - Probe	16	3300 XL 8 mm probe
B - Cable Length	05	0.5 m (20 in)
C - Standoff Adapter	00	No standoff adapter
D - Probe Penetration	074	7.4 in (188 mm)
E - Fittings	04	One 3/4-14 NPT plug only
F - Mounting Thread	02	1/2-14 BSP

Technical Specifications

Parameter	Specification
Manufacturer	Bently Nevada (Baker Hughes)
Model	21000
Body Material	Aluminum with 304 stainless steel sleeve
Probe Compatibility	3300 XL 8 mm
Weight	1.1 kg (2.4 lb)
Operating Temperature	-51 degC to +177 degC

Installation Guidelines

• Ensure the probe lead is longer than the sleeve length during installation.
• For probe penetration lengths (C+D) exceeding 300 mm (12 in), install additional sleeve support to minimize vibration-induced resonance.
• When probe penetration is between 1.0 and 2.0 inches, counter-boring the machine case may be required to reduce side-view or rear-view effects.
• Use appropriate sealant and thread care for NPT/BSP connections to maintain environmental integrity.