Product Overview
When machinery reliability is non-negotiable, the Bently Nevada 21000-34-00-20-039-03-02 Proximity Probe Housing Assembly provides a robust mounting solution for vibration monitoring in critical rotating equipment. This industrial automation module is engineered to house a 3300 XL 8 mm probe with connector protector, offering selectable hazardous area approvals. With its aluminum body and 304 stainless steel sleeve, the 21000-34-00-20-039-03-02 delivers durability in demanding environments.
Key Specifications
-
Model: 21000-34-00-20-039-03-02
-
Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals
-
Standoff Adapter: 2 inches
-
Probe Penetration: 3.9 inches
-
Fitting Option: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip with grommets for cable sizes 1/8–3/16, 1/4–5/16, and 5/16–3/8 inches
-
Mounting Thread: 3/4-14 NPT
-
Material: Aluminum body with 304 stainless steel sleeve
-
Probe Cable Length: 1.0 m
-
Maximum (C)+(D) with visible probe (P/N and S/N): 17.0 in (43.18 cm)
-
Maximum (C)+(D) Dimension: 32.9 in (83.5 cm)
-
Weight: 1.1 kg (2.4 lb) typical, without fittings
Technical Breakdown
The 21000-34-00-20-039-03-02 features a 2-inch standoff adapter and a 3.9-inch probe penetration, which positions the probe accurately relative to the shaft. The 3/4-14 NPT mounting thread ensures secure installation in standard conduit ports. The included fitting kit provides flexibility for cable entry, accommodating multiple cable diameters. Weighing only 1.1 kg (2.4 lb), this housing is lightweight yet robust, reducing stress on mounting points.
Applications and Use Cases
This Bently Nevada 21000-34-00-20-039-03-02 is ideal for externally mounted proximity probes in turbo-machinery, pumps, compressors, and generators. In a refinery setting, the housing's CSA Type 4 rating and compliance with API 670 make it suitable for hazardous areas. The 1.0 m probe cable length simplifies routing to the monitor, while the visible probe identification (P/N and S/N) aids in maintenance tracking.
Installation and Setup
When installing the 21000-34-00-20-039-03-02, ensure the mounting thread (3/4-14 NPT) is clean and properly sealed. Use the provided cable seal grip to secure the probe cable, choosing the appropriate grommet for your cable diameter. The standoff adapter must be correctly oriented to achieve the desired probe penetration. Verify that the probe tip is at the recommended gap for optimal performance.
Maintenance and Reliability
Regular inspection of the housing's O-rings and thread seal prevents moisture ingress, extending the life of the internal probe. The aluminum body resists corrosion, while the stainless steel sleeve protects the probe from wear. Periodic checks of the cable connections ensure signal integrity. This housing is designed for long-term reliability, reducing unplanned downtime and maintenance costs.
Compatibility and Integration
The 21000-34-00-20-039-03-02 is compatible with Bently Nevada 3300 XL proximity probe systems. It integrates seamlessly with Bently Nevada monitors and diagnostic equipment. The housing's aluminum and stainless steel construction makes it suitable for intrinsically safe applications when used with approved barriers.
Selection Guide and Purchasing Advice
Before ordering, confirm the probe cable length (1.0 m) and the fitting options meet your installation requirements. Verify the mounting thread size (3/4-14 NPT) matches your existing conduit. For additional support, PLC Source PRO offers genuine Bently Nevada parts with a 12-month warranty. Ensure you select the correct configuration for your hazardous area classification.