Product Overview

The Bently Nevada 21000-00-00-00-015-04-02 is a heavy-duty, external mounting enclosure designed for the integration of proximity transducers into industrial machinery monitoring systems. This assembly acts as a protective interface, allowing for the external gapping and replacement of sensors without necessitating a machine shutdown or breaching the primary equipment casing. As a core component of Turbine Supervisory Instrumentation (TSI), it ensures the mechanical stability and environmental protection required for precise shaft vibration and displacement analysis.

This specific model features a 1.5-inch (approx. 38mm) sleeve length (designated by the 015 suffix) and a 0.4-inch probe sleeve opening. It provides a shallow-mount solution for equipment with thin-walled casings or limited internal clearance, maintaining the structural rigidity necessary to eliminate sensor resonance.

Key Technical Characteristics

The 21000 series housing is engineered for high-availability assets where sensor protection and ease of maintenance are paramount.

• High-Grade Aluminum Construction: The all-aluminum body provides a lightweight yet extremely durable shell that is naturally resistant to atmospheric corrosion and harsh industrial chemicals.

• Modular Configuration: Supplied as a housing-only assembly (00-00 probe/cable designation), this unit offers maximum flexibility for site engineers to pair the enclosure with specific 3300 XL proximity probes based on application-specific electrical requirements.

• Environmental Shielding: The assembly features a threaded dome cover and high-performance O-ring seals, creating a weatherproof barrier against oil vapor, moisture ingress, and dust.

• Secure Conduit Interface: Equipped with 3/4-14 NPT threaded ports, the housing facilitates a liquid-tight connection to industrial conduits, safeguarding the transducer leads from mechanical abrasion.

• Simplified Calibration: The external mounting design allows for the adjustment of the probe's DC gap voltage from the exterior of the machine, significantly streamlining maintenance cycles and ensuring API 670 compliance.

Technical Specifications

• Manufacturer: Bently Nevada (Baker Hughes)

• Model Designation: 21000-00-00-00-015-04-02

• Sleeve Length: 1.5 Inches (38.1 mm)

• Probe Opening: 0.4 Inches

• Housing Material: Precision-machined Aluminum

• Threading: 3/4-14 NPT (Includes one NPT plug)

• Operational Temperature: Designed for extreme industrial thermal cycles

• Installation Depth: Minimum 1.4-inch requirement

• Net Weight: 1.08 kg

• Country of Origin: USA

Industrial Applications

The 21000-00-00-00-015-04-02 is widely deployed in the power generation and hydrocarbon processing industries to protect sensors on critical assets such as:

• Centrifugal and axial compressors

• Steam and aero-derivative gas turbines

• Multi-stage high-pressure fluid pumps

• Large-scale industrial fans and blowers