Bently Nevada 21000-28-05-15-028-04-02 Explosion-Proof Housing API 670

Product Architecture & Overview

• The Bently Nevada 21000-28-05-15-028-04-02 is a precision proximity probe housing.
• Designed for externally mounted vibration monitoring of high-speed rotating assets.
• Features an aluminum body integrated with a 304 stainless steel sleeve.
• Engineered to meet API 670 standards for machinery protection systems.
• The 21000-28-05-15-028-04-02 allows probe adjustment without machine disassembly.
• Optimized for hazardous locations with CSA Explosion-Proof certification.

Configuration Hierarchy: 21000-28-05-15-028-04-02

• 21000 — [Base Model: Aluminum Housing / 304 SS Sleeve]
• -28 — [Probe Option: 3300 XL 8 mm Probe with IS Approvals]
• -05 — [Probe Cable Length: 0.5 meter / 20 inches]
• -15 — [Standoff Adapter: 1.5 inches / 38 mm Extension]
• -028 — [Probe Penetration: 2.8 inches Calibrated Depth]
• -04 — [Fitting Option: One 3/4-14 NPT Plug]
• -02 — [Mounting Thread: 3/4-14 NPT Interface]

Global PLC Spare HUB's Insight

• The 21000-28-05-15-028-04-02 is ideal for machines with recessed mounting points.
• The standoff adapter (-15) ensures the housing clears machine insulation for easy access.
• Using a 0.5m cable simplifies internal wiring and prevents signal interference.
• This Bently Nevada assembly is a critical spare for API 670 compliant loops.

Technical Matrix & Compliance

• Manufacturer: Bently Nevada
• Model: 21000-28-05-15-028-04-02
• Probe Technology: 3300 XL 8mm Reverse Mount
• Hazardous Rating: CSA Explosion-Proof (Class I, Div 1 & 2)
• Environmental Rating: CSA Type 4 (Weatherproof)
• Penetration Depth: 2.8 inches (Approx. 71mm)
• Mounting Interface: 3/4-14 NPT
• Operating Temp: T4 @ Ta = -50°C to +80°C

Diagnostic & Application Scenarios

• Gap Voltage Monitoring: Enables field adjustment of proximity probes via the dome access.
• Explosion-Proof Protection: Safe for use in Groups C and D hazardous gas environments.
• API 670 Compliance: Standardized mounting for industrial vibration and thrust monitoring.
• Contaminant Shielding: Seals sensitive probe connectors from dust and moisture.

Logistics & Warranty Terms

• Condition: New & Original in Factory Packing.
• Warranty: 12-Month Factory Warranty Included.
• Dispatch: Ready for shipment within 24-48 Hours.
• Shipping: Express delivery via FedEx, UPS, or DHL.

Professional FAQ

• Why is the standoff adapter necessary in this configuration?
• It provides 1.5 inches of clearance to clear machine insulation or lagging.
• Can the 3300 XL probe be replaced without removing the housing?
• Yes, the reverse-mount design allows for probe extraction through the body.
• Does the 0.5m cable length include the extension cable?
• No, an external extension cable is required to connect to the Proximitor Sensor.
• How does the -04 fitting option affect installation?
• It simplifies setup by providing a single NPT plug for unused conduit ports.
• Is this housing suitable for offshore marine environments?
• Aluminum is durable, but stainless steel 24701 variants are better for high-salt spray areas.

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