21000-34-00-20-095-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-34-00-20-095-04-02

When reliable vibration monitoring is critical, the 21000-34-00-20-095-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is designed for hazardous area use with CSA explosion-proof approval. It combines an aluminum body with a 304 stainless steel sleeve for durability in harsh industrial environments.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.
• Standoff Adapter: 2.0 in length for precise positioning.
• Probe Penetration: 9.5 in for deep measurement access.
• Fitting Option: One 3/4-14 NPT plug only for conduit connection.
• Mounting Thread: 3/4-14 NPT (required when standoff adapter is not -00).
• Material: Aluminum body with 304 stainless steel sleeve for corrosion resistance.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum Probe Cable Length: 1.0 m.
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm) with visible probe P/N and S/N.
• CSA Type 4 Enclosure: Certified explosion-proof for hazardous areas.

One distinctive spec is the 9.5 in probe penetration, which allows deep insertion into machinery for accurate proximity measurements in tight spaces.

Industry Applications

In rotating machinery monitoring, the 21000-34-00-20-095-04-02 excels at measuring shaft vibration and position. It is fully compliant with API 670 Standard for externally mounted proximity probe housings. This makes it ideal for use in refineries, chemical plants, and other hazardous environments where explosion-proof certification is required.

Installation & Setup

Mount the housing using the 3/4-14 NPT thread option. Connect the probe cable through the 3/4-14 NPT plug fitting. Ensure the standoff adapter is set to 2.0 in for proper gap. Always follow the manufacturer's manual for wiring and torque specifications.

Maintenance & Reliability

Inspect the O-rings and thread seal periodically for wear. The aluminum and stainless steel construction resists corrosion, extending service life. Regular verification of probe clearance helps prevent false readings.

Compatibility & Integration

This assembly works with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitoring systems. It is designed for use with CSA-approved intrinsically safe barriers in hazardous areas.

Comparison with Similar Products

Compared to the 24701 stainless steel housing, the 21000-34-00-20-095-04-02 uses an aluminum body for lighter weight (1.1 kg vs. heavier stainless steel). Both share CSA Type 4 certification and API 670 compliance, but the 21000 is preferred where weight savings matter.

FAQ about 21000-34-00-20-095-04-02

What probe does the 21000-34-00-20-095-04-02 use?

It uses a 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.

What is the standoff adapter length?

The standoff adapter is 2.0 in.

What is the mounting thread option?

The mounting thread is 3/4-14 NPT, required when the standoff adapter length option is not -00.

Is this housing explosion-proof?

Yes, it is CSA Type 4 certified explosion-proof for hazardous areas.

What is the weight of the assembly?

It weighs 1.1 kg (2.4 lb) typical, without fittings.

Product Support & Availability

The 21000-34-00-20-095-04-02 is in stock and ready to ship from Petro Auto Tech. Contact our team for ordering assistance and technical support.