21000-34-05-30-095-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-34-05-30-095-04-02

When machine vibration threatens uptime, the 21000-34-05-30-095-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is designed for externally mounted probes in hazardous areas. It combines an aluminum body with a 304 stainless steel sleeve for durability. The assembly includes a 3300 XL 8 mm probe with connector protector. It also features a 0.5 m (20 in) probe cable. This model supports selectable hazardous area approvals. It meets API 670 standards for externally mounted housings.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector
• Probe Cable Length: 0.5 m (20 in)
• Standoff Adapter: 3.0 in
• Probe Penetration: 9.5 in
• Fitting Option: One 3/4-14 NPT plug only
• Mounting Thread: 3/4-14 NPT
• Material: Aluminum body with 304 stainless steel sleeve
• Maximum (C) + (D) Dimension: 13.5 in (34.3 cm)
• Weight: 1.1 kg (2.4 lb) typical, without fittings

The 0.5 m cable length is ideal for tight installations. The 9.5 in probe penetration allows deep insertion into bearing housings. This combination reduces installation time and improves measurement accuracy.

Industry Applications & Use Cases

In rotating machinery monitoring, the 21000-34-05-30-095-04-02 excels. It is commonly used on compressors, turbines, and pumps. The CSA Type 4 enclosure rating ensures protection in wet or dusty environments. For hazardous areas, the housing can be ordered with explosion-proof options. This makes it suitable for oil refineries and chemical plants. The assembly also supports intrinsically safe probe connections. Maintenance engineers appreciate the straightforward mounting via 3/4-14 NPT threads.

Installation & Setup

Mount the housing using the 3/4-14 NPT thread. Ensure the standoff adapter is correctly positioned. The probe cable length is fixed at 0.5 m, so plan conduit routing accordingly. Use the provided 3/4-14 NPT plug for unused ports. Verify the probe penetration depth of 9.5 in before final tightening. Always follow Bently Nevada's installation manual for torque values. For hazardous area installations, use only CSA-rated components.

Maintenance & Reliability

Regularly inspect the dome cover and O-rings for wear. Check the probe cable for cuts or abrasions. The aluminum body resists corrosion in most industrial environments. The 304 stainless steel sleeve protects against mechanical damage. Replace O-rings if they show signs of hardening. This proactive approach extends service life and reduces unplanned downtime. The assembly's robust construction supports long-term reliability in continuous operation.

Compatibility & Integration

The 21000-34-05-30-095-04-02 works with Bently Nevada 3300 XL 8 mm proximity probes. It integrates with Bently Nevada monitoring systems. The housing is compatible with standard conduit fittings. The 3/4-14 NPT thread matches common industrial piping. For intrinsically safe systems, use approved probes and barriers. The assembly is also compatible with API 670 compliant installations.

Troubleshooting & Common Issues

If probe signal is noisy, check cable connections and grounding. Verify the probe tip is not contacting the shaft. Ensure the standoff adapter is properly seated. If the housing leaks, inspect O-rings and thread seals. For explosion-proof installations, confirm the correct fitting options are used. Always refer to the Bently Nevada manual for detailed troubleshooting steps.

FAQ about 21000-34-05-30-095-04-02

What is the probe cable length for this model?

The probe cable length is 0.5 m (20 in).

What is the standoff adapter length?

The standoff adapter length is 3.0 in.

What is the probe penetration depth?

The probe penetration depth is 9.5 in.

What mounting thread does the housing use?

The mounting thread is 3/4-14 NPT.

Is this housing rated for hazardous areas?

Yes, when ordered with the appropriate options, it is CSA rated explosion-proof.

Product Support & Availability

The 21000-34-05-30-095-04-02 is in stock at Petro Auto Tech. It ships as new and original in factory packing. Contact Petro Auto Tech for current lead times and bulk pricing. Our team can help with application questions and cross-references.