21000-34-05-30-018-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-34-05-30-018-04-02

When rotating machinery requires precise vibration monitoring, the 21000-34-05-30-018-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is part of the trusted 21000 series, engineered for harsh industrial environments. It combines an aluminum body with a 304 stainless steel sleeve for durability. The unit supports a 3300 XL 8 mm probe with connector protector, making it suitable for hazardous area approvals. With a 0.5 m probe cable length, it provides flexibility in tight installations.

Key Features and Technical Specs of the 21000-34-05-30-018-04-02

• Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in).
• Standoff Adapter: 3.0 in.
• Probe Penetration: 1.8 in.
• Fitting Option: One 3/4-14 NPT plug only.
• Mounting Thread: 3/4-14 NPT (required unless standoff adapter is -00).
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum (C) + (D) Dimension: 13.5 in (34.3 cm).

A distinctive spec is the 0.5 m probe cable length, which allows for close-coupled installations in confined spaces. This reduces signal loss and simplifies routing.

Applications and Use Cases

In the oil and gas industry, the 21000-34-05-30-018-04-02 monitors shaft vibration in compressors and turbines. Its CSA Type 4 enclosure rating ensures protection against dust and water ingress. Moreover, the housing complies with API 670 standards for externally mounted proximity probes. This makes it a reliable choice for critical rotating equipment in refineries and power plants.

Installation and Setup Guide

Mount the housing using the 3/4-14 NPT thread option for secure conduit connections. Ensure the standoff adapter is set to 3.0 in and the probe penetration to 1.8 in. Use the included 3/4-14 NPT plug for unused ports. Verify the probe cable length of 0.5 m is sufficient for your routing path. Always follow Bently Nevada's manual for proper torque and sealing.

Maintenance and Reliability Tips

Regularly inspect the O-rings and thread seal for wear to maintain enclosure integrity. Check the probe sleeve for any signs of corrosion or damage. Since the housing is rated explosion-proof (when ordered with CA version and E:00 options), periodic verification of seals is essential. This proactive approach extends service life and reduces unplanned downtime.

Compatibility and Integration

The 21000-34-05-30-018-04-02 integrates with Bently Nevada monitoring systems and third-party vibration analyzers. It accepts 3300 XL probes with connector protectors for intrinsic safety. The housing is fully compliant with API 670, ensuring seamless integration into existing machinery protection schemes.

Frequently Asked Questions

Q: What is the maximum probe cable length for the 21000-34-05-30-018-04-02?

A: The probe cable length is 0.5 m (20 in) as specified in the ordering information.

Q: Is the 21000-34-05-30-018-04-02 suitable for hazardous areas?

A: Yes, it supports selectable hazardous area approvals with the 3300 XL 8 mm probe and connector protector.

Q: What materials are used in the housing construction?

A: The housing has an aluminum body with a 304 stainless steel sleeve for corrosion resistance.

Q: What is the weight of the 21000-34-05-30-018-04-02?

A: The typical weight is 1.1 kg (2.4 lb) without fittings.

Q: Does this housing comply with API 670 standards?

A: Yes, it is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings.

Product Support and Availability

The 21000-34-05-30-018-04-02 is in stock and ready to ship from Petro Auto Tech. As an industrial automation parts supplier, we ensure fast delivery and 12-month factory warranty. Contact us for lifecycle status and bulk pricing.