21000-34-10-30-030-04-02 | Bently Nevada 8mm Probe Housing Assembly

What Is the 21000-34-10-30-030-04-02?

When machinery vibration monitoring demands a rugged and precise housing solution, the 21000-34-10-30-030-04-02 from Bently Nevada delivers. This proximity probe housing assembly is part of the 21000 series, designed to protect and position a 3300 XL 8 mm probe with connector protector. It features an aluminum body with a 304 stainless steel sleeve, ensuring durability in harsh industrial environments. The assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, and a reverse mount proximity probe. With CSA Type 4 enclosure certification and explosion-proof ratings for hazardous areas, it meets API 670 standards for externally mounted housings.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals.
• Probe Cable Length: 1.0 m (39 in).
• Standoff Adapter: 3.0 in.
• Probe Penetration: 3.0 in.
• Fitting Option: One 3/4-14 NPT plug.
• Mounting Thread: 3/4-14 NPT (required when standoff adapter length is not -00).
• Material: Aluminum body with 304 stainless steel sleeve.
• Maximum Cable + Probe Dimension: 32.9 in (83.5 cm).
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

One distinctive spec is the 3.0-inch standoff adapter, which allows precise positioning of the probe relative to the shaft. This ensures consistent gap settings and reliable vibration data, reducing false alarms and maintenance costs.

Applications & Use Cases

In rotating machinery such as turbines, compressors, and pumps, the 21000-34-10-30-030-04-02 provides accurate proximity measurements for vibration monitoring. It is ideal for hazardous area installations where explosion-proof certification is required. For example, in a refinery, this housing assembly can withstand corrosive atmospheres while delivering stable readings. Additionally, its CSA Type 4 enclosure makes it suitable for outdoor or washdown environments. By choosing this model, engineers can reduce downtime through reliable shaft position tracking.

Installation Guide

Mount the housing using the 3/4-14 NPT thread option. Ensure the standoff adapter is correctly set to 3.0 inches for proper probe clearance. Connect the probe cable (1.0 m length) to the monitoring system, verifying that the connector protector is secure. For explosion-proof installations, use only CSA-approved fittings and follow local wiring codes. Always refer to the Bently Nevada manual for torque specifications and gap adjustment procedures.

Maintenance & Reliability

Regularly inspect the O-rings and thread seal for wear to maintain the housing's environmental seal. Check the probe cable for damage, especially near the connector. The aluminum and stainless steel construction resists corrosion, extending service life in harsh conditions. Periodic verification of the standoff adapter dimension ensures consistent probe positioning. Following these steps helps avoid unplanned downtime and reduces long-term replacement costs.

Compatible Systems

The 21000-34-10-30-030-04-02 integrates with Bently Nevada monitoring systems that accept 3300 XL 8 mm proximity probes. It is compatible with both intrinsically safe and explosion-proof installations, depending on the probe and housing options selected. For system integration, consult the Bently Nevada compatibility matrix or contact Petro Auto Tech for guidance.

FAQs about 21000-34-10-30-030-04-02

Q: What is the maximum cable length for this housing assembly?

A: The probe cable length is 1.0 m (39 in), as specified by the suffix code 10.

Q: Is this housing assembly explosion-proof?

A: Yes, when ordered with the appropriate options (E:00, E:01, E:02, or E:04), the CSA-rated version is explosion-proof for hazardous areas.

Q: What is the weight of the 21000-34-10-30-030-04-02?

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

Q: Can I use this housing with a different probe length?

A: The housing is designed for a 3300 XL 8 mm probe with a 1.0 m cable. For other lengths, refer to Bently Nevada's ordering options.

Product Support & Availability

The 21000-34-10-30-030-04-02 is in stock and ready to ship from Petro Auto Tech. As a new and original factory-packed unit, it comes with a 12-month warranty. Contact Petro Auto Tech for lifecycle status and availability before ordering.