21000-34-00-00-095-04-02 | Bently Nevada 9.5 in Probe Housing Assembly

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

When an industrial rotating machine requires reliable vibration monitoring in a hazardous environment, the 21000-34-00-00-095-04-02 from Bently Nevada delivers a proven solution. This proximity probe housing assembly is engineered for externally mounted probes, meeting the API 670 Standard. It combines an aluminum body with a 304 stainless steel sleeve for durability. The assembly includes a dome cover, threaded ports, a probe sleeve, O-rings, and a reverse mount probe. It is rated explosion proof and CSA Type 4, making it suitable for intrinsically safe applications.

Key Features and Technical Specifications

• Model: 21000 Proximity Probe Housing Assemblies
• Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals
• Probe Cable Length: 1.0 m
• Probe Penetration: 9.5 in (095 suffix)
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm)
• Weight: 1.1 kg (2.4 lb) typical, without fittings
• Mounting Thread: 3/4-14 NPT (suffix -02)
• Fitting: One 3/4-14 NPT plug only (suffix 04)
• Material: Aluminum body with 304 stainless steel sleeve

The unique 9.5-inch probe penetration allows precise positioning within the housing for consistent gap measurements. This feature directly supports reliable vibration data collection in tight installations.

Real-World Applications

Engineers commonly use the 21000-34-00-00-095-04-02 in refineries, chemical plants, and gas processing facilities. It mounts externally on compressors, pumps, and turbines to monitor shaft vibration and position. The CSA explosion-proof rating ensures safe operation in Class I, Division 1 areas. Additionally, the API 670 compliance makes it a standard choice for new and retrofit projects. By choosing this assembly, maintenance teams reduce the risk of probe damage from environmental contaminants.

Installation and Setup Guidance

Mount the housing using the 3/4-14 NPT thread option. Ensure the probe sleeve penetrates 9.5 inches into the machine case. Tighten the dome cover securely to maintain the explosion-proof seal. Use the supplied 3/4-14 NPT plug for unused conduit ports. Verify the probe cable length of 1.0 m is sufficient for routing to the junction box. Always follow Bently Nevada’s manual for gap setting and wiring.

Maintenance and Reliability

Periodically inspect the O-rings and thread seal for wear. Check the dome cover for corrosion, especially in outdoor installations. The aluminum and stainless steel construction resists rust and chemical attack. Regular inspection per the manufacturer’s manual helps extend service life. This proactive approach reduces unplanned downtime and replacement costs.

Compatibility and Integration

The 21000-34-00-00-095-04-02 accepts 3300 XL 8 mm proximity probes with connector protectors. It works with Bently Nevada monitoring systems that support eddy-current probes. The CSA Type 4 enclosure allows integration into existing hazardous area installations. No special adapters are needed for standard conduit connections.

Frequently Asked Questions

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

A: The probe cable length is 1.0 m as specified in the ordering data.

Q: Does this assembly include the proximity probe?

A: No, the probe option suffix 34 means the probe is not required; it is ordered separately.

Q: What mounting thread does the 21000-34-00-00-095-04-02 use?

A: It uses a 3/4-14 NPT thread, indicated by suffix -02.

Q: Is this housing suitable for outdoor use?

A: Yes, the aluminum body with stainless steel sleeve and CSA Type 4 rating provides weather resistance.

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

A: This assembly is designed for 3300 XL 8 mm probes; using other sizes may compromise the seal and safety rating.

Product Support and Availability

The 21000-34-00-00-095-04-02 is in stock and ready to ship from Petro Auto Tech. It comes as new and original in factory packing with a 12-month warranty. Contact Petro Auto Tech for lifecycle status and ordering assistance.