21000-34-00-20-030-04-02 | Bently Nevada 8 mm Probe Housing Assembly

What Makes the 21000-34-00-20-030-04-02 Essential for Hazardous Areas?

When industrial environments demand explosion-proof monitoring, the 21000-34-00-20-030-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly combines an aluminum body with a 304 stainless steel sleeve for durability. It supports selectable hazardous area approvals, making it a trusted choice for oil and gas, petrochemical, and power generation applications.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector for hazardous areas.
• Standoff Adapter: 2-inch length for precise positioning.
• Probe Penetration: 3 inches into the housing.
• Fitting Option: One 3/4-14 NPT plug only.
• Mounting Thread: 3/4-14 NPT (required when standoff adapter is not -00).
• Material: Aluminum body with 304 stainless steel sleeve.
• Probe Cable Length: 1.0 m (maximum C + D dimension 17.0 in or 43.18 cm).
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

The 8 mm probe size is distinctive for tight installations. This allows reliable proximity sensing in confined spaces common in turbine and compressor monitoring.

Real-World Applications

Industries use the 21000-34-00-20-030-04-02 for shaft vibration and position monitoring. It excels in hazardous areas due to its CSA explosion-proof rating. For example, in a gas compressor station, this housing protects the probe from harsh conditions while maintaining accurate readings. The API 670 compliance ensures it meets industry standards for externally mounted proximity probes.

Installation Guide

Mount the housing using the 3/4-14 NPT thread. Attach the standoff adapter (2-inch) for proper probe clearance. Use the included 3/4-14 NPT plug for unused ports. Ensure the probe cable (1.0 m) is routed without sharp bends. The aluminum body with stainless steel sleeve resists corrosion in outdoor or wet environments.

Routine Care & Reliability

Regularly inspect the O-rings and thread seal for wear. Verify the dome cover is tight to maintain explosion-proof integrity. The stainless steel sleeve prevents galling during installation. This design reduces downtime by simplifying probe replacement without removing the entire housing.

Compatible Systems

The 21000-34-00-20-030-04-02 integrates with Bently Nevada monitoring systems. It accepts 3300 XL 8 mm proximity probes for vibration and displacement measurements. The CSA Type 4 enclosure rating allows outdoor use in non-hazardous areas as well.

Troubleshooting & Common Issues

If readings become erratic, check the probe cable for damage. Ensure the connector protector is secure. Verify the standoff adapter length (2 inches) matches installation requirements. For persistent issues, consult the Bently Nevada manual or contact Petro Auto Tech.

FAQs about 21000-34-00-20-030-04-02

Q: What probe type does this housing support?

A: It supports the 3300 XL 8 mm probe with connector protector for hazardous areas.

Q: What is the mounting thread size?

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

Q: Is this housing explosion-proof?

A: Yes, it is CSA rated explosion proof for hazardous areas and certified as CSA Type 4 enclosure.

Q: What is the probe penetration depth?

A: The probe penetration is 3 inches (option 030).

Q: What materials are used in construction?

A: The body is aluminum with a 304 stainless steel sleeve for corrosion resistance.

Product Support & Availability

The 21000-34-00-20-030-04-02 is in stock and ready to ship from Petro Auto Tech. We provide new, factory-sealed units with original packaging. Contact our team for technical support or ordering assistance.