21000-34-10-20-050-03-02 | Bently Nevada 1.0m Cable Proximity Probe Housing Assembly

Introduction to the 21000-34-10-20-050-03-02

When vibration monitoring in hazardous environments demands reliable, certified equipment, the 21000-34-10-20-050-03-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is part of the 21000 series, engineered for external mounting per API 670 Standard. It combines an aluminum body with a 304 stainless steel sleeve, ensuring durability in corrosive or explosive atmospheres.

With a 1.0 meter probe cable, 2.0 inch standoff adapter, and 5.0 inch probe penetration, this model fits specific shaft measurement applications. The housing includes a 3/4-14 NPT mounting thread and comes with conduit fittings, making installation straightforward in existing systems.

Key Features and Technical Specifications

• Probe Option: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.
• Probe Cable Length: 1.0 m (39 in).
• Standoff Adapter: 2.0 in.
• Probe Penetration: 5.0 in.
• Mounting Thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm).
• Certifications: CSA Type 4 enclosure, explosion-proof for hazardous areas, compliant with API 670.

One standout feature is the selectable hazardous area approval for the 3300 XL 8 mm probe, which allows the same housing to be used in intrinsically safe applications without modification. This reduces inventory complexity and simplifies compliance.

Applications and Use Cases

Engineers specify the 21000-34-10-20-050-03-02 for critical rotating machinery such as turbines, compressors, and pumps in oil and gas, petrochemical, and power generation facilities. Its CSA explosion-proof rating makes it ideal for Class I, Division 1 hazardous locations. Compared to standard proximity probe housings, this model offers a sealed, corrosion-resistant enclosure that meets API 670 requirements for external mounting, reducing installation time and maintenance costs.

Installation and Setup

Mount the housing using the 3/4-14 NPT thread into a suitable conduit or junction box. The included fittings—one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with three grommet sizes—accommodate various cable diameters. Ensure the probe sleeve penetrates 5.0 inches into the measurement zone and that the standoff adapter is set to 2.0 inches. Verify the probe cable length of 1.0 meter meets your routing needs before final tightening.

Maintenance and Reliability

Regularly inspect the housing for signs of corrosion or damage, especially in harsh environments. The aluminum body and stainless steel sleeve resist most industrial chemicals, but periodic cleaning with a damp cloth and mild detergent is recommended. Check O-rings and seals annually to maintain the CSA Type 4 integrity. Following these steps extends service life and reduces unplanned downtime, aligning with a cost-benefit approach to asset management.

Compatibility and Integration

The 21000-34-10-20-050-03-02 works with Bently Nevada 3300 XL 8 mm proximity probes and standard vibration monitoring systems. It is designed for direct connection to Bently Nevada monitors and can be integrated into distributed control systems (DCS) or plant-wide condition monitoring networks. The CSA certification ensures compatibility with hazardous area installations worldwide.

Frequently Asked Questions

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

A: The probe cable length is fixed at 1.0 m (39 in). For longer runs, use extension cables rated for the environment.

Q: Is the 21000-34-10-20-050-03-02 suitable for intrinsically safe systems?

A: Yes, when paired with a hazardous area approved 3300 XL 8 mm probe, the housing supports intrinsically safe applications per CSA standards.

Q: What mounting thread does this model use?

A: It uses a 3/4-14 NPT thread, which is standard for industrial conduit connections.

Q: Can this housing be used with other probe brands?

A: It is designed specifically for Bently Nevada 3300 XL 8 mm probes. Using other brands may compromise fit and certification.

Q: What is the weight of the assembly?

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

Product Support and Availability

The 21000-34-10-20-050-03-02 is available in stock at Petro Auto Tech, shipped in original factory packaging with a 12-month warranty. Contact our team for lead times and bulk pricing. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.