21000-34-10-20-065-03-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-34-10-20-065-03-02

When industrial machinery demands precise vibration monitoring in hazardous environments, the 21000-34-10-20-065-03-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is part of the 21000 series, engineered for externally mounted probes in compliance with API 670 standards. With an aluminum body and 304 stainless steel sleeve, it balances durability with corrosion resistance.

Key Features and Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector for selectable hazardous area approvals.
• Cable Length: 1.0 m (39 in) probe cable.
• Standoff Adapter: 2.0 mm standoff adapter included.
• Probe Penetration: 6.5 in (165 mm) penetration depth.
• Mounting Thread: 3/4-14 NPT thread option.
• Fittings: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and cable seal grip for cable sizes from 1/8 to 3/8 inches.
• Weight: 1.1 kg (2.4 lb) typical without fittings.
• Dimensions: Maximum (C)+(D) with visible probe: 17.0 in (43.18 cm); maximum (C)+(D) dimension: 32.9 in (83.5 cm).

One distinctive spec is the 8 mm probe size, which enables accurate measurement in tight mounting spaces common in rotating machinery.

Applications and Use Cases

This housing assembly is ideal for vibration monitoring on compressors, turbines, and pumps in oil and gas, petrochemical, and power generation industries. Its CSA Type 4 enclosure and explosion-proof rating make it suitable for hazardous areas. For example, in a refinery, the 21000-34-10-20-065-03-02 ensures reliable shaft displacement readings even in explosive atmospheres.

Installation Guide

Mount the housing using the 3/4-14 NPT thread option. Ensure the probe sleeve penetrates 6.5 in into the machine case. Connect the 1.0 m cable to the monitoring system using the provided cable seal grip. Verify the standoff adapter is set to 2.0 mm before tightening. Always follow Bently Nevada's mounting instructions for optimal performance.

Maintenance and Reliability

Inspect the O-rings and thread seal annually for wear. Clean the exterior with a dry cloth; avoid solvents. The aluminum and stainless steel construction resists corrosion in humid or corrosive environments. Regular checks help extend service life and reduce unplanned downtime.

Compatibility and Integration

The 21000-34-10-20-065-03-02 works with Bently Nevada monitoring systems that accept 8 mm proximity probes. It is compatible with standard 3/4-14 NPT conduit fittings. For intrinsically safe applications, pair with hazardous area approved probes. Refer to the system manual for integration details.

Comparison with Similar Products

Compared to the 24701 stainless steel housing, the 21000 aluminum version offers lighter weight (1.1 kg vs. heavier stainless) and similar CSA Type 4 certification. Both meet API 670 standards, but the 21000 is more cost-effective for non-corrosive environments. The 8 mm probe size is common across both, ensuring interchangeability.

FAQs about the 21000-34-10-20-065-03-02

Q: What is the probe cable length?

A: The probe cable length is 1.0 m (39 in).

Q: Is this housing assembly explosion-proof?

A: Yes, it is rated explosion proof for hazardous areas with CSA approvals.

Q: What mounting thread does it use?

A: It uses a 3/4-14 NPT mounting thread.

Q: What is the probe penetration depth?

A: The probe penetration depth is 6.5 in (165 mm).

Q: What materials are used in the housing?

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

Product Support and Availability

The 21000-34-10-20-065-03-02 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.