21000-34-00-30-030-03-02 | Bently Nevada 3.0 in Probe Housing Assembly

Introduction to the 21000-34-00-30-030-03-02

When machinery reliability demands precise vibration monitoring, the 21000-34-00-30-030-03-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is part of the 21000 series, engineered for hazardous area applications with CSA Type 4 enclosure certification. It combines an aluminum body with a 304 stainless steel sleeve for durability in demanding industrial environments.

Key Features and Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals
• Standoff Adapter: 3.0 in (30 suffix code)
• Probe Penetration: 3.0 in (030 suffix code)
• Mounting Thread: 3/4-14 NPT (suffix code -02)
• Fittings Included: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip with grommets for cable sizes 1/8 to 3/8 inches
• Material: Aluminum body with 304 stainless steel sleeve
• Probe Cable Length: 1.0 m
• Maximum (C) + (D) with visible probe P/N and S/N: 17.0 in (43.18 cm)
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm)
• Weight: 1.1 kg (2.4 lb) typical, without fittings

A standout feature is the 3.0 in standoff adapter, which allows precise positioning of the probe relative to the shaft, ensuring accurate vibration readings even in tight installations.

Applications and Use Cases

Engineers rely on the 21000-34-00-30-030-03-02 for critical rotating machinery such as turbines, compressors, and pumps. Its CSA explosion-proof rating makes it suitable for oil and gas, petrochemical, and power generation facilities. The assembly fully complies with API 670 standards for externally mounted proximity probe housings, ensuring consistent performance in harsh conditions.

Installation Guide

Mounting the housing requires a 3/4-14 NPT threaded opening. The included fittings simplify conduit connections: use the reducer for 1/2-14 NPT conduit, and select the appropriate cable seal grip grommet based on cable diameter (1/8 to 3/8 inches). Ensure the standoff adapter is properly torqued to maintain the 3.0 in probe penetration depth for optimal measurement accuracy.

Maintenance and Reliability

Regular inspection of the O-rings and conduit seals helps maintain the explosion-proof integrity. The stainless steel sleeve resists corrosion, extending service life in wet or corrosive environments. Periodic verification of the probe cable and connector ensures uninterrupted signal transmission.

Compatibility and Integration

The 21000-34-00-30-030-03-02 works with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitoring systems. It integrates seamlessly into existing vibration monitoring architectures, supporting both new installations and retrofits.

Frequently Asked Questions

Q: What is the standoff adapter length for the 21000-34-00-30-030-03-02?

A: The standoff adapter is 3.0 inches (suffix code 30).

Q: What mounting thread does this housing require?

A: It uses a 3/4-14 NPT thread (suffix code -02).

Q: Is the housing suitable for hazardous areas?

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

Q: What probe cable length is included?

A: The probe cable length is 1.0 meter.

Q: What fittings come with the assembly?

A: It includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cables from 1/8 to 3/8 inches.

Product Support and Availability

The 21000-34-00-30-030-03-02 is in stock and ready to ship from Petro Auto Tech. Contact our team for pricing and lead time. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.