21000-34-10-30-039-03-02 | Bently Nevada 1.0 m Cable Proximity Probe Housing Assembly

Introduction: Solving Vibration Monitoring Challenges with the 21000-34-10-30-039-03-02

When a rotating machinery failure threatens production uptime, engineers need a robust solution for accurate vibration measurement. The 21000-34-10-30-039-03-02 Bently Nevada proximity probe housing assembly addresses this challenge by providing a durable, explosion-proof enclosure for critical asset monitoring. Designed for hazardous areas, this assembly integrates a 3300 XL 8 mm probe with connector protector and offers selectable hazardous area approvals. Its aluminum body with a 304 stainless steel sleeve ensures long-term reliability in demanding industrial environments.

Key Features and Technical Specifications

• Model: 21000 Proximity Probe Housing Assembly with 3300 XL 8 mm probe and connector protector.
• Probe Cable Length: 1.0 m (39 in) for flexible installation.
• Standoff Adapter: 3.0 mm (30 option) to optimize probe positioning.
• Probe Penetration: 3.9 in (039 option) for accurate gap measurement.
• Fitting Option: Includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and cable seal grip with grommets for cable sizes 1/8 to 3/16 in, 1/4 to 5/16 in, and 5/16 to 3/8 in.
• Mounting Thread: 3/4-14 NPT (option -02) for secure installation.
• Material: Aluminum body with 304 stainless steel sleeve for corrosion resistance.
• Maximum Probe Cable Length (visible P/N and S/N): 17.0 in (43.18 cm).
• Maximum Dimension (C + D): 32.9 in (83.5 cm).
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

A distinctive spec is the 3.0 mm standoff adapter, which ensures consistent probe-to-target gap for reliable vibration readings. This precision reduces measurement errors in high-speed machinery.

Real-World Applications and Use Cases

In oil and gas refineries, the 21000-34-10-30-039-03-02 is ideal for monitoring compressor and pump vibrations in hazardous areas. Its CSA Type 4 enclosure and API 670 compliance make it suitable for external mounting on rotating equipment. For example, a petrochemical plant can use this assembly to detect early bearing wear, preventing unplanned downtime. Additionally, power generation facilities benefit from its explosion-proof rating for turbine monitoring.

Installation and Setup Guide

Mount the housing using the 3/4-14 NPT thread option for a secure fit. Ensure the standoff adapter (3.0 mm) is correctly positioned to achieve the desired probe penetration of 3.9 in. The included fitting kit provides a 3/4-14 NPT plug, reducer, and cable seal grip with grommets for various cable sizes. Always follow Bently Nevada's manual for proper torque and alignment. Verify the probe cable length of 1.0 m meets your routing requirements before finalizing installation.

Maintenance and Reliability Tips

Regularly inspect the O-rings and thread seal for wear to maintain the explosion-proof integrity. The aluminum body with stainless steel sleeve resists corrosion, but periodic cleaning of the dome cover is recommended. Check the cable seal grip grommets for cracking, especially in high-temperature environments. Following these steps extends service life and reduces replacement costs.

Compatibility and Integration

This housing assembly integrates with Bently Nevada monitoring systems and accepts 3300 XL 8 mm proximity probes. It is fully compliant with API 670 for externally mounted probe housings. The CSA Type 4 enclosure ensures compatibility with hazardous area installations. For system integration, refer to the official Bently Nevada documentation.

Common Questions About the 21000-34-10-30-039-03-02

Q: What is the probe cable length for this assembly?

A: The probe cable length is 1.0 m (39 in), as indicated by the suffix code 10.

Q: Is this housing suitable for hazardous areas?

A: Yes, it is rated explosion proof for hazardous areas with CSA approvals and is available with intrinsically safe probe options.

Q: What mounting thread does the -02 option provide?

A: The -02 mounting thread option is 3/4-14 NPT, required when the standoff adapter length is not -00.

Q: What is the weight of the assembly without fittings?

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

Q: Does this assembly include conduit fittings?

A: Yes, the fitting option includes a 3/4-14 NPT plug, a 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets.

Product Support and Availability

The 21000-34-10-30-039-03-02 is available as new and original in factory packing from Petro Auto Tech. Contact our team for current stock and lead times. We provide a 12-month factory warranty for your peace of mind.