21000-34-05-20-018-04-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

Introduction to the Bently Nevada 21000-34-05-20-018-04-02

When reliable vibration monitoring is critical for rotating machinery, the 21000-34-05-20-018-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is designed for use with 3300 XL 8 mm probes and includes a connector protector for hazardous area approvals. With a 0.5 m (20 in) probe cable, a 2.0 in standoff adapter, and 1.8 in probe penetration, it delivers precise measurements in demanding industrial environments.

Key Features & Technical Specs of the 21000-34-05-20-018-04-02

• Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals
• Probe Cable Length: 0.5 m (20 in)
• Standoff Adapter: 2.0 in
• Probe Penetration: 1.8 in
• Fitting Option: One 3/4-14 NPT plug only
• Mounting Thread: 3/4-14 NPT
• Material: Aluminum body with 304 stainless steel sleeve
• Maximum (C) + (D) Dimension: 13.5 in (34.3 cm)
• Weight: 1.1 kg (2.4 lb) typical, without fittings

A distinctive feature is the 0.5 m probe cable, which allows for compact installations near the measurement point. This reduces signal loss and simplifies routing in tight spaces.

Applications & Use Cases

Engineers commonly use the 21000-34-05-20-018-04-02 in turbine, compressor, and pump monitoring systems. Its CSA Type 4 enclosure rating makes it suitable for outdoor and washdown environments. Additionally, the housing meets API 670 standards for externally mounted proximity probes, ensuring compatibility with industry-standard vibration monitoring setups.

Installation & Setup

Mount the housing using the 3/4-14 NPT thread on the standoff adapter. Ensure the probe tip is correctly positioned at the 1.8 in penetration depth for accurate gap measurements. Use the included 3/4-14 NPT plug to seal unused conduit ports. Always follow Bently Nevada's installation manual for proper torque and alignment.

Maintenance & Reliability

Regularly inspect the O-rings and thread seal for wear to maintain the CSA Type 4 enclosure integrity. The aluminum body with stainless steel sleeve resists corrosion in harsh environments. Periodic checks of the probe cable and connector ensure consistent signal quality. This housing design minimizes downtime by providing easy access to the probe for replacement or adjustment.

Compatibility & Integration

The 21000-34-05-20-018-04-02 works with Bently Nevada 3300 XL 8 mm proximity probes and is compatible with most Bently Nevada monitoring systems. The housing can be ordered with hazardous area approvals for intrinsically safe applications. For explosion-proof requirements, select the CA version with appropriate options.

Troubleshooting & Common Issues

If signal instability occurs, check the probe cable for damage or loose connections. Verify that the standoff adapter is correctly torqued to the housing. For intermittent readings, inspect the O-rings for compression set or cuts. Always consult the Bently Nevada manual for detailed troubleshooting steps.

FAQ about the 21000-34-05-20-018-04-02

What is the probe cable length for this housing assembly?

The 21000-34-05-20-018-04-02 includes a 0.5 m (20 in) probe cable.

What type of probe does this housing support?

It supports the 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.

What is the standoff adapter length?

The standoff adapter length is 2.0 in.

What is the mounting thread size?

The mounting thread is 3/4-14 NPT.

Is this housing rated for hazardous areas?

Yes, when ordered with appropriate options, the CA version is rated explosion-proof by CSA.

Product Support & Availability

The 21000-34-05-20-018-04-02 is in stock and ready to ship from Petro Auto Tech. Contact our team for pricing and lead time. We provide original factory-sealed units with full manufacturer warranty.