21000-34-05-20-018-03-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

Introduction to the 21000-34-05-20-018-03-02 Proximity Probe Housing Assembly

When machinery reliability demands precise vibration monitoring in harsh environments, the 21000-34-05-20-018-03-02 from Bently Nevada delivers a proven solution. This Proximity Probe Housing Assembly is engineered for hazardous area applications, combining an aluminum body with a 304 stainless steel sleeve for durability. With a 0.5 m (20 in) probe cable and selectable hazardous area approvals, it meets the rigorous standards of the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings.

Key Features and Technical Specifications of the 21000-34-05-20-018-03-02

• 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, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes 1/8 to 3/8 inches.
• Mounting Thread: 3/4-14 NPT (required when standoff adapter length is not -00).
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Temperature Range: Operating and storage -51°C to +177°C (-60°F to +351°F) for 3300 XL 8 mm probe.
• CSA Approvals: Explosion proof for hazardous areas; CSA Type 4 enclosure.

The distinctive feature of this assembly is its integrated 0.5 m probe cable, which simplifies installation in tight spaces while maintaining signal integrity. This design reduces the risk of cable damage during mounting, a common failure point in vibration monitoring systems.

Industry Applications for the 21000-34-05-20-018-03-02

In petrochemical refineries and gas processing plants, the 21000-34-05-20-018-03-02 provides reliable shaft vibration monitoring for compressors, turbines, and pumps. Its CSA Type 4 enclosure and explosion-proof rating make it suitable for Class I, Division 1 hazardous locations. Additionally, the assembly's compliance with API 670 ensures compatibility with existing Bently Nevada monitoring systems, reducing integration effort. For power generation facilities, this housing assembly offers long-term stability in high-temperature environments up to 177°C.

Installation and Setup Guide

Mount the 21000-34-05-20-018-03-02 using the 3/4-14 NPT thread for secure attachment to the machine casing. The included fitting kit provides a 3/4-14 NPT plug, a reducer to 1/2-14 NPT, and a cable seal grip with grommets for various cable sizes. Ensure the probe penetration of 1.8 in is correctly set to achieve the proper gap between the probe tip and the shaft. The standoff adapter of 2.0 in helps position the probe at the optimal distance. Always follow Bently Nevada's installation manual for torque specifications and wiring guidelines.

Maintenance and Reliability Tips

To maximize the service life of the 21000-34-05-20-018-03-02, inspect the O-rings and thread seal periodically for signs of wear or corrosion. The aluminum body and stainless steel sleeve resist environmental degradation, but regular checks of the cable seal grip ensure moisture does not enter the housing. In high-vibration applications, verify that the mounting thread remains tight. Following these steps reduces unplanned downtime and extends the assembly's operational life, delivering long-term cost savings.

Compatibility and Integration

The 21000-34-05-20-018-03-02 is designed for use with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitoring systems. Its CSA Type 4 enclosure and hazardous area approvals allow integration into safety-instrumented systems requiring explosion-proof components. The assembly's standard 3/4-14 NPT fitting ensures compatibility with common conduit systems, simplifying retrofits in existing installations.

Frequently Asked Questions about the 21000-34-05-20-018-03-02

Q: What is the maximum cable length for the 21000-34-05-20-018-03-02?

A: The probe cable length is 0.5 m (20 in) as specified in the ordering information.

Q: Is the 21000-34-05-20-018-03-02 suitable for hazardous area applications?

A: Yes, it is available with CSA approvals for explosion-proof hazardous areas and is rated as a CSA Type 4 enclosure.

Q: What is the weight of the 21000-34-05-20-018-03-02 without fittings?

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

Q: What probe types are compatible with this housing assembly?

A: It is designed for the 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.

Q: What is the operating temperature range for the 3300 XL 8 mm probe in this assembly?

A: The operating and storage temperature range is -51°C to +177°C (-60°F to +351°F).

Product Support and Availability

The 21000-34-05-20-018-03-02 is available as new and original in factory packing from Petro Auto Tech. Each unit comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.