21000-34-05-00-018-03-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

Solving Challenging Vibration Monitoring with the 21000-34-05-00-018-03-02

When a refinery faced persistent false alarms from external proximity probe installations, engineers needed a robust housing that could withstand harsh conditions while maintaining signal integrity. The 21000-34-05-00-018-03-02 from Bently Nevada delivered a reliable solution with its aluminum body and 304 stainless steel sleeve, ensuring durability and consistent performance.

Key Features and Technical Specifications

• The 21000-34-05-00-018-03-02 uses a 3300 XL 8 mm probe with connector protector for selectable hazardous area approvals.
• It includes a 0.5 m (20 in) probe cable length for flexible installation in tight spaces.
• The assembly features a 1.8 in probe penetration and a 3/4-14 NPT mounting thread.
• Fittings include one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for multiple cable sizes.
• The housing is rated as CSA Type 4 enclosure and complies with API 670 Standard for externally mounted proximity probe housings.
• Typical weight is 1.1 kg (2.4 lb) without fittings, and the maximum (C) + (D) dimension is 13.5 in (34.3 cm).

Real-World Applications

In petrochemical plants, the 21000-34-05-00-018-03-02 is ideal for monitoring shaft vibration in compressors and turbines. Its explosion-proof CSA rating makes it suitable for hazardous areas where safety is critical. Additionally, the assembly supports intrinsically safe applications when paired with approved proximity probes, reducing the risk of ignition in volatile environments.

Installation and Setup

Mounting the 21000-34-05-00-018-03-02 requires a 3/4-14 NPT conduit connection. The included fittings simplify wiring: attach the cable seal grip to secure the probe cable, then connect the reducer if a smaller conduit is needed. Ensure the probe sleeve length matches the required gap for accurate readings. Always follow Bently Nevada's manual for proper torque and alignment.

Maintenance and Reliability

Regular inspection of the O-rings and conduit fittings helps maintain the CSA Type 4 enclosure rating. The aluminum body resists corrosion, while the stainless steel sleeve protects the probe from wear. Periodic checks of the cable seal grip prevent moisture ingress, extending service life and reducing unplanned downtime.

Compatibility and Integration

The 21000-34-05-00-018-03-02 integrates seamlessly with Bently Nevada monitoring systems and other vibration analysis equipment. Its CSA certification ensures compatibility with hazardous area installations worldwide. For optimal performance, pair it with a compatible Bently Nevada proximity probe and monitor.

Frequently Asked Questions

What is the cable length of the 21000-34-05-00-018-03-02?

The probe cable length is 0.5 m (20 in), as indicated by the suffix code 05.

Is the housing explosion-proof?

Yes, the housing is rated explosion-proof by CSA when ordered with appropriate options, such as E:00, E:01, E:02, or E:04.

What mounting thread does this assembly use?

It uses a 3/4-14 NPT mounting thread, which is required when the standoff adapter option is not -00.

Can this housing be used in intrinsically safe applications?

Yes, when paired with hazardous area approved proximity probes, the 21000 housing supports intrinsically safe applications.

Product Support and Availability

The 21000-34-05-00-018-03-02 is available as new and original in factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current lifecycle status and ordering details.