21000-28-10-30-095-03-02 | Bently Nevada 9.5 in Probe Housing Assembly

What Is the 21000-28-10-30-095-03-02?

When rotating machinery in hazardous areas demands precise vibration monitoring, the 21000-28-10-30-095-03-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is part of the 21000 series, engineered for explosion-proof environments. It combines an aluminum body with a 304 stainless steel sleeve for durability. The assembly includes a dome cover, threaded conduit ports, and a probe sleeve. It also comes with O-rings, a reverse mount proximity probe, and a thread seal. Optional conduit fittings and a standoff adapter are available. This housing is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings.

Key Features & Technical Specs

• Probe Option: 28 = 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 10 = 1.0 m (39 in).
• Standoff Adapter: 30 = 3 in.
• Probe Penetration: 095 = 9.5 in.
• Fitting Option: 03 includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip for 1/8 to 3/8 inches cable sizes.
• Mounting Thread: 02 = 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm) with 1.0 m cable.

A distinctive spec is the 9.5 in probe penetration, which allows deep insertion into bearing housings for accurate proximity measurements. This feature is critical for detecting shaft vibration in large rotating equipment.

Industry Applications

Engineers in oil and gas, petrochemical, and power generation industries rely on the 21000-28-10-30-095-03-02 for turbine and compressor monitoring. Its CSA Type 4 enclosure rating ensures protection against dust and water ingress. The assembly is certified for Class I Divisions 1 and 2 Groups C and D, making it suitable for explosive gas atmospheres. Additionally, it meets Class II Divisions 1 and 2 Groups E, F, and G for combustible dust. This versatility reduces the need for multiple housing types across different plant areas.

Installation Guide

Mount the housing using the 3/4-14 NPT thread option. Ensure the standoff adapter is correctly selected for the required probe clearance. The fitting option includes all necessary conduit adapters and cable seals. For hazardous areas, connect the circuit per drawing 140979 to maintain non-incendive operation. Always verify the probe cable length (1.0 m) matches the distance from the probe to the monitor. Use the provided cable seal grip grommets for cable diameters from 1/8 to 3/8 inches.

Routine Care

Periodically inspect the O-rings and thread seal for wear. Check the dome cover for tightness to maintain the explosion-proof seal. Verify the conduit connections remain secure. The aluminum body resists corrosion, but in harsh environments, inspect for pitting. Follow the manufacturer's manual for any disassembly procedures. Regular inspection helps avoid unplanned downtime and extends service life.

Compatible Systems

The 21000-28-10-30-095-03-02 works with Bently Nevada 3300 XL 8 mm proximity probes. It integrates with Bently Nevada monitoring systems for vibration and position measurement. The housing is designed for external mounting per API 670 standards. For intrinsically safe applications, order hazardous area approved probes with this housing. The CSA certification ensures compatibility with North American safety requirements.

Common Questions

Q: What is the probe penetration of the 21000-28-10-30-095-03-02?

A: The probe penetration is 9.5 inches, as indicated by the 095 suffix code.

Q: What cable length does this housing assembly include?

A: It includes a 1.0 m (39 in) probe cable.

Q: Is the 21000-28-10-30-095-03-02 suitable for hazardous areas?

A: Yes, it is CSA certified for explosion-proof applications in Class I Divisions 1 and 2 Groups C and D, and Class II Divisions 1 and 2 Groups E, F, and G.

Q: What mounting thread option is used?

A: The mounting thread option is 3/4-14 NPT.

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

A: The typical weight is 1.1 kg (2.4 lb).

Product Support & Availability

The 21000-28-10-30-095-03-02 is in stock and ready to ship from Petro Auto Tech. It comes as new and original in factory packing with a 12-month warranty. Contact Petro Auto Tech for lifecycle status and ordering assistance.