21000-28-10-00-094-04-02 | Bently Nevada 9.4 in Probe Housing Assembly

Introduction to the 21000-28-10-00-094-04-02

When industrial machinery demands precise vibration monitoring in hazardous environments, the 21000-28-10-00-094-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is part of the trusted 21000 series, engineered for external mounting per API 670 standards. With a 9.4 inch probe penetration and a 1.0 meter cable length, it fits seamlessly into critical asset protection systems.

Key Features & Technical Specifications

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals
• Probe Cable Length: 1.0 m (39 in)
• Probe Penetration: 094 = 9.4 in
• Fitting Option: One 3/4-14 NPT plug only
• Mounting Thread: 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 visible probe

This assembly includes a dome cover, threaded ports, probe sleeve, O-rings, reverse mount probe, thread seal, and optional conduit fittings. The 21000-28-10-00-094-04-02 is certified as CSA Type 4 enclosure and rated explosion proof for hazardous areas.

Applications & Use Cases

Engineers rely on the 21000-28-10-00-094-04-02 for vibration monitoring in rotating machinery such as turbines, compressors, and pumps. Its CSA certification for Class I Divisions 1 and 2 Groups C and D makes it suitable for oil and gas, petrochemical, and power generation facilities. The housing meets API 670 standards for externally mounted proximity probes, ensuring consistent performance in harsh conditions.

Installation & Setup

Mount the housing using the 3/4-14 NPT thread option. Connect the probe cable (1.0 m length) through the threaded ports. Ensure the standoff adapter is not required (option 00). For hazardous area installations, follow the wiring per drawing 140979 to maintain non-incendive circuit compliance. The assembly supports conduit connections for secure routing.

Maintenance & Reliability

Regularly inspect the O-rings and thread seal for wear. Verify the dome cover is tight to maintain enclosure integrity. The aluminum body with stainless steel sleeve resists corrosion in industrial environments. Periodic checks of the probe cable and connector ensure consistent signal transmission. For long-term reliability, follow Bently Nevada's recommended inspection intervals.

Compatibility & Integration

The 21000-28-10-00-094-04-02 integrates with Bently Nevada monitoring systems that accept 3300 XL 8 mm proximity probes. It is compatible with CSA-approved intrinsically safe applications when paired with appropriate barriers. The housing works with both 21000 aluminum and 24701 stainless steel variants for different environmental needs.

Troubleshooting & Common Issues

If signal loss occurs, check the probe cable connection and verify the 1.0 m cable is not damaged. Ensure the mounting thread (3/4-14 NPT) is properly sealed to prevent moisture ingress. For erratic readings, inspect the probe tip for debris and confirm the penetration depth of 9.4 in is correct. Always refer to the official Bently Nevada manual for detailed diagnostics.

FAQ about 21000-28-10-00-094-04-02

What is the probe penetration of the 21000-28-10-00-094-04-02?

The probe penetration is 094, which equals 9.4 inches.

What certifications does this housing have?

It is CSA certified for explosion-proof applications in Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, G, and Class III. It is also RoHS compliant.

What is the cable length of the probe?

The probe cable length is 1.0 meter (39 inches).

What material is the housing made of?

The housing has an aluminum body with a 304 stainless steel sleeve.

What mounting thread does this model use?

It uses a 3/4-14 NPT mounting thread.

Product Support & Availability

The 21000-28-10-00-094-04-02 is available as new and original in factory packing from Petro Auto Tech. It ships with a 12-month factory warranty. Contact Petro Auto Tech for current lifecycle status and ordering details.