21000-28-05-00-092-03-02 | Bently Nevada 8 mm Probe Housing Assembly

What Makes the 21000-28-05-00-092-03-02 a Reliable Choice for Hazardous Area Monitoring?

When machinery vibration monitoring demands robust performance in explosive environments, the 21000-28-05-00-092-03-02 Bently Nevada proximity probe housing assembly delivers a secure solution. This assembly combines a durable aluminum body with a 304 stainless steel sleeve and a 3300 XL 8 mm probe. It is designed for external mounting per API 670 standards. The unit supports selectable hazardous area approvals and includes a 0.5 m (20 in) probe cable for flexible installation.

Key Features and Technical Specs of the 21000-28-05-00-092-03-02

• Probe Option: 28 – 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 05 – 0.5 m (20 in).
• Probe Penetration: 092 – 9.2 in.
• Fitting Option: 03 – One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip with grommets for cable sizes 1/8 to 3/16 in, 1/4 to 5/16 in, and 5/16 to 3/8 in.
• 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: 13.5 in (34.3 mm) with 0.5 m cable (probe not visible).
• Certifications: CSA Type 4 enclosure, explosion-proof for hazardous areas, RoHS compliant.

A standout feature is the 9.2-inch probe penetration, which allows the sensor to reach deep into the measurement zone while maintaining a sealed housing. This reduces installation complexity and improves measurement accuracy in tight spaces.

Real-World Applications for the 21000-28-05-00-092-03-02

This housing assembly is ideal for monitoring vibration on rotating machinery such as compressors, turbines, and pumps in oil and gas, petrochemical, and power generation facilities. Its CSA certification for Class I Divisions 1 and 2 Groups C and D makes it suitable for hazardous locations. The assembly also meets API 670 standards for externally mounted proximity probes, ensuring compatibility with industry-standard monitoring systems.

Installation and Setup Guidance

Mount the housing using the 3/4-14 NPT thread option. If a standoff adapter is not required, select the 00 option. Ensure the cable seal grip grommets match the cable diameter (1/8 to 3/16 in, 1/4 to 5/16 in, or 5/16 to 3/8 in). Tighten all fittings to maintain the explosion-proof seal. For non-incendive circuits, follow drawing 140979. Verify the probe tip is properly positioned before final tightening.

Maintenance and Reliability Tips

Inspect the housing periodically for signs of corrosion or seal degradation, especially in harsh environments. The aluminum body with stainless steel sleeve resists corrosion, but routine checks ensure long-term reliability. Replace O-rings if leakage is detected. Always follow the manufacturer's safety manual when servicing equipment in hazardous areas.

Compatibility and Integration

The 21000-28-05-00-092-03-02 works with Bently Nevada monitoring systems that accept 3300 XL 8 mm probes. The assembly is fully compliant with API 670, making it interchangeable with other API 670-compliant housings. For intrinsically safe applications, order hazardous area approved probes with this housing.

Common Questions About the 21000-28-05-00-092-03-02

Q: What is the probe penetration length of this assembly?

A: The probe penetration is 9.2 inches (092 suffix).

Q: What cable length is included with the probe?

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

Q: Is this housing suitable for explosion-proof applications?

A: Yes, it is CSA certified for explosion-proof use in Class I Divisions 1 and 2 Groups C and D, and is a Type 4 enclosure.

Q: What mounting thread does the 02 option provide?

A: The 02 mounting thread option is 3/4-14 NPT.

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

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

Product Support and Availability

The 21000-28-05-00-092-03-02 is available from Petro Auto Tech in new and original factory packaging with a 12-month warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.