21000-34-05-15-066-03-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the 21000-34-05-15-066-03-02?

When machinery vibration monitoring demands robust and precise sensing, the 21000-34-05-15-066-03-02 from Bently Nevada delivers a complete proximity probe housing assembly. This model integrates a 3300 XL 8 mm probe with connector protector, a 0.5 m (20 in) probe cable, a 1.5 in standoff adapter, and a 6.6 in probe penetration. The assembly includes a 3/4-14 NPT plug, a 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for multiple cable sizes. It is designed for hazardous area approvals and is CSA certified as explosion-proof and Type 4 enclosure.

Key Features and Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in).
• Standoff Adapter: 1.5 in.
• Probe Penetration: 6.6 in.
• Mounting Thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Fitting Option: Includes one 3/4-14 NPT plug, one reducer, and cable seal grip for cable sizes 1/8 to 3/8 inches.

A distinctive spec is the 6.6 in probe penetration, which allows deep insertion into bearing housings for accurate proximity measurements in tight spaces.

Real-World Applications

In rotating machinery like turbines, compressors, and pumps, the 21000-34-05-15-066-03-02 provides reliable vibration and position monitoring. Its CSA explosion-proof rating makes it suitable for hazardous environments such as oil refineries and chemical plants. Additionally, the assembly complies with API 670 standards for externally mounted proximity probes, ensuring industry-standard performance.

Installation Guide

Mount the housing using the 3/4-14 NPT thread into a suitable conduit or machine port. Ensure the probe cable length of 0.5 m is sufficient for the routing path. The standoff adapter of 1.5 in sets the correct gap between probe tip and target. Use the included cable seal grip with appropriate grommets for cable diameters between 1/8 and 3/8 inches. Tighten all fittings to prevent moisture ingress.

Routine Care and Reliability

Periodically inspect the housing for signs of corrosion or damage, especially in harsh environments. Verify that the cable seal grip remains tight and that the probe tip is clean. The aluminum body with stainless steel sleeve offers long-term durability. Regular inspection helps maintain measurement accuracy and extends service life.

Compatibility and Integration

The 21000-34-05-15-066-03-02 integrates with Bently Nevada monitoring systems that accept 8 mm proximity probes. It works with standard 3/4-14 NPT conduit fittings and is compatible with intrinsically safe barriers when ordered with appropriate options. For detailed system integration, refer to the Bently Nevada manual.

Common Questions About the 21000-34-05-15-066-03-02

Q: What is the probe cable length for this assembly?

A: The probe cable length is 0.5 m (20 in).

Q: What mounting thread does the housing use?

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

Q: Is this housing CSA certified for hazardous areas?

A: Yes, the CA version of the housing is rated explosion-proof by CSA when ordered with the E:00, E:01, E:02, or E:04 options.

Q: What materials are used in the housing construction?

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

Q: What is the weight of the assembly?

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

Product Support and Availability

The 21000-34-05-15-066-03-02 is available in new and original factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.