21000-28-05-20-030-04-02 | Bently Nevada 0.5m Cable Proximity Probe Housing Assembly

Introduction to the 21000-28-05-20-030-04-02 Bently Nevada Proximity Probe Housing Assembly

When monitoring critical rotating machinery in hazardous environments, engineers need robust and certified solutions. The 21000-28-05-20-030-04-02 from Bently Nevada delivers exactly that. This proximity probe housing assembly combines an aluminum body with a 304 stainless steel sleeve for durability. It includes a 3300 XL 8 mm probe with a 0.5 m (20 in) cable. The assembly also features a 2 in standoff adapter and a 3 in probe penetration. A single 3/4-14 NPT plug fitting completes the package. This unit is designed for reliable vibration monitoring in demanding industrial settings.

Key Features and Technical Specifications of the 21000-28-05-20-030-04-02

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in).
• Standoff Adapter: 2 in length.
• Probe Penetration: 3 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.
• Certifications: CSA explosion-proof for Class I Divisions 1 and 2 Groups C and D, Class II Divisions 1 and 2 Groups E, F, G, Class III, Enclosure Type 4, T5 @ Ta = -50°C to +40°C, T4 @ Ta = -50°C to +80°C. Compliant with RoHS Directive 2011/65/EU and API 670 Standard.

The 0.5 m cable length is a distinctive spec that allows for close coupling to the machine, reducing signal noise and simplifying installation in tight spaces. This assembly is fully compliant with API 670, ensuring it meets industry standards for externally mounted proximity probes.

Real-World Applications for the 21000-28-05-20-030-04-02

This housing assembly is ideal for monitoring shaft vibration and position in turbines, compressors, pumps, and other rotating equipment. It is particularly suited for hazardous areas where explosion-proof certification is required. For example, in a refinery, the 21000-28-05-20-030-04-02 can be installed on a critical compressor to provide continuous vibration data, helping prevent unplanned downtime. Its CSA Type 4 enclosure rating also makes it suitable for outdoor installations exposed to weather.

Installation and Setup Guidance

Mount the housing using the 3/4-14 NPT thread. Ensure the probe penetration of 3 in is correctly set for the target gap. The standoff adapter of 2 in helps position the probe correctly. Use the provided 3/4-14 NPT plug for the conduit connection. Always follow Bently Nevada's installation manual for precise gap setting and wiring. Verify that the probe cable length of 0.5 m is sufficient for the routing path before finalizing the installation.

Maintenance and Reliability Tips

Regularly inspect the housing for signs of corrosion or damage, especially in harsh environments. Check that all fittings remain tight to maintain the explosion-proof seal. The aluminum body with stainless steel sleeve offers good corrosion resistance, but periodic inspection is recommended. For long-term reliability, verify that the probe and cable are free from mechanical stress. The 21000-28-05-20-030-04-02 is built for extended service life in demanding conditions.

Compatibility and Integration

This housing assembly is designed for use with Bently Nevada 3300 XL 8 mm proximity probes. It integrates seamlessly with Bently Nevada monitoring systems. The assembly is fully compliant with API 670, ensuring compatibility with standard mounting configurations. For hazardous area installations, ensure the probe selected has the appropriate approvals matching the housing's CSA certification.

Frequently Asked Questions About the 21000-28-05-20-030-04-02

Q: What is the probe cable length for the 21000-28-05-20-030-04-02?

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

Q: What certifications does the 21000-28-05-20-030-04-02 hold?

A: It is CSA certified for explosion-proof areas and complies with RoHS and API 670 standards.

Q: What is the mounting thread size for this housing?

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

Q: What is the weight of the 21000-28-05-20-030-04-02?

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

Q: What material is the housing made of?

A: The body is aluminum with a 304 stainless steel sleeve.

Product Support and Availability

The 21000-28-05-20-030-04-02 is available from Petro Auto Tech in new and original factory packaging. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current stock levels and ordering information.