21000-28-10-20-028-04-02 | Bently Nevada 8 mm Proximity Probe Housing Assembly

Introduction to the 21000-28-10-20-028-04-02

When hazardous area monitoring demands reliable vibration sensing, the 21000-28-10-20-028-04-02 from Bently Nevada delivers a robust solution. This proximity probe housing assembly is part of the 21000 series, designed for externally mounted probes in demanding industrial environments. It combines an aluminum body with a 304 stainless steel sleeve for durability and corrosion resistance.

Key Features and Technical Specifications

• Probe Option: 3300 XL 8 mm probe with selectable hazardous area approvals
• Probe Cable Length: 1.0 m (39 in)
• Standoff Adapter: 2 in
• Probe Penetration: 2.8 in
• Fitting Option: One 3/4-14 NPT plug only
• Mounting Thread: 3/4-14 NPT
• 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

The 8 mm probe size is a distinctive spec that enables precise proximity measurements in tight spaces. This assembly supports both standard and intrinsically safe applications, making it versatile for various hazardous area classifications.

Applications and Use Cases

Industries such as oil and gas, petrochemical, and power generation rely on the 21000-28-10-20-028-04-02 for critical machinery monitoring. It is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings. For example, in a refinery, this assembly helps monitor compressor shaft vibration, preventing unplanned downtime. Similarly, in a turbine application, its explosion-proof rating ensures safe operation in Class I Division 1 areas.

Installation and Setup

Mounting the 21000-28-10-20-028-04-02 requires a 3/4-14 NPT threaded port. The standoff adapter must be ordered unless the option is 00. Ensure the probe cable length of 1.0 m is sufficient for the installation distance. The assembly includes a dome cover, threaded ports, probe sleeve, O-rings, reverse mount proximity probe, thread seal, and optional conduit fittings. Follow the manufacturer's manual for proper wiring and grounding to maintain hazardous area certifications.

Maintenance and Reliability

Regular inspection of the 21000-28-10-20-028-04-02 ensures long-term reliability. Check O-rings and seals for wear, and verify that the probe cable is not stressed. The aluminum and stainless steel construction resists corrosion in harsh environments. For maximum uptime, schedule periodic verification of the probe's output per Bently Nevada guidelines. This proactive approach reduces the risk of false readings and extends service life.

Compatibility and Integration

The 21000-28-10-20-028-04-02 integrates with Bently Nevada monitoring systems that accept 8 mm proximity probes. It is certified as a CSA Type 4 enclosure and is fully compliant with API 670. For intrinsically safe applications, order hazardous area approved probes with the housing. The assembly supports both North American (CA21000) and international (21000) certifications, ensuring global applicability.

Frequently Asked Questions

Q: What is the probe cable length for the 21000-28-10-20-028-04-02?

A: The probe cable length is 1.0 m (39 in).

Q: Is the 21000-28-10-20-028-04-02 suitable for hazardous areas?

A: Yes, it is available with CSA explosion-proof certification for Class I Divisions 1 and 2 Groups C and D, and other classifications.

Q: What mounting thread does this assembly use?

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

Q: What is the weight of the 21000-28-10-20-028-04-02?

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

Q: Does the 21000-28-10-20-028-04-02 comply with API 670?

A: Yes, it is fully compliant with the American Petroleum Institute's API 670 Standard.

Product Support and Availability

The 21000-28-10-20-028-04-02 is available as new and original in 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.