21000-34-00-30-050-04-02 | Bently Nevada 3.0 in Standoff Adapter Probe Housing

Introduction to the 21000-34-00-30-050-04-02 Proximity Probe Housing Assembly

When vibration monitoring demands robust protection for sensitive proximity probes, the 21000-34-00-30-050-04-02 from Bently Nevada provides a reliable solution. This housing assembly is part of the 21000 series and is engineered for externally mounted proximity probe applications in industrial environments. It combines an aluminum body with a 304 stainless steel sleeve for durability and corrosion resistance.

The assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount proximity probe, and a thread seal. Optional conduit fittings and a standoff adapter are available to meet specific installation requirements.

Key Features and Technical Specifications of the 21000-34-00-30-050-04-02

The 21000-34-00-30-050-04-02 is designed with specific suffix codes that define its configuration. The probe option is 34, which indicates a 3300 XL 8 mm probe with a connector protector and selectable hazardous area approvals. The probe cable length is 00, meaning no probe cable is required.

• Standoff Adapter: 3.0 inches (30 suffix)
• Probe Penetration: 5.0 inches (050 suffix)
• Fitting Option: One 3/4-14 NPT plug only (04 suffix)
• Mounting Thread: 3/4-14 NPT (-02 suffix)
• Weight: 1.1 kg (2.4 lb) typical, without fittings
• Maximum (C) + (D) Dimension: 32.9 in (83.5 cm)
• Maximum (C) + (D) with Visible Probe P/N and S/N: 17.0 in (43.18 cm)

One distinctive spec is the 3.0-inch standoff adapter, which allows precise positioning of the probe within the housing for accurate vibration measurements. This feature is critical for applications requiring consistent gap settings.

Applications and Use Cases for the 21000-34-00-30-050-04-02

This housing assembly is ideal for rotating machinery monitoring in industries such as oil and gas, power generation, and petrochemicals. It is fully compliant with the American Petroleum Institute's API 670 Standard for externally mounted proximity probe housings. The CSA Type 4 enclosure rating ensures protection against dust and water ingress, making it suitable for harsh environments.

For example, in a refinery application, the 21000-34-00-30-050-04-02 can house a proximity probe to monitor shaft vibration in a large compressor. The explosion-proof rating provides safety in hazardous areas, while the stainless steel sleeve resists corrosive atmospheres.

Installation and Setup for the 21000-34-00-30-050-04-02

Installing the 21000-34-00-30-050-04-02 requires attention to mounting thread specifications. The -02 suffix indicates a 3/4-14 NPT mounting thread, which must be ordered if the standoff adapter length option is not -00. Ensure the conduit connections are properly sealed to maintain the explosion-proof rating.

The housing comes with a 1.0-meter probe cable length. When mounting, verify that the total (C) + (D) dimension does not exceed 32.9 inches to avoid interference. Use the provided O-rings and thread seal to prevent leakage.

Maintenance and Reliability of the 21000-34-00-30-050-04-02

Regular inspection of the housing assembly ensures long-term reliability. Check the O-rings and seals for wear or damage, especially in environments with temperature extremes or chemical exposure. The aluminum body and stainless steel sleeve are designed for low maintenance, but periodic cleaning of the exterior is recommended to prevent debris buildup.

Because the housing is rated explosion-proof, never modify the enclosure or fittings without consulting the manufacturer's manual. Proper maintenance reduces downtime and extends service life, delivering cost savings over time.

Compatibility and Integration of the 21000-34-00-30-050-04-02

The 21000-34-00-30-050-04-02 is compatible with Bently Nevada 3300 XL 8 mm proximity probes and associated monitoring systems. It integrates seamlessly with vibration monitoring racks and data acquisition units. The CSA Type 4 enclosure ensures compatibility with systems requiring hazardous area approvals.

For intrinsically safe applications, order hazardous area approved proximity probes with this housing. Both the 21000 aluminum and 24701 stainless steel housings are certified for such use.

Frequently Asked Questions about the 21000-34-00-30-050-04-02

Q: What is the standoff adapter length for the 21000-34-00-30-050-04-02?

A: The standoff adapter length is 3.0 inches, as indicated by the 30 suffix code.

Q: Is the 21000-34-00-30-050-04-02 rated for hazardous areas?

A: Yes, the housing is available with CSA explosion-proof approvals for hazardous areas when ordered with appropriate options.

Q: What mounting thread does the 21000-34-00-30-050-04-02 use?

A: It uses a 3/4-14 NPT mounting thread, specified by the -02 suffix.

Q: What is the weight of the 21000-34-00-30-050-04-02?

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

Q: What probe is compatible with this housing?

A: It is designed for the 3300 XL 8 mm probe with connector protector, as indicated by the 34 probe option.

Product Support and Availability

The 21000-34-00-30-050-04-02 is available as new and original in factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current lifecycle status and availability before ordering.