21000-34-00-30-018-04-02 | Bently Nevada 8mm Probe Housing Assembly

What Is the 21000-34-00-30-018-04-02?

When machine vibration threatens uptime, the 21000-34-00-30-018-04-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is engineered for externally mounted probes in hazardous areas. It combines an aluminum body with a 304 stainless steel sleeve for durability. The assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount probe, and a thread seal. Optional fittings and standoff adapters are available. This model supports selectable hazardous area approvals, making it suitable for demanding industrial environments.

Key Features & Technical Specs

• Probe Option: 3300 XL 8 mm probe with connector protector for hazardous areas.
• Standoff Adapter: 3.0 inches for precise positioning.
• Probe Penetration: 1.8 inches into the housing.
• Fitting Option: One 3/4-14 NPT plug only.
• Mounting Thread: 3/4-14 NPT (required when standoff adapter is not 0.0 inches).
• Material: Aluminum body with 304 stainless steel sleeve.
• Probe Cable Length: 0.5 meters.
• Maximum Dimension (C + D): 13.5 inches (34.3 cm) with visible probe P/N and S/N not visible.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Certifications: CSA Type 4 enclosure, explosion-proof for hazardous areas (CA versions only).

The 8 mm probe option is a distinctive spec that enables accurate vibration measurement in tight spaces. This feature reduces installation complexity and improves reliability in rotating machinery.

Installation & Setup

Mount the 21000-34-00-30-018-04-02 using the 3/4-14 NPT thread for secure attachment. First, verify that the standoff adapter length matches your application requirements. Then, connect the probe cable (0.5 m included) to the reverse mount probe. Ensure all O-rings are seated properly to maintain the CSA Type 4 enclosure rating. For explosion-proof installations, use only CA housing versions with approved fittings. Always follow Bently Nevada's manual for torque specifications and wiring guidelines.

Maintenance & Reliability

Inspect the housing assembly periodically for signs of wear or corrosion. Check the O-rings and thread seal for integrity during routine maintenance. The aluminum and stainless steel construction resists environmental stress, extending service life. For hazardous area installations, verify that the explosion-proof rating remains intact after any service. Regular inspection per the manufacturer's manual helps prevent unexpected failures and reduces downtime costs.

Compatibility & Integration

The 21000-34-00-30-018-04-02 integrates with Bently Nevada monitoring systems that accept 8 mm proximity probes. It is fully compliant with API 670 Standard for externally mounted probe housings. The assembly works with intrinsically safe barriers when used with hazardous area approved probes. For system integration, consult the Bently Nevada compatibility guide or contact Petro Auto Tech for assistance.

FAQs about the 21000-34-00-30-018-04-02

What is the maximum probe cable length for this housing?

The probe cable length is 0.5 meters as standard. For longer runs, contact Petro Auto Tech for options.

Can this housing be used in explosion-proof applications?

Yes, but only CA versions of the housing are rated explosion-proof by CSA when ordered with specific options (E:00, E:01, E:02, or E:04).

What is the weight of the assembly without fittings?

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

Is the probe P/N and S/N visible after installation?

No, the maximum dimension (C + D) of 13.5 inches does not allow visibility of the probe P/N and S/N.

What materials are used in the housing construction?

The body is aluminum with a 304 stainless steel sleeve for corrosion resistance.

Product Support & Availability

The 21000-34-00-30-018-04-02 is in stock and ready to ship from Petro Auto Tech. We offer new, original factory-packed units with a 12-month warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.