21000-34-10-00-030-03-02 | Bently Nevada 8 mm Probe Housing Assembly

Product Overview: Bently Nevada 21000-34-10-00-030-03-02 Proximity Probe Housing Assembly

When monitoring critical rotating machinery in hazardous environments, the 21000-34-10-00-030-03-02 from Bently Nevada delivers reliable vibration and position sensing. This proximity probe housing assembly is designed for externally mounted probes in demanding industrial settings. It combines a durable aluminum body with a 304 stainless steel sleeve, ensuring long-term performance in corrosive or explosive atmospheres. The assembly includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount proximity probe, a thread seal, and optional conduit fittings. With CSA Type 4 enclosure certification and explosion-proof ratings, this unit meets strict safety standards for hazardous area installations.

Key Features and Technical Specifications

• Probe Option: 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals.
• Cable Length: 1.0 m (39 in) probe cable.
• Probe Penetration: 3.0 in (76.2 mm).
• Fitting Options: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip with grommets for cable sizes 1/8–3/16 in, 1/4–5/16 in, and 5/16–3/8 in.
• Mounting Thread: 3/4-14 NPT (required when standoff adapter is not used).
• Materials: 21000 aluminum body with 304 stainless steel sleeve.
• Maximum Dimensions: (C)+(D) with visible probe P/N and S/N: 17.0 in (43.18 cm); maximum overall (C)+(D): 32.9 in (83.5 cm).
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Certifications: CSA explosion-proof for hazardous areas; CSA Type 4 enclosure; compliant with API 670 Standard.

A distinctive feature of this assembly is its selectable hazardous area approval for the 3300 XL 8 mm probe. This allows the same housing to be used across different classified zones, simplifying inventory and reducing the risk of incorrect installation.

Applications and Use Cases

The 21000-34-10-00-030-03-02 is ideal for monitoring vibration and shaft position in compressors, turbines, pumps, and other rotating machinery in oil and gas, petrochemical, and power generation facilities. Its CSA explosion-proof rating makes it suitable for Class I, Division 1 and 2 hazardous locations. The API 670 compliance ensures compatibility with standard proximity probe systems used in critical machinery protection. For example, in a refinery, this housing can be mounted externally on a centrifugal compressor to provide reliable radial vibration data without compromising safety.

Installation and Setup

Mount the housing using the 3/4-14 NPT thread option when no standoff adapter is required. Ensure the probe cable length of 1.0 m is adequate for the routing path to the junction box. The included fitting kit provides a 3/4-14 NPT plug, a reducer to 1/2-14 NPT, and a cable seal grip with three grommet sizes to accommodate various cable diameters. Tighten the dome cover securely to maintain the CSA Type 4 enclosure seal. For intrinsically safe applications, use the housing with an approved barrier and follow the manufacturer's wiring diagram.

Maintenance and Reliability

Regularly inspect the O-rings and thread seal for signs of wear or contamination. Verify that the cable seal grip grommets remain intact to prevent moisture ingress. Periodically check the dome cover for tightness and corrosion, especially in harsh chemical environments. The aluminum body and stainless steel sleeve offer excellent resistance to corrosion, reducing maintenance intervals. Following these simple steps helps extend the service life of the assembly and ensures consistent measurement accuracy.

Compatibility and Integration

This housing assembly is designed for use with Bently Nevada 3300 XL 8 mm proximity probes and compatible monitor systems. The CSA Type 4 enclosure rating allows integration into systems requiring NEMA 4X protection. The API 670 compliance ensures the assembly meets industry standards for externally mounted proximity probes, making it a drop-in replacement for existing installations. For systems requiring a standoff adapter, the -00 suffix indicates no adapter is included; order separately if needed.

Frequently Asked Questions

Q: What is the probe cable length for the 21000-34-10-00-030-03-02?

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

Q: What is the probe penetration depth?

A: The probe penetration is 3.0 in (76.2 mm).

Q: Is this housing assembly certified for hazardous areas?

A: Yes, it is CSA explosion-proof certified for hazardous areas and is a CSA Type 4 enclosure.

Q: What fitting options are included?

A: The kit includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes 1/8–3/16 in, 1/4–5/16 in, and 5/16–3/8 in.

Q: What is the mounting thread requirement?

A: The mounting thread is 3/4-14 NPT, required when no standoff adapter is used.

Product Support and Availability

The Bently Nevada 21000-34-10-00-030-03-02 is available as a new, factory-sealed unit from Petro Auto Tech. It ships with a 12-month factory warranty. Contact Petro Auto Tech for current stock levels and lead times.