21000-34-10-00-050-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-34-10-00-050-04-02

When monitoring rotating machinery in hazardous environments, the 21000-34-10-00-050-04-02 from Bently Nevada delivers reliable performance. This proximity probe housing assembly combines an aluminum body with a 304 stainless steel sleeve for durability. It supports a 3300 XL 8 mm probe with connector protector, making it ideal for vibration and position sensing.

Part of the 21000 series, this unit features a 1.0 m (39 in) probe cable length. The design includes a dome cover, threaded ports, and optional conduit fittings. Engineers value its CSA Type 4 enclosure rating, which ensures protection against dust and water ingress.

With a typical weight of 1.1 kg (2.4 lb), the assembly is lightweight yet robust. The 3/4-14 NPT mounting thread simplifies installation in existing setups. This model also complies with API 670 standards for externally mounted probes.

Key Features and Technical Specs of the 21000-34-10-00-050-04-02

• Probe Option: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.
• Probe Cable Length: 1.0 m (39 in) for flexible placement near machinery.
• Mounting Thread: 3/4-14 NPT for secure attachment to standard ports.
• Material: Aluminum body with 304 stainless steel sleeve for corrosion resistance.
• Maximum Dimension (C + D): 32.9 in (83.5 cm) to accommodate probe and cable routing.
• Weight: 1.1 kg (2.4 lb) typical, without fittings, reducing installation effort.
• Enclosure Rating: CSA Type 4 for dust and water protection.

One distinctive spec is the 1.0 m cable length, which reduces the need for extension cables. This lowers material costs and minimizes signal loss. The selectable hazardous area approvals also allow use in diverse environments without additional certification expenses.

Applications and Use Cases

In oil and gas refineries, the 21000-34-10-00-050-04-02 monitors shaft vibration in compressors and turbines. Its explosion-proof rating ensures safe operation in Class I, Division 1 areas. Similarly, in chemical plants, the stainless steel sleeve resists corrosive agents, extending service life.

Power generation facilities benefit from its API 670 compliance for externally mounted probes. The assembly also suits water treatment plants where dust and moisture ingress is a concern. By preventing unplanned downtime, this housing assembly reduces maintenance costs over time.

Installation and Setup Guide

Mount the 21000-34-10-00-050-04-02 using the 3/4-14 NPT thread into a standard conduit port. Ensure the probe sleeve penetrates 1.8 in (018 suffix) into the housing for accurate measurement. Tighten the dome cover securely to maintain the CSA Type 4 seal.

For hazardous areas, order the housing with E:00, E:01, E:02, or E:04 options to achieve CSA explosion-proof rating. Route the probe cable through the conduit to avoid sharp bends. Verify the maximum cable length of 32.9 in (83.5 cm) to prevent strain on connections.

Maintenance and Reliability Tips

Inspect the O-rings and thread seal annually for wear. Replace them if cracks or deformation appear to maintain the enclosure integrity. Clean the exterior with a dry cloth; avoid solvents that may damage the aluminum body.

Check the probe cable for cuts or abrasions during routine shutdowns. The stainless steel sleeve resists corrosion, but periodic cleaning of the probe tip ensures accurate readings. Following these steps extends the assembly's life and reduces replacement costs.

Compatibility and Integration

The 21000-34-10-00-050-04-02 works with Bently Nevada monitoring systems that accept 3300 XL 8 mm probes. It integrates with vibration analyzers and position monitors commonly used in rotating machinery protection. The CSA Type 4 rating ensures compatibility with outdoor installations.

For intrinsically safe applications, pair this housing with hazardous area approved probes. The assembly's 3/4-14 NPT thread matches standard conduit fittings, simplifying integration into existing wiring. No special adapters are needed for most industrial setups.

FAQ about the 21000-34-10-00-050-04-02

Q: What is the probe cable length of the 21000-34-10-00-050-04-02?

A: The probe cable length is 1.0 m (39 in) as specified by the 10 suffix code.

Q: Is this housing assembly explosion-proof?

A: Yes, when ordered with E:00, E:01, E:02, or E:04 options, the CA version is CSA-rated explosion-proof.

Q: What mounting thread does the 21000-34-10-00-050-04-02 use?

A: It uses a 3/4-14 NPT thread, which must be ordered if the standoff adapter option is not -00.

Q: What is the maximum overall dimension of this assembly?

A: The maximum C + D dimension is 32.9 in (83.5 cm) including the visible probe with part number and serial number.

Q: What materials are used in the 21000-34-10-00-050-04-02?

A: The body is aluminum, and the sleeve is 304 stainless steel for corrosion resistance.

Product Support and Availability

The 21000-34-10-00-050-04-02 is in stock and ready to ship from Petro Auto Tech. Each unit comes as new and original in factory packing with a 12-month warranty. Contact Petro Auto Tech for lifecycle status and ordering assistance.