21000-34-05-20-065-04-02 | Bently Nevada 8 mm Probe Housing Assembly

Introduction to the 21000-34-05-20-065-04-02

When industrial machinery demands precise vibration monitoring in hazardous environments, the 21000-34-05-20-065-04-02 from Bently Nevada provides a robust solution. Part of the 21000 series, this proximity probe housing assembly is engineered for external mounting per API 670 standards. It combines an aluminum body with a 304 stainless steel sleeve for durability in harsh conditions.

This model features a 3300 XL 8 mm probe with connector protector, selectable hazardous area approvals, and a 0.5 m (20 in) probe cable. The assembly includes a dome cover, threaded ports, probe sleeve, O-rings, reverse mount probe, thread seal, and optional conduit fittings. With CSA Type 4 enclosure certification, it is rated explosion-proof for hazardous areas.

Key Features and Technical Specs of the 21000-34-05-20-065-04-02

• Probe Option: 3300 XL 8 mm probe with connector protector and selectable hazardous area approvals.
• Probe Cable Length: 0.5 m (20 in) for flexible installation.
• Standoff Adapter: 2.0 in for precise positioning.
• Probe Penetration: 6.5 in for deep measurement.
• Fitting Option: One 3/4-14 NPT plug only; explosion-proof fittings available for CA versions.
• Mounting Thread: 3/4-14 NPT required unless standoff adapter is -00.
• Material: Aluminum body with 304 stainless steel sleeve for corrosion resistance.
• Weight: 1.1 kg (2.4 lb) typical without fittings.
• Maximum Dimension (C + D): 13.5 in (34.3 cm) with visible probe P/N and S/N not visible.

One distinctive feature is the 8 mm probe size, which allows for accurate vibration measurement in tight spaces. This spec directly impacts reliability by enabling early fault detection in rotating machinery.

Industry Applications for the 21000-34-05-20-065-04-02

In petrochemical plants, refineries, and power generation facilities, the 21000-34-05-20-065-04-02 monitors shaft vibration and position on turbines, compressors, and pumps. Its CSA explosion-proof rating makes it ideal for Class I, Division 1 hazardous areas. Additionally, the API 670 compliance ensures compatibility with standard vibration monitoring systems, reducing integration time.

Installation and Setup for the 21000-34-05-20-065-04-02

Mount the housing using the 3/4-14 NPT thread option for secure attachment. Ensure the standoff adapter length matches the required gap. The probe cable length of 0.5 m allows for close coupling to the monitoring system. Use the provided O-rings and thread seal to maintain environmental integrity. For explosion-proof installations, select CA version housings with appropriate fitting options.

Maintenance and Reliability of the 21000-34-05-20-065-04-02

Regularly inspect the O-rings and thread seal for wear to maintain the CSA Type 4 enclosure rating. The aluminum and stainless steel construction resists corrosion in harsh environments. Periodically verify the probe cable connection and connector protector integrity. This proactive approach extends service life and reduces unplanned downtime.

Compatibility and Integration of the 21000-34-05-20-065-04-02

The 21000-34-05-20-065-04-02 integrates with Bently Nevada vibration monitoring systems and third-party data acquisition units. It accepts standard 8 mm proximity probes and is compatible with API 670 compliant installations. For hazardous areas, ensure the probe and housing approvals match the zone requirements.

FAQ about the 21000-34-05-20-065-04-02

Q: What is the probe cable length for the 21000-34-05-20-065-04-02?

A: The probe cable length is 0.5 m (20 in) as per the suffix code 05.

Q: Is the 21000-34-05-20-065-04-02 explosion-proof?

A: Yes, when ordered with CA version housing and appropriate fitting options (E:00, E:01, E:02, or E:04), it is rated explosion-proof by CSA.

Q: What is the mounting thread option for this model?

A: The mounting thread option is 3/4-14 NPT, required unless the standoff adapter length is -00.

Q: What material is the housing made of?

A: The housing has an aluminum body with a 304 stainless steel sleeve.

Q: What is the weight of the 21000-34-05-20-065-04-02?

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

Product Support and Availability

The 21000-34-05-20-065-04-02 is in stock and ready to ship from Petro Auto Tech. Contact our team for pricing and lead time. We provide original factory-packed units with full warranty.