The Bently Nevada 21000-28-05-15-050-03-02 is a robust aluminum proximity probe housing assembly designed for external mounting of reverse-mount proximity probes in machinery condition monitoring systems. It is explosion-proof (CSA approved), suitable for hazardous environments, and fully complies with API 670 standards. The assembly includes a dome cover, threaded ports, probe sleeve, and optional accessories such as conduit fittings and standoff adapters.

Applications

• Turbomachinery monitoring

• Compressors and pumps

• Gearboxes and motors

• Critical rotating equipment in oil & gas, petrochemical, and power generation plants

• Environments requiring CSA Type 4 or explosion-proof enclosures

Advantages

• Compatible with Bently Nevada 3300 XL series proximity probes

• CSA certified explosion-proof housing

• Fully API 670 compliant

• Modular configuration with customizable probe length, penetration, and fittings

• Supports long probe sleeves with optional oil seal

• Operates in extreme temperatures (up to +177°C)

• Rugged aluminum housing with corrosion resistance

Technical Specifications

Frequently Asked Questions (FAQ)

Q1: What types of probes are compatible with the 21000 housing?

A1: The housing is compatible with Bently Nevada 3300 XL 8mm, 11mm, and NSv reverse-mount probes.

Q2: Is the housing explosion-proof?

A2: Yes, it meets CSA certification for Class I, II, and III hazardous locations and is rated explosion-proof.

Q3: Can this assembly be installed in outdoor or corrosive environments?

A3: Yes, the aluminum body with stainless steel sleeve and CSA Type 4 rating ensures it withstands harsh conditions.

Q4: What is the maximum length of probe penetration allowed?

A4: Up to 742 mm, depending on the probe cable length and standoff adapter used.

Q5: What is the operating temperature range of the housing?

A5: It operates from -51°C to +177°C and is also suitable for storage within this range.

Q6: Are custom probe sleeves supported?

A6: Yes, custom sleeves can be ordered depending on machine geometry and penetration requirements.

Q7: Is sleeve support required for long probes?

A7: Yes, for sleeve lengths over 304 mm (12 in), support (e.g., part 37948-01) is recommended to reduce resonance.

Q8: Can I use the 21000 housing in non-North American installations?

A8: Yes, standard 21000 (non-CA) models are suitable; CA models are restricted to North American use.

Q9: What conduit fittings are available?

A9: Options include explosion-proof NPT fittings, plugs, reducers, and cable grips.

Q10: Does the housing come with a probe included?

A10: No, the probe is selected as part of the ordering options and may be included based on configuration.