Bently Nevada 21000-33-10-00-070-04-02 Proximity Probe Housing Assembly

Description

The 21000-33-10-00-070-04-02 is an aluminum proximity probe housing assembly designed for the external mounting of eddy-current transducers. This specific configuration features the 3300 XL NSv probe (Option 33), including a connector protector and provisions for selectable hazardous area approvals. It is equipped with a 1.0 m (39 in) probe cable (Option 10) and a 7.0 inch probe penetration length (Option 070), without a standoff adapter (Option 00). The assembly utilizes a single 3/4-14 NPT plug (Option 04) for conduit connections and a 3/4-14 NPT mounting thread (Option 02).

These housings are built to comply with the American Petroleum Institute (API) 670 Standard for externally mounted proximity probe housings. The 21000 series is constructed from an aluminum body with a 304 stainless steel sleeve, providing a durable enclosure for sensitive vibration monitoring components in demanding industrial environments.

Features

• Probe: 3300 XL NSv probe with connector protector (Option 33)
• Cable Length: 1.0 m (39 in) integral cable (Option 10)
• Standoff Adapter: None (Option 00)
• Probe Penetration: 7.0 inches (Option 070)
• Fittings: One 3/4-14 NPT plug (Option 04)
• Mounting Thread: 3/4-14 NPT (Option 02)
• Construction: Aluminum body with 304 stainless steel sleeve
• Compliance: API 670 Standard compliant

Applications

Used extensively in rotating machinery protection systems to house proximity probes for shaft vibration and axial position measurement. Ideal for petrochemical, power generation, and oil and gas facilities where external probe mounting is required for monitoring critical assets like steam turbines, compressors, and pumps.

Ordering Information

Technical Specifications

Installation Guidelines

Ensure the probe lead is longer than the sleeve to prevent tension. For sleeve lengths exceeding 304 mm (12 in), additional support is required to minimize vibration-induced resonance. Follow the installation guide for your specific probe type (3300 XL NSv) to ensure correct gap settings and proper environmental sealing.

Compliance and Certifications

This housing assembly is certified by CSA for explosion-proof applications in Class I, Division 1 and 2, Groups C and D; Class II, Division 1 and 2, Groups E, F, and G; and Class III environments. It is compliant with the RoHS Directive 2011/65/EU.