21000-16-05-15-037-01-02 | Bently Nevada 8 mm Probe Housing Assembly

What Is the 21000-16-05-15-037-01-02?

When machinery vibration monitoring demands robust and accurate sensing, the 21000-16-05-15-037-01-02 from Bently Nevada provides a dependable solution. This proximity probe housing assembly is part of the 21000 series, designed for hazardous area applications. It combines an aluminum body with a 304 stainless steel sleeve for durability. The assembly includes a 3300 XL 8 mm probe with a 0.5 m cable. It also features a 1.5 in (38 mm) standoff adapter and a probe penetration of 307 inches. Engineers trust this unit for its explosion-proof certification and compliance with API 670 standards.

Key Features and Technical Specs

• Probe Type: 3300 XL 8 mm proximity probe with connector.
• Cable Length: 0.5 m (20 in) probe cable.
• Standoff Adapter: 1.5 in (38 mm) length.
• Probe Penetration: 307 inches (option D dimension).
• Mounting Thread: 3/4-14 NPT.
• Fittings: One explosion-proof fitting and one plug.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Certifications: CSA explosion-proof for Class 1 Divisions 1 and 2 Groups C and D; Class 2 Divisions 1 and 2 Groups E, F, and G; Enclosure Type 4; T5 @ Ta = -50 °C to +40 °C, T4 @ Ta = -50 °C to +80 °C.
• Compliance: FCC Part 15, RoHS Directive 2011/65/EU.

One distinctive spec is the 307-inch probe penetration. This extended reach allows installation in deep machine casings while maintaining accurate vibration readings. It reduces the need for additional support structures in many setups.

Installation and Setup Guidance

Proper mounting is critical for reliable performance. The 21000-16-05-15-037-01-02 uses a 3/4-14 NPT mounting thread. Ensure the machine case is prepared with a matching threaded port. For probe penetration lengths between 1.0 and 2.0 inches, counter boring may be necessary to reduce side view or rear view effects. If the total probe penetration (C plus D) exceeds 300 mm (12 in), add sleeve support near the probe to prevent resonance. The adjustment range of the probe penetration option D is 13 mm (± 0.5 in). Always follow the manufacturer's manual for torque specifications and wiring details.

Maintenance and Reliability Tips

Regular inspection helps maintain long-term accuracy. Check the O-rings and thread seal for wear during routine maintenance. Verify that the dome cover is securely tightened. The aluminum and stainless steel construction resists corrosion in harsh environments. For hazardous area installations, ensure the explosion-proof fittings remain intact. Periodically test the probe output to confirm consistent signal quality. Following these steps extends service life and reduces unplanned downtime.

Compatibility and Integration

The 21000-16-05-15-037-01-02 integrates with Bently Nevada monitoring systems that accept 8 mm proximity probes. It is compatible with standard vibration monitoring racks and software. The assembly is designed for externally mounted proximity probe housings per API 670. For intrinsically safe applications, use approved proximity probes with this housing. Always verify system compatibility with your existing monitoring equipment before installation.

Frequently Asked Questions

Q: What is the maximum cable length for the 21000-16-05-15-037-01-02?

A: The probe cable length is 0.5 m (20 in). For longer runs, consult Bently Nevada documentation for extension options.

Q: Can this housing be used in Class 1 Division 1 areas?

A: Yes, it is CSA certified for Class 1 Divisions 1 and 2 Groups C and D, making it suitable for explosive gas environments.

Q: What is the weight of the assembly without fittings?

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

Q: Does the 21000-16-05-15-037-01-02 include the probe?

A: Yes, it includes a 3300 XL 8 mm probe with a connector and a 0.5 m cable.

Q: What is the probe penetration dimension?

A: The probe penetration (option D dimension) is 307 inches.

Product Support and Availability

The 21000-16-05-15-037-01-02 is available as new and original in factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Contact Petro Auto Tech for current stock levels and ordering details.