21000-16-10-15-114-03-02 | Bently Nevada 1.0m Cable Proximity Probe Housing

Introduction: The Evolution of Machine Protection

When industrial machinery began demanding continuous, real-time vibration monitoring, engineers needed robust housings that could protect sensitive proximity probes in harsh environments. The 21000-16-10-15-114-03-02 from Bently Nevada represents a key evolution in this field. Designed for externally mounted proximity probes, this aluminum housing with a 304 stainless steel sleeve provides a secure, explosion-proof enclosure for critical rotating equipment. Its modular design allows for flexible probe penetration and cable routing, making it a versatile choice for refineries, power plants, and other heavy industries.

What Is the 21000-16-10-15-114-03-02?

The 21000-16-10-15-114-03-02 is a proximity probe housing assembly from Bently Nevada's 21000 series. It includes a dome cover, threaded conduit ports, a probe sleeve, O-rings, a reverse mount proximity probe, a thread seal, and optional conduit fittings. The assembly supports a 3300 XL 8 mm probe with a 1.0 meter (39 inch) cable. It uses a 3/4-14 NPT mounting thread and comes with one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for various cable sizes. The standoff adapter length is 1.5 inches (38 mm), and the probe penetration (D dimension) is 11.4 inches. The maximum combined cable length (C + D) with visible probe identification is 17.0 inches (43.18 cm), and the maximum overall dimension is 32.9 inches (83.5 cm). The assembly weighs approximately 1.1 kg (2.4 lb) without fittings.

Key Features and Technical Specifications

• Probe Option: 3300 XL 8 mm probe with connector.
• Probe Cable Length: 1.0 m (39 in).
• Standoff Adapter: 1.5 in (38 mm).
• Probe Penetration (D): 11.4 in.
• Mounting Thread: 3/4-14 NPT.
• Fittings: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.
• Maximum (C + D) with visible probe: 17.0 in (43.18 cm).
• Maximum (C + D) dimension: 32.9 in (83.5 cm).

A distinctive feature is the 11.4-inch probe penetration, which allows deep insertion into machine casings for accurate vibration measurement. This reduces side-view effects and improves signal reliability.

Industry Applications and Use Cases

In petrochemical plants, the 21000-16-10-15-114-03-02 is commonly used to monitor compressor and pump vibrations. Its CSA Type 4 enclosure and explosion-proof rating make it suitable for hazardous areas classified as Class 1 Divisions 1 and 2 Groups C and D, and Class 2 Divisions 1 and 2 Groups E, F, and G. The assembly also meets API 670 standards for externally mounted proximity probe housings. For example, in a refinery, this housing protects the probe from moisture and debris while providing accurate shaft displacement readings.

Installation and Setup Guidance

When installing the 21000-16-10-15-114-03-02, ensure the mounting surface is clean and flat. Use the 3/4-14 NPT thread for secure attachment. For probe penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may be necessary to reduce side-view effects. If the combined probe penetration (C + D) exceeds 300 mm (12 in), add sleeve support near the probe to prevent resonance. The adjustment range for the D dimension is 13 mm (±0.5 in). Always follow the manufacturer's manual for wiring and configuration.

Maintenance and Reliability Tips

Regular inspection of the 21000-16-10-15-114-03-02 helps ensure long-term reliability. Check the O-rings and thread seal for signs of wear or corrosion. Verify that the conduit fittings remain tight to maintain the explosion-proof seal. The aluminum body and stainless steel sleeve resist corrosion in most industrial environments. For hazardous area installations, follow the safety manual for periodic verification. This proactive approach reduces unplanned downtime and extends service life.

Compatibility and Integration

The 21000-16-10-15-114-03-02 is designed for use with Bently Nevada 3300 XL 8 mm proximity probes. It integrates with Bently Nevada monitoring systems and other compatible vibration monitoring equipment. The assembly is available with CSA approvals for hazardous areas and is fully compliant with API 670. For intrinsically safe applications, use approved proximity probes with the housing. The non-incendive circuit connection per drawing 140979 ensures safe operation in classified areas.

Frequently Asked Questions

Q: What is the maximum cable length for the 21000-16-10-15-114-03-02?

A: The probe cable length is 1.0 m (39 in). The maximum combined (C + D) dimension is 32.9 in (83.5 cm).

Q: Is the 21000-16-10-15-114-03-02 suitable for hazardous areas?

A: Yes, it is CSA certified for explosion-proof applications in Class 1 Divisions 1 and 2 Groups C and D, and Class 2 Divisions 1 and 2 Groups E, F, and G.

Q: What mounting thread does the 21000-16-10-15-114-03-02 use?

A: It uses a 3/4-14 NPT mounting thread. This is the default option when the standoff adapter length is not 00.

Q: What is the weight of the 21000-16-10-15-114-03-02?

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

Q: Can I use a different probe with the 21000-16-10-15-114-03-02?

A: The assembly is designed for the 3300 XL 8 mm probe. For other probes, refer to Bently Nevada documentation or contact Petro Auto Tech.

Product Support and Availability

The 21000-16-10-15-114-03-02 is available as new and original in factory packing from Petro Auto Tech. It comes with a 12-month factory warranty. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.