Bently Nevada 21000-16-05-15-085-03-02 8.5in Probe

Product Overview

The BENTLY NEVADA 21000-16-05-15-085-03-02 is a professional-grade proximity probe housing assembly designed for the secure external mounting of 3300 XL 8mm proximity probes. This assembly is engineered to provide a robust, explosion-proof enclosure for machinery protection systems, fully compliant with the American Petroleum Institute (API) 670 standard. Built with a high-strength aluminum body and a 304 stainless steel sleeve, it ensures long-term durability in hazardous industrial environments. The unit arrives in original factory packing with a 12-month warranty, providing a reliable solution for critical vibration and position monitoring.

Technical Configuration

Advanced Mounting & Penetration

This 21000 series model is specifically configured with an 8.5-inch probe penetration depth (Option 085) and includes a 1.5-inch (38 mm) standoff adapter (Option 15). The total reach is optimized for large-scale industrial machinery, allowing for precise gapping of the internal reverse-mount probe. The assembly features a 3/4-14 NPT mounting thread (Option 02) and a comprehensive fittings kit (Option 03) that includes an NPT plug, an NPT reducer, and a multi-size cable seal grip with grommets to accommodate various cable diameters from 1/8 to 3/8 inches.

Hazardous Area Safety & Compliance

Designed for safety in volatile atmospheres, the 21000-16-05-15-085-03-02 is CSA certified as a Type 4 enclosure and rated explosion-proof for North American Class 1 Divisions 1 and 2 (Groups C and D). It maintains a T4 temperature rating in ambient conditions up to +80°C. Furthermore, the device is RoHS compliant and meets FCC Part 15 standards, ensuring it operates without causing harmful interference in sensitive electronic environments. The internal reverse-mount 3300 XL 8mm probe comes with a 0.5-meter (20 in) cable, tailored for compact integration within the housing body.

Technical Specifications

Installation & Maintenance

Proper installation is vital for signal accuracy. For penetration lengths (C+D) exceeding 12 inches (300 mm), it is mandatory to add sleeve support near the probe to prevent mechanical resonance. This specific 10-inch combined reach falls within the safe operating range without additional support, though careful alignment is required. The penetration depth (Option D) allows for a fine-tuning adjustment range of ± 0.5 inches (13 mm). Maintenance is simplified by the screw-in dome cover, which provides quick access to the probe's internal connections and O-ring seals.

Engineering Advantages

• API 670 Compliance: Guaranteed to meet industry standards for externally mounted proximity probe housings.
• Explosion-Proof Reliability: Engineered for hazardous locations in oil/gas and power generation facilities.
• Versatile Fittings: The included 03 fittings kit provides multiple grommet sizes, ensuring a tight cable seal regardless of the extension cable used.
• Corrosion Resistance: The use of 304 stainless steel for the probe sleeve ensures longevity when exposed to machine fluids and environmental moisture.

Technical FAQs

Q1: What is the purpose of the 1.5-inch standoff adapter?
A1: The standoff adapter provides additional clearance between the machine case and the housing body, often required for specific insulation or mechanical obstructions.

Q2: Is the probe label visible in this configuration?
A2: With the 0.5m cable option, the P/N and S/N flag labels are typically not visible within the housing sleeve once installed.

Q3: Can this housing be used for intrinsically safe applications?
A3: Yes, when used with appropriate hazardous area approved proximity probes and barriers, the aluminum housing is certified for intrinsically safe circuits.