Bently Nevada 21000-16-05-15-093-03-02 Explosion-Proof Housing

Product Overview

The Bently Nevada 21000-16-05-15-093-03-02 is an industrial-grade proximity probe housing assembly engineered for high-performance vibration and position monitoring in hazardous locations. This assembly integrates a 3300 XL 8mm proximity probe into a protective aluminum body with a 304 stainless steel sleeve, ensuring critical machinery health data is transmitted reliably even in volatile environments. Weighing approximately 1.1 kg, this complete housing solution is fully compliant with API 670 standards and carries a 12-month factory warranty.

Technical Configuration

This 21000-series model is specifically configured for deep-reach penetration and comprehensive conduit connectivity:

• Full Model: 21000-16-05-15-093-03-02
• Probe Option (16): Includes the industry-standard 3300 XL 8 mm reverse-mount probe.
• Probe Cable Length (05): 0.5 meter (20 inches) integrated lead for local termination.
• Standoff Adapter (15): 1.5-inch (38 mm) adapter length for precise gapping.
• Probe Penetration (093): 9.3-inch (approx. 236 mm) depth for deep machine casings.
• Fittings (03): Includes 3/4-14 NPT plug, reducer (3/4 to 1/2), and a multi-size cable seal grip.
• Mounting Thread (02): Standard 3/4-14 NPT mounting thread.

Technical Specifications

Installation & Maintenance

When installing the 21000-16-05-15-093-03-02, ensure the 3/4-14 NPT mounting threads are properly lubricated and sealed to maintain the explosion-proof rating. This specific 9.3" penetration model provides a wide range of depth adjustment, but always verify gapping with a Proximitor sensor before finalizing the standoff position. For long-term reliability, ensure the dome cover is fully seated against the O-ring to prevent moisture ingress. Note that the probe serial and part numbers are typically displayed on a flag label when the internal cable visibility is limited by the housing configuration.

Engineering Advantages

The Bently Nevada 21000 series is the premier choice for Hazardous Zone machinery protection. By combining the precision of the 3300 XL eddy current probe with a CSA Type 4 rated housing, it protects the sensor from harsh chemical exposure and physical damage. This assembly is designed for "hot-swapping" or external mounting, allowing maintenance teams to adjust or replace probes without opening the machine casing. Its API 670 compliance ensures that it integrates seamlessly with modern rack-based monitoring systems like the Bently Nevada 3500 series.

Technical FAQs

Q1: What is the benefit of the 03 Fittings package?
A1: It provides a complete conduit interface solution, including a reducer and a cable seal grip that accommodates three different cable diameters (1/8", 1/4", and 5/16"), ensuring a gas-tight seal at the wiring entry point.

Q2: Can I use this housing for gas turbine monitoring?
A2: Yes, the 21000 series is frequently used on gas turbines and high-speed compressors due to its explosion-proof rating and ability to withstand extreme operating temperatures down to -50°C.

Q3: How do I handle the penetration depth if I need more reach?
A3: This model provides 9.3 inches of reach. If your application requires more than 12 inches (305mm), Bently Nevada recommends adding a sleeve support near the probe tip to prevent mechanical resonance and ensure signal stability.