Product Overview
Part of the Bently Nevada 21000 series, the 21000-16-05-00-066-03-02 is a rugged proximity probe housing assembly engineered for reliable vibration monitoring in demanding industrial environments. This model integrates a 3300 XL 8 mm probe with a 0.5 m cable, a 6.6-inch probe penetration, and a 3/4-14 NPT mounting thread—all in a lightweight aluminum body with a 304 stainless steel sleeve.
Designed for ease of installation and long service life, this housing assembly is CSA Type 4 certified and fully compliant with API 670 standards, making it a dependable choice for externally mounted proximity probes in hazardous areas.
Technical Specifications
| Parameter |
Value |
| Probe Option |
3300 XL 8 mm probe with connector |
| Probe Cable Length |
0.5 m (20 in) |
| Standoff Adapter |
None |
| Probe Penetration |
6.6 in |
| Fitting Option |
One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip with grommets for 1/8–3/16 in, 1/4–5/16 in, and 5/16–3/8 in cables |
| Mounting Thread |
3/4-14 NPT |
| Body Material |
Aluminum with 304 stainless steel sleeve |
| Maximum (C) + (D) Dimension |
13.5 in (34.3 mm) |
| Weight (typical, without fittings) |
1.1 kg (2.4 lb) |
Key Features & Benefits
-
Explosion-proof rating for hazardous area installations
-
CSA Type 4 enclosure ensures dust and water resistance
-
API 670 compliant for externally mounted proximity probe housings
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Complete assembly includes dome cover, threaded ports, probe sleeve, O-rings, reverse mount probe, thread seal, and optional fittings
-
Lightweight yet durable construction reduces mounting stress
Industry Applications
The 21000-16-05-00-066-03-02 is ideal for machinery protection in rotating equipment such as turbines, compressors, and pumps. Its rugged design and CSA approvals make it suitable for oil and gas, petrochemical, and power generation facilities where reliable vibration monitoring is critical.
In a typical installation, this housing assembly mounts externally on a machine casing, protecting the proximity probe from environmental hazards while maintaining accurate shaft vibration measurements. The 0.5 m cable length is well-suited for close-coupled installations where the probe connects to a nearby extension cable or monitor.
Installation & Setup Guidance
Before installation, verify that the mounting thread (3/4-14 NPT) matches your machine's existing port. The included cable seal grip accommodates cable diameters from 1/8 to 3/8 inches, ensuring a secure and weatherproof entry. Tighten the dome cover and fittings to the manufacturer's recommended torque to maintain the explosion-proof seal.
For optimal performance, position the probe so that the sensing tip is at the correct gap relative to the target surface. Use the visible probe markings (if present) to confirm proper penetration. If the probe is not visible, rely on the mechanical stop and measured dimensions to set the gap.
Maintenance & Reliability
Routine inspection of the housing assembly every 6 to 12 months is recommended to check for loose fittings, damaged O-rings, or signs of corrosion. The aluminum body and stainless steel sleeve resist most industrial atmospheres, but in highly corrosive environments, more frequent checks may be necessary.
Because the assembly is designed for easy access, replacing the probe or O-rings is straightforward, minimizing downtime. The robust construction and CSA Type 4 rating contribute to a long service life, reducing total cost of ownership.
Selection Guide & Purchasing Advice
When ordering a replacement, confirm the exact part number 21000-16-05-00-066-03-02 to ensure compatibility with your existing system. Verify the probe cable length and mounting thread requirements for your application. If you need assistance with configuration, PLC Source PRO offers expert support to help you select the correct module.