Product Overview
When rotating machinery in critical service begins to show abnormal vibration, the Bently Nevada 21000-16-05-00-055-03-02 proximity probe housing assembly provides the reliable mounting solution you need for accurate, repeatable measurements. This industrial automation module is engineered to protect and position a 3300 XL 8 mm probe, ensuring consistent proximity sensing in demanding environments.
The 21000-16-05-00-055-03-02 is a new, factory-packed unit with a 12-month warranty. Its aluminum body with a 304 stainless steel sleeve offers corrosion resistance and structural integrity, making it a trusted choice for permanent installation on compressors, pumps, turbines, and other rotating equipment.
Technical Specifications
This housing assembly is configured with a specific set of options that determine its fit and function. The following table details the exact specifications for the 21000-16-05-00-055-03-02:
| Specification |
Value |
| Probe Option |
16 = 3300 XL 8 mm probe |
| Probe Cable Length |
05 = 0.5 m (20 in) |
| Standoff Adapter |
00 = No standoff adapter |
| Probe Penetration |
-055 = 5.5 in |
| Fitting Option |
03 = One 3/4-14 NPT plug; one 3/4-14 to 1/2-14 NPT reducer; one cable seal grip with grommets for cable sizes 1/8 to 3/16 in, 1/4 to 5/16 in, 5/16 to 3/8 in |
| Mounting Thread |
-02 = 3/4-14 NPT |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) Dimension |
13.5 in (34.3 mm) |
| Weight |
1.1 kg (2.4 lb) typical, without fittings |
The 0.5 m probe cable provides a short lead for close-coupled installations, while the 5.5-inch probe penetration ensures proper insertion depth for accurate gap measurement. The 3/4-14 NPT mounting thread is mandatory when no standoff adapter is used, as it secures the housing directly to the machine case.
Industry Applications
The 21000-16-05-00-055-03-02 is designed for externally mounted proximity probes in critical rotating machinery. Typical applications include:
-
Turbo-machinery monitoring: Compressors and steam turbines where continuous vibration and axial position monitoring are essential for safe operation.
-
Pumps and motors: Large industrial pumps and electric motors that require reliable shaft vibration measurement to detect early bearing wear or misalignment.
-
Generators and gearboxes: Power generation equipment where unplanned downtime is extremely costly; the robust housing protects the probe from environmental contaminants.
Because the 21000-16-05-00-055-03-02 is certified as a CSA Type 4 enclosure and compliant with API 670, it is suitable for hazardous areas when paired with intrinsically safe proximity probes. This makes it a preferred choice in oil and gas, chemical, and power generation facilities.
Installation & Setup
Proper installation is critical for accurate vibration readings. Follow these guidelines when mounting the 21000-16-05-00-055-03-02:
- Verify that the machine case has a 3/4-14 NPT threaded port. If a standoff adapter is required, select the appropriate length; for this model, no standoff adapter is used.
- Insert the housing into the port and tighten securely, ensuring the probe face is positioned at the correct gap per the manufacturer's recommendation.
- Route the probe cable through the cable seal grip, selecting the correct grommet for your cable diameter (1/8 to 3/16 in, 1/4 to 5/16 in, or 5/16 to 3/8 in).
- Connect the probe cable to the extension cable or monitor. Ensure the connector is clean and tightly engaged.
- Do not overtighten the dome cover; hand-tighten plus a quarter turn is usually sufficient.
For hazardous area installations, follow all local electrical codes and use approved conduit seals as required.
Maintenance & Reliability
Routine inspection of the 21000-16-05-00-055-03-02 is minimal but important. Periodically check for:
- Loose fittings or dome cover that could allow moisture ingress.
- Damage to the cable or connector.
- Accumulation of dirt or debris around the probe tip.
The aluminum body and stainless steel sleeve resist corrosion, extending service life in harsh industrial environments. With proper care, this housing assembly provides years of reliable service, reducing the total cost of ownership compared to frequent replacements.
Selection Guide
When ordering a replacement or spare, verify that the suffix codes match your requirements. The 21000-16-05-00-055-03-02 is configured for a 3300 XL 8 mm probe with a 0.5 m cable and no standoff adapter. If your application requires a different probe length or cable length, consult the Bently Nevada ordering guide.
For genuine, factory-new parts, PLC Source PRO offers the 21000-16-05-00-055-03-02 with a 12-month warranty. Ensure your system stays online with authentic components from a trusted supplier.