Product Overview
The Bently Nevada 21000-16-05-15-114-03-02 is a precision-engineered proximity probe housing assembly designed for reliable vibration monitoring in rotating machinery. This model combines a rugged aluminum body with a 304 stainless steel sleeve, ensuring durability in demanding industrial environments. Configured with a 3300 XL 8 mm probe and a 0.5 m (20 in) cable, it provides accurate measurement of shaft vibration and position, critical for predictive maintenance and machine protection.
This housing assembly meets stringent safety standards, including CSA Type 4 enclosure certification and compliance with the American Petroleum Institute's (API) 670 Standard. It is rated explosion-proof for hazardous areas, making it suitable for use in oil & gas, petrochemical, and power generation facilities.
Key Specifications
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Probe Option: 3300 XL 8 mm probe with connector
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Cable Length: 0.5 m (20 in)
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Standoff Adapter: 1.5 in (38 mm)
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Probe Penetration (D): 11.4 in
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Mounting Thread: 3/4-14 NPT
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Fittings: 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 1/8–3/16 in, 1/4–5/16 in, 5/16–3/8 in
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Material: Aluminum body with 304 stainless steel sleeve
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Maximum (C)+(D) Dimension: 13.5 in (34.3 cm) with 0.5 m cable (probe P/N and S/N not visible)
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Weight: 1.1 kg (2.4 lb) typical, without fittings
Technical Specifications
| Parameter |
Value |
| Probe Type |
3300 XL 8 mm probe with connector |
| Cable Length |
0.5 m (20 in) |
| Standoff Adapter |
1.5 in (38 mm) |
| Probe Penetration (D) |
11.4 in |
| Mounting Thread |
3/4-14 NPT |
| Fittings Included |
3/4-14 NPT plug, 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, 5/16–3/8 in cables) |
| Housing Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C)+(D) Dimension |
13.5 in (34.3 cm) |
| Weight (typical, without fittings) |
1.1 kg (2.4 lb) |
Applications
This Bently Nevada 21000-16-05-15-114-03-02 housing assembly is ideal for monitoring shaft vibration and axial position in turbines, compressors, pumps, and electric motors. Its explosion-proof rating allows installation in 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 housing is also certified for Class III locations and meets CSA Type 4 enclosure requirements, ensuring protection against water and dust ingress.
With a maximum probe penetration length of 11.4 inches, this assembly suits machines with deep bearing housings. The 0.5 m cable length is suitable for installations where the probe connects to a junction box or extension cable nearby.
Installation & Setup
When installing the 21000-16-05-15-114-03-02, ensure the mounting thread (3/4-14 NPT) is properly sealed to prevent leakage. The probe penetration (option D) is adjustable within a range of ±0.5 inches. For penetration lengths between 1.0 and 2.0 inches, counter boring the machine case may be necessary to reduce side or rear view effects. If the combined probe penetration (C+D) exceeds 12 inches, add sleeve support near the probe to prevent resonance. The cable seal grip accommodates various cable diameters; select the appropriate grommet for your cable size.
Maintenance & Reliability
Regular inspection of the housing assembly is recommended to ensure the O-rings and thread seal remain intact, preventing moisture or contaminants from entering. Check the cable and connector for wear or damage. The aluminum body with stainless steel sleeve offers excellent corrosion resistance, but in harsh environments, periodic cleaning is advised. Proper installation and maintenance extend the service life and ensure accurate vibration measurements, reducing unplanned downtime.
Selection Guide
Before purchasing, verify that the mounting thread and probe penetration length match your machine's requirements. The 21000-16-05-15-114-03-02 includes specific fittings; if your installation needs different cable sizes, confirm compatibility. PLC Source PRO supplies this genuine Bently Nevada product with a 12-month factory warranty, ensuring original quality and reliability.