Product Overview
When machinery vibration threatens uptime, the Bently Nevada 21000-16-10-00-077-03-02 delivers precise, reliable monitoring. This Proximity Probe Housing Assembly is engineered for externally mounted proximity probes in critical rotating equipment. It provides a robust, explosion-proof enclosure that protects the probe and ensures accurate displacement measurements.
Part of the trusted 21000 series, the 21000-16-10-00-077-03-02 combines an aluminum body with a 304 stainless steel sleeve, offering durability and corrosion resistance. It is certified as CSA Type 4 and fully compliant with API 670, making it a preferred choice for refineries, power plants, and heavy industry.
Technical Specifications
Every parameter of the 21000-16-10-00-077-03-02 is engineered for performance. Here are the key specifications from the manufacturer:
| Attribute |
Value |
| Probe Option |
3300 XL 8 mm probe with connector |
| Probe Cable Length |
1.0 m (39 in) |
| Probe Penetration (Option D) |
7.7 in |
| Mounting Thread |
3/4-14 NPT |
| Material |
Aluminum body with 304 stainless steel sleeve |
| Maximum (C) + (D) with visible probe |
17.0 in (43.18 cm) |
| Maximum (C) + (D) dimension |
32.9 in (83.5 cm) |
| Weight (typical, without fittings) |
1.1 kg (2.4 lb) |
| Fittings Included |
One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, cable seal grip with grommets |
| Hazardous Area Approvals |
CSA: Class 1 Div 1&2 Groups C,D; Class 2 Div 1&2 Groups E,F,G; Class III; Enclosure Type 4; T5 @ Ta=-50°C to +40°C; T4 @ Ta=-50°C to +80°C |
| Compliance |
FCC Part 15, RoHS Directive 2011/65/EU |
These specifications ensure that the 21000-16-10-00-077-03-02 meets the demands of severe industrial environments. The 3/4-14 NPT mounting thread provides a secure, standardized installation.
Applications and Use Cases
The 21000-16-10-00-077-03-02 is ideal for monitoring shaft vibration and axial position in turbines, compressors, pumps, and motors. Its explosion-proof design makes it suitable for hazardous areas where flammable gases or dusts are present.
-
Refineries: Monitor critical rotating equipment in areas classified as Class 1, Division 1.
-
Power Generation: Ensure reliable turbine operation with continuous vibration monitoring.
-
Chemical Processing: Maintain uptime in aggressive environments with corrosion-resistant construction.
By using the 21000-16-10-00-077-03-02, you reduce the risk of catastrophic failure and extend machinery life.
Installation and Setup
Proper installation is essential for accurate readings. Follow these guidelines:
- Mount the housing using the 3/4-14 NPT thread. Ensure the mounting surface is clean and flat.
- For probe penetration lengths between 1.0 and 2.0 inches, counter bore the machine case to reduce side/rear view effects.
- If the combined (C) + (D) length exceeds 300 mm (12 in), add sleeve support near the probe to prevent resonance.
- The adjustment range for probe penetration option D is 13 mm (±0.5 in). Verify the correct gap before final tightening.
When using the included fittings, select the appropriate grommet for your cable diameter to maintain a proper seal.
Maintenance and Reliability
Regular inspection of the housing and probe is recommended to ensure long-term reliability. Check for:
- Loose fittings or conduit connections
- Damage to the probe cable or sleeve
- Accumulation of dirt or debris around the mounting area
The robust aluminum and stainless steel construction resists corrosion, reducing maintenance frequency. Periodic verification of the probe gap and output signal helps detect early wear.
Selection Guide
When ordering a replacement or new installation, verify the following:
- Probe option: 3300 XL 8 mm probe with connector
- Cable length: 1.0 m (39 in)
- Probe penetration: 7.7 in
- Mounting thread: 3/4-14 NPT
Ensure your system is compatible with the 8 mm probe format. For assistance, PLC Source PRO offers genuine Bently Nevada parts and expert guidance.