Description
Bently Nevada 21000-16-10-00-089-03-02
Technical Specifications
- Base Model: 21000 aluminum proximity probe housing assembly
- Probe Type: 3300 XL 8 mm reverse mount proximity probe
- Probe Cable Length: 1.0 meter (39 inches)
- Standoff Adapter: None (00 option)
- Probe Penetration Depth: 8.9 inches (226 mm)
- Fittings Configuration: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, one cable seal grip with grommets
- Mounting Thread: 3/4-14 NPT
- Housing Material: Aluminum body with 304 stainless steel sleeve
- Weight: 1.1 kg (2.4 lb) typical without fittings
- Operating Temperature: -51°C to +177°C (-60°F to +351°F)
- Enclosure Rating: CSA Type 4
- Hazardous Area Approval: CSA certified explosion-proof
Functional Features
- Direct mounting without standoff adapter for compact installations
- 8.9 inch penetration for moderate-depth machine casings
- 1.0 meter cable for flexible routing
- Reverse mount probe pre-installed
- External access for maintenance
- API 670 compliant design
- CSA explosion-proof certification
Application Scenarios
- Compact turbine bearing housings
- Medium-thickness compressor casings
- Pump volutes with limited external clearance
- Gearboxes with shallow to moderate probe depth requirements
- Installations where minimal external projection is desired
Performance Parameters
- Maximum C plus D dimension with visible label: 17.0 inches for 1.0 meter cable
- Probe linear range: 2.0 mm (80 mils)
- Scale factor: 7.87 V/mm (200 mV/mil)
- Target gap voltage: -10 Vdc
- Frequency response: 0 to 10 kHz
Material Composition
- Housing body: Cast aluminum alloy
- Probe sleeve: AISI 304 stainless steel
- Dome cover: Aluminum
- O-rings: Fluorocarbon elastomer
- Probe case: AISI 304 stainless steel
Structural Characteristics
- No standoff adapter, housing mounts flush to machine surface
- 8.9 inch probe sleeve
- 1.0 meter integral cable
- Standard dome cover with threaded retention
- 3/4-14 NPT mounting thread
Working Principle Without the standoff adapter, the housing body mounts directly to the machine casing, and the probe sleeve penetrates to the full 8.9 inch depth. This configuration eliminates the mechanical offset provided by the standoff, positioning the probe tip closer to the mounting surface relative to the target. The eddy-current probe operates identically, sensing gap changes through electromagnetic field interaction with the conductive shaft.
Installation Requirements
- Mounting surface must be flat and perpendicular to shaft centerline
- 3/4-14 NPT threads must be full depth to accept housing
- Verify 8.9 inch internal clearance
- Route 1.0 meter cable through conduit entry
- Adjust probe gap to -10 Vdc
Usage Precautions
- No standoff means housing sits closer to machine surface; verify clearance for dome cover removal
- Ensure mounting surface is clean and flat for proper sealing
- Sleeve length under 12 inches does not require additional support
- Verify thread engagement depth before installation
