Bently Nevada 21000-16-10-15-034-03-02

Bently Nevada 21000-16-10-15-034-03-02

Product Overview This assembly combines a short 3.4 inch probe penetration with a 1.5 inch standoff adapter, creating a compact yet offset mounting configuration. The standoff adapter positions the housing body 1.5 inches away from the machine surface, while the 3.4 inch sleeve penetrates to the target shaft. This combination is useful when the mounting surface has external obstructions or when thermal isolation between the housing and machine casing is desired. The 1.0 meter cable provides standard routing length.

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Description

Bently Nevada 21000-16-10-15-034-03-02

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 Length: 1.5 inches (38 mm)
  • Probe Penetration Depth: 3.4 inches (86 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

  • Short 3.4 inch penetration with 1.5 inch standoff offset
  • 1.0 meter cable for standard routing
  • Reverse mount probe pre-installed
  • External gap adjustment capability
  • Multi-size cable seal grip
  • API 670 compliant
  • CSA explosion-proof rated

Application Scenarios

  • Machinery with external surface obstructions
  • Applications requiring thermal isolation from casing
  • Small to medium pumps and compressors
  • Motor bearing housings with offset mounting bosses
  • Installations where standoff provides clearance for conduit routing

Performance Parameters

  • 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
  • Maximum C plus D dimension: 29.2 inches for 1.0 meter cable

Material Composition

  • Housing body: Cast aluminum alloy
  • Probe sleeve: AISI 304 stainless steel
  • Standoff adapter: Aluminum or steel
  • Dome cover: Aluminum
  • O-rings: Fluorocarbon elastomer
  • Probe case: AISI 304 stainless steel

Structural Characteristics

  • 1.5 inch standoff adapter between housing and machine surface
  • 3.4 inch probe sleeve
  • 1.0 meter integral cable
  • Standard dome cover
  • 3/4-14 NPT mounting thread

Working Principle The standoff adapter creates a mechanical offset between the machine casing and the housing body. The 3.4 inch sleeve extends from the housing through the standoff to position the probe tip near the shaft. This configuration is particularly useful when the external machine surface has ribs, fittings, or other features that would interfere with direct mounting. The eddy-current sensing operates identically to other configurations.

Installation Requirements

  • Mount standoff adapter to machine surface
  • Thread housing into standoff with 3/4-14 NPT
  • Verify 3.4 inches internal clearance beyond standoff
  • Route cable through conduit
  • Adjust gap to -10 Vdc

Usage Precautions

  • Short penetration may require counterboring to prevent side view effects
  • Verify standoff adapter is properly seated against machine surface
  • Ensure total external height (standoff plus housing) does not interfere with adjacent equipment
  • Check O-ring seals at both standoff and dome cover

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