Bently Nevada 21000-16-10-00-037-03-02

Bently Nevada 21000-16-10-00-037-03-02

Product Overview This compact assembly features a 3.7 inch penetration depth without standoff adapter, designed for machinery with thin casings or minimal internal depth requirements. The 1.0 meter cable provides standard routing length. This configuration is among the shortest penetration options available in the 21000 series, making it ideal for small pumps, compact motors, and other rotating equipment where the target surface is close to the external mounting point.

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Description

Bently Nevada 21000-16-10-00-037-03-02

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
  • Probe Penetration Depth: 3.7 inches (94 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

  • Very compact 3.7 inch penetration
  • Direct mounting without standoff adapter
  • 1.0 meter cable for standard routing
  • Pre-installed reverse mount probe
  • External access for gap adjustment
  • API 670 compliant
  • CSA explosion-proof rated

Application Scenarios

  • Small process pumps
  • Compact electric motors
  • Thin-wall industrial equipment
  • Small fans and blowers
  • Minimal-depth installations

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

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

  • Short 3.7 inch sleeve
  • No standoff adapter, direct mounting
  • 1.0 meter integral cable
  • Standard dome cover
  • 3/4-14 NPT mounting thread

Working Principle The short sleeve positions the reverse mount probe tip at minimal depth within the machine casing. The probe generates an eddy-current field that induces currents in the nearby shaft surface, with impedance changes converted to voltage signals proportional to gap distance. The housing provides mechanical support and environmental protection for this sensing element.

Installation Requirements

  • 3/4-14 NPT mounting hole
  • Verify 3.7 inches internal clearance
  • Route cable through conduit entry
  • Adjust probe to -10 Vdc
  • Ensure flat mounting surface

Usage Precautions

  • Very short penetration requires verification of internal obstructions
  • Counterbore machine case if penetration is between 1.0 and 2.0 inches to prevent side view interference
  • Ensure probe cable is not pinched during assembly
  • Verify O-ring seal integrity

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