Bently Nevada 21000-16-10-00-052-03-02

Bently Nevada 21000-16-10-00-052-03-02

Product Overview This compact configuration features a 5.2 inch penetration depth without a standoff adapter, designed for installations with relatively thin machine casings or where the target shaft is close to the external mounting surface. The 1.0 meter probe cable provides ample routing length for connecting to the monitoring system. This assembly is ideal for smaller turbomachinery, pumps, and motors where excessive penetration depth is unnecessary and space constraints favor a more compact installation.

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Description

Bently Nevada 21000-16-10-00-052-03-02

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: 5.2 inches (132 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

  • Compact 5.2 inch penetration for shallow mounting
  • No standoff adapter for minimal external projection
  • 1.0 meter cable for routing flexibility
  • Pre-installed reverse mount probe
  • External maintenance access
  • API 670 compliant
  • CSA explosion-proof rated

Application Scenarios

  • Small to medium steam turbines
  • Process pumps with thin casings
  • Industrial motors bearing monitoring
  • Compact compressors
  • Fans and blowers with shallow housing depths

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
  • Dome cover: Aluminum
  • O-rings: Fluorocarbon elastomer
  • Probe case: AISI 304 stainless steel

Structural Characteristics

  • Short 5.2 inch sleeve for compact installations
  • 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 probe tip at a shallow depth within the machine casing. The reverse mount probe faces the shaft from the interior of the housing, with the 5.2 inch sleeve providing the necessary reach for thin-wall applications. The probe generates an eddy-current field that interacts with the shaft surface, producing a voltage signal proportional to the gap distance.

Installation Requirements

  • Mount in 3/4-14 NPT threaded hole
  • Verify 5.2 inch internal clearance
  • Route 1.0 meter cable through conduit
  • Adjust gap to -10 Vdc
  • Ensure mounting surface is flat

Usage Precautions

  • Short penetration means less internal clearance required
  • Verify no internal obstructions within 5.2 inches of mounting surface
  • Counterbore machine case if penetration is between 1.0 and 2.0 inches to reduce side view effects
  • Standard sleeve support not required for this length

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