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Configured for mechanical protection and transducer support in machine monitoring systems, the Bently Nevada 21000-16-10-00-124-03-02 (21000 Proximity Probe Housing Assembly) provides direct physical execution for housing 3300 XL 8 mm probes within industrial monitoring networks.

Suffix Breakdown & Model Matrix

Suffix Description
21000 Base Model: Proximity Probe Housing Assembly
16 Probe Option: 3300 XL 8 mm probe
10 Probe Cable Length: 1.0 m (39 in)
00 Standoff Adapter: No standoff adapter
124 Probe Penetration: 12.4 in
03 Fittings: 3/4-14 NPT plug, 3/4-14 to 1/2-14 NPT reducer, cable seal grip
02 Mounting Thread: 3/4-14 NPT

Hardware Specifications

Parameter Specification
Model 21000-16-10-00-124-03-02
Brand Bently Nevada
Origin USA
Weight 2 kg (shipping weight)
Operating Temp -40 deg C to +177 deg C
Power Consumption N/A (Passive mechanical component)
Material Aluminum body, 304 stainless steel sleeve
Mounting Thread 3/4-14 NPT

Rotor Dynamics and Gap Voltage Validation

The 21000 assembly ensures the mechanical rigidity necessary for high-accuracy rotor dynamics monitoring. Maintaining the probe tip at the specified distance from the shaft is required to stay within the linear operating range of the eddy-current sensor. During the mechanical commissioning phase, gap voltage validation must be performed to confirm that the transducer output targets -10 VDC at the monitor input. Ensuring this target prevents signal clipping or non-linear behavior that occurs when the probe is too close to or too far from the target surface. Proper mounting prevents measurement artifacts caused by housing resonance or mechanical loosening under high-vibration conditions.

Frequently Asked Questions

Q: How should the cable seal grip be configured for different probe cable diameters?

A: The cable seal grip includes multiple interchangeable grommets. Select the specific grommet corresponding to your probe cable diameter (1/8 to 3/16 in, 1/4 to 5/16 in, or 5/16 to 3/8 in) to ensure an environmental seal and proper strain relief.

Q: Is the absence of a standoff adapter (suffix 00) suitable for all machine cases?

A: The omission of the standoff adapter requires the probe sleeve to be mounted directly to the machine case port. Ensure that the machine case design allows for sufficient internal clearance for the probe sleeve and cable termination without mechanical interference.

Field Installation Guidelines

  1. Ensure the 3/4-14 NPT mounting threads are clean and lubricated with a thread sealant to prevent galling and ensure a pressure-tight seal against the machine case.
  2. Route the 1.0 m probe cable through conduits without exceeding the minimum bend radius, which prevents internal conductor fatigue and damage to the shielding.
  3. Tighten all conduit and cable seal fittings to prevent the ingress of industrial contaminants, which can affect the integrity of the signal path.
  4. Verify the probe penetration depth is exactly 12.4 in and lock the sleeve position securely to prevent vibration-induced movement during machine operation.

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