The Bently Nevada 31000-16-05-00-068-03-02, also cataloged as the 31000 Proximity Probe Housing, operates as a dedicated hardware component for the mechanical protection and secure mounting of eddy-current transducers within rotating machinery monitoring systems.

Model Identification Matrix

The configuration of this housing assembly is defined by its specific physical dimensions and mounting features:

• 31000: Base series designation

• 16: Mounting thread specification

• 05: Housing configuration style

• 00: Material and finish selection

• 068: Overall length identifier

• 03: Connection type interface

• 02: Agency approval status

Physical and Mechanical Specifications

Rotor Dynamics and Probe Integration

The housing provides the structural interface necessary to maintain probe stability during machine operation. Precise mechanical alignment within the housing is required to ensure that the eddy-current probe maintains a consistent gap to the target shaft. Excessive housing vibration or improper tightening can induce noise in the transducer output, potentially leading to false rotor dynamics readings. Maintenance personnel must ensure that the probe tip is secured at the designated gap voltage, typically targeting -10 VDC during cold startup to account for thermal expansion of the machine casing.

Ordering Information

• 1 x 31000-16-05-00-068-03-02 Proximity Probe Housing

• 1 x Set of locking nuts for axial positioning

• 1 x O-ring seal kit for environmental protection

• 1 x Installation technical datasheet

Field Installation Guidelines

• Surface Preparation: Clean the mounting hole threads to remove debris or sealant residue before installation.

• Torque Application: Apply moderate torque to the locking nuts to prevent housing rotation during thermal cycling.

• Grounding: Ensure the housing makes secure metal-to-metal contact with the machine case if an external ground path is required.

• Sealing: Use appropriate thread sealant on the NPT sections to prevent oil leakage if the housing enters a pressurized lubrication area.

• Cable Routing: Keep proximity probe cables within protective conduit to minimize mechanical damage and electromagnetic interference.

Frequently Asked Questions

• Is this housing compatible with all 8 mm probes? It is designed for specific probe diameters; verify internal bore dimensions before insertion.

• Can this unit be reused after removal? Yes, provided the threads and sealing surfaces remain free of distortion or corrosion.

• What is the primary purpose of the O-ring? It provides a seal against the ingress of machine lubricants and environmental contaminants.

• Does this housing affect signal sensitivity? No, but improper mounting that allows the probe to oscillate will introduce erroneous vibration signals.

• Can it be used in high-pressure zones? Ensure the specific pressure rating of the NPT thread interface is compliant with the application requirements.

• Are there torque limits for mounting? Avoid overtightening to prevent cracking the housing or damaging the internal probe threads.

• What is the chemical compatibility? The stainless steel construction is compatible with standard turbine and compressor lubricating oils.

• How is the probe held in place? Axial positioning is maintained by the locking nuts provided with the assembly.