Configured for protected sensor mounting, the Bently Nevada 21000-16-05-15-093-03-02 (21000-16-05-15-093-03-02 Proximity Probe Housing Assembly) provides direct physical enclosure for 3300 XL 8 mm probes within machine monitoring systems.

Model Matrix & Suffix Breakdown

• 21000: Base Model (Proximity Probe Housing)
• 16: Probe type (3300 XL 8 mm)
• 05: 0.5 m (20 in) probe cable length
• 15: 1.5 in (38 mm) minimum case length
• 093: Fitting configuration (NPT plugs and cable seal)
• 03: 3/4-14 NPT reducer and plug set
• 02: 3/4-14 NPT process connection

Hardware Specifications

Mechanical Monitoring and Transducer Protection

The 21000 housing assembly is engineered to facilitate stable eddy-current probe scaling by providing a rigid mechanical interface to the machine casing. It ensures that the probe tip remains correctly positioned for gap voltage validation (targeted at -10 VDC). By shielding the probe and its cable connection, the assembly prevents mechanical damage and provides cross-talk suppression from external interference. The housing structure supports accurate rotor dynamics data acquisition by dampening structural vibration transmitted to the sensor, maintaining the required linearity for displacement measurements.

Ordering Info

• 1 x 21000-16-05-15-093-03-02 Housing Assembly
• 1 x 3/4-14 NPT plug and reducer set
• 1 x Cable seal grip with variable-size grommets (1/8 to 3/8 inches)

Field Installation Guidelines

• Process Connection: Install the housing using the 3/4-14 NPT fitting; ensure a minimum of 5 threads of engagement using compatible sealant to prevent fluid leakage.
• Cable Sealing: Select the appropriate grommet size (1/8 to 3/16, 1/4 to 5/16, or 5/16 to 3/8 inches) and tighten the cable seal grip to ensure a pressure-tight seal.
• Probe Alignment: Adjust the probe insertion depth within the housing until the target gap is achieved, then secure the probe lock nut.
• Grounding: Verify that the housing assembly maintains electrical continuity with the machine frame for effective electromagnetic shielding.

Frequently Asked Questions

• Why is a reducer used in this housing assembly?

  The reducer (3/4-14 to 1/2-14 NPT) allows for flexibility in connecting the housing to different conduit or process port sizes present on the machine casing.

• Can this housing be used in high-pressure environments?

  The NPT threaded connections are designed for pressure containment; verify that the machine casing pressure ratings do not exceed the assembly limits.

• What is the purpose of the cable seal grip?

  The cable seal grip prevents oil, moisture, and dust from entering the housing, protecting the probe connector from corrosion and environmental degradation.

• Is the housing assembly material compatible with harsh oils?

  The housing components are constructed from corrosion-resistant materials suitable for contact with industrial lubricants and hydraulic fluids.

• Why are different grommet sizes included?

  Different grommets ensure a tight seal around varying diameters of sensor extension cables, guaranteeing proper strain relief and environmental sealing.

• Does this housing require periodic maintenance?

  Inspect the NPT threads for signs of loosening or fluid leaks during scheduled maintenance shutdowns; ensure the cable seal remains tight.

• Can I replace the probe without removing the entire housing?

  The 21000 series allows for probe removal/replacement by loosening the internal locking mechanisms after gaining access to the rear of the housing.

• How does the housing impact eddy-current sensing?

  The metallic housing provides a stable mounting reference, but the probe tip must be clear of the housing walls to prevent parasitic induction.