31000-16-05-35-026-03-02 Bently Nevada Proximity Probe Housing

Bently Nevada 31000-16-05-35-026-03-02 | 31000 Proximity Probe Housing

The 31000-16-05-35-026-03-02 is a Bently Nevada 31000 proximity probe housing assembly designed to protect a compatible 3300 XL 8 mm probe in industrial machinery monitoring installations. Its housing, stainless steel sleeve, cable sealing components, and threaded fittings support probe installation where environmental protection and controlled cable entry are important.

This configuration specifies a 0.5 m (20 in) probe cable, a 3.5 in standoff adapter, 2.6 in probe penetration, and a 3/4-14 NPT mounting thread. The assembly uses a glass-reinforced PPS thermoplastic housing with conductive fibers and stainless steel external hardware.

For maintenance and instrumentation engineers, the key selection factors are probe compatibility, required penetration, available mounting clearance, cable diameter, conduit or fitting arrangement, and the environmental conditions around the machine. The housing provides environmental protection; it is not a pressure vessel.

Configuration Breakdown | Read the Part Number as a Build Specification

• 31000 — 31000 series proximity probe housing assembly
  • -16 — Probe option with connector: 3300 XL 8 mm probe
  • -05 — Probe cable length: 0.5 m (20 in)
  • -35 — Standoff adapter length: 3.5 in
  • -026 — Probe penetration: 2.6 in
  • -03 — Fittings configuration:
    • Two plugs
    • One 3/4-14 NPT fitting
    • One 3/4-14 to 1/2-14 NPT stainless steel reducer
    • One cable seal grip with grommets for cable diameters of 1/8–3/16 in, 1/4–5/16 in, and 5/16–3/8 in
  • -02 — Mounting thread: 3/4-14 NPT, required for the specified standoff adapter option

Ordering checkpoint: Confirm every suffix against the installed assembly and mounting drawing. In particular, do not confuse the 0.5 m probe cable length with the 2.6 in probe penetration or the 3.5 in standoff adapter length. These dimensions describe different parts of the installation.

Technical Specifications

Mechanical Design and Environmental Protection

The housing combines a glass-reinforced PPS body with stainless steel sleeve components to support industrial probe mounting. Conductive fibers in the thermoplastic are part of the stated housing construction and relate to the material's electrostatic-dissipation requirements in applicable hazardous-area installations.

• Environmental sealing: The housing is certified for Type 4X protection and has an IP66 rating according to the supplied documentation. These ratings address environmental ingress protection, not resistance to internal or external process pressure.
• Mechanical support: The sleeve, retaining chain, and external hardware provide the mechanical mounting arrangement. Verify mounting support and clearance against the installation drawing.
• Cable entry: The supplied seal grip and grommets cover specified cable diameter ranges. Select the grommet that matches the actual cable outside diameter to avoid a poor seal or cable movement.
• Seal materials: The sleeve-to-housing seal uses Neoprene, while the probe case seal uses Viton. Confirm material suitability if the installation exposes the assembly to unusual chemicals or cleaning agents.

Pressure limitation: The assembly is designed to seal differential pressure between the probe tip and housing body when used with a compatible 3300 XL 8 mm probe. However, the plastic housing is not designed to resist internal or external pressure. The probes are not pressure-tested before shipment. If an application requires pressure-seal verification, obtain the manufacturer's approved test procedure before installation.

Suitable Equipment and Industrial Applications

• Steam and gas turbines: Houses a compatible proximity probe used for shaft displacement measurement when the machine's probe mounting arrangement supports this housing configuration.
• Centrifugal compressors: Supports probe installation for shaft vibration and position monitoring in compatible machinery protection systems.
• Industrial pumps: Provides an environmentally protected mounting arrangement for non-contact shaft measurement where the probe location and dimensions match the design.
• Motors and rotating machinery: Can be used where the equipment design requires a compatible 3300 XL 8 mm probe and a protected housing assembly.
• Outdoor or washdown-prone installations: The stated Type 4X and IP66 protection ratings may be relevant, provided the complete installation meets the site's environmental and hazardous-area requirements.

Application suitability depends on the machine design, mounting geometry, probe target, operating temperature, and installation certification. Do not infer suitability for a pressurized process boundary from the environmental protection ratings.

Installation and Commissioning Notes

1. Check the mounting location: Verify the 3/4-14 NPT thread, 3.5 in standoff adapter, and available clearance before fitting the assembly.
2. Confirm penetration: Compare the 2.6 in penetration option with the machine drawing and the required probe-to-target geometry. Do not use the penetration dimension as a substitute for the probe gap setting.
3. Fit the correct cable grommet: Measure the cable's actual outside diameter and select the matching supplied grommet range. Ensure the cable seal grip is correctly assembled.
4. Apply the specified torque: The supplied retaining-nut torque is 29.4 N·m (260 in·lb). Apply it only to the specified retaining nut and follow the applicable installation instructions; do not apply it indiscriminately to every threaded fitting.
5. Inspect the seals: Check the O-rings and mating surfaces for damage, contamination, or incorrect seating before closing the housing.
6. Verify system operation: After installation, check the probe gap and signal using the approved procedure for the connected Proximitor sensor and machinery monitor.

Follow the equipment manufacturer's procedures and site lockout requirements before working near rotating machinery. For hazardous-area service, confirm the complete installation method and applicable certification documents.

Field Diagnostics | Separate Housing Faults from Measurement Faults

Diagnostic principle: This assembly protects and positions the proximity probe. It does not independently measure vibration or diagnose machine condition. For signal faults, troubleshoot the probe, cable, Proximitor sensor, monitor channel, target surface, and installation geometry as one measurement chain.

Configuration Comparison: 31000-16-05-35-026-03-02 vs. 31000-28-05-15-042-06-02

Use the linked alternative below to compare the two housing configurations. The detailed suffix definitions supplied here apply to 31000-16-05-35-026-03-02; verify the alternative's complete configuration against its official drawing before assuming the suffixes have identical meanings.

Technical Recommendation for Choosing Between the Two

• Choose 31000-16-05-35-026-03-02 when the installation drawing requires a 3300 XL 8 mm probe, a 0.5 m cable, a 3.5 in standoff adapter, 2.6 in penetration, and the specified -03 fittings arrangement.
• Evaluate 31000-28-05-15-042-06-02 when its verified probe option, standoff length, penetration, fittings, or mounting arrangement better matches the existing machine installation.
• Before substituting either model, compare the mounting drawing, actual probe and cable arrangement, port threads, grommet sizes, temperature rating, seal materials, and required environmental or hazardous-area approvals.

The part-number differences indicate that the configurations should not be treated as interchangeable without documentation. If the original assembly is being replaced, use the installed part number and equipment drawing to verify each mechanical interface before ordering.

Global PLC Spare HUB's Insight

Housing replacement errors often arise when a technician checks the probe family but overlooks penetration depth, standoff length, or cable entry details. These dimensions determine whether the probe reaches its intended measurement position and whether the housing can be sealed correctly.

For this configuration, confirm the 2.6 in penetration and 3.5 in standoff adapter against the machine drawing first. Next, check the cable outside diameter against the supplied grommet ranges, inspect the Neoprene seal, and verify the specified retaining-nut torque. After installation, validate the measurement signal through the connected probe, Proximitor sensor, and monitor channel.

Also distinguish environmental sealing from pressure containment. Type 4X and IP66 ratings do not make this housing suitable for resisting internal or external pressure. Applications that require pressure-seal verification need an approved test and documented acceptance criteria.

Package Contents and Order Support

• 1 × Bently Nevada 31000-16-05-35-026-03-02 housing assembly, subject to order confirmation.
• Fittings and cable-sealing components according to the specified -03 configuration.
• Any additional probe, sensor, cable, or mounting hardware must be confirmed in the quotation unless explicitly included.

Warranty: 12-month warranty, subject to the supplier's written terms and conditions. Confirm the applicable coverage with the sales team before ordering.

Shipping options: FedEx, UPS, and DHL are available subject to destination, carrier service, and order processing. Confirm shipping arrangements and dispatch timing with the supplier for urgent maintenance requirements.

Request a quote: Provide the full part number, quantity, destination, probe model, and mounting drawing where available. For a substitute housing, include the installed configuration and dimensions so the team can help review mechanical and system compatibility.

Frequently Asked Questions

Q1: How can I confirm that the 2.6 in penetration will place the probe correctly?

Compare the housing and probe dimensions with the machine drawing, including the mounting datum, target location, and available clearance. Penetration is a mechanical dimension, not the operating gap between the probe tip and the shaft. Confirm the final gap using the approved commissioning procedure.

Q2: What happens if the cable diameter falls between the listed grommet ranges?

Do not force the cable into a grommet that does not fit. Measure the cable's actual outside diameter and confirm an approved sealing solution with the supplier or manufacturer. An unsuitable grommet can compromise cable retention and environmental sealing.

Q3: Can IP66 or Type 4X protection be used as evidence that the housing can withstand process pressure?

No. These ratings relate to environmental protection, not pressure-vessel capability. The supplied specifications explicitly state that the housing is not designed to resist internal or external pressure. Review the process boundary separately and request an approved pressure-seal test when the application requires one.

Q4: Which installation checks are most useful after replacing the housing?

Check the mounting thread, adapter and penetration dimensions, cable grip, seal condition, cover closure, and retaining-nut torque. Then verify the probe gap and signal through the connected Proximitor sensor and monitor. Record the final readings to establish a useful maintenance baseline.

Q5: What information should I send when requesting a replacement or an alternative model?

Provide the full existing part number, the proposed replacement number, the probe model, mounting drawing, measured penetration and standoff dimensions, cable outside diameter, and site temperature or environmental requirements. Include hazardous-area requirements where applicable. This information helps the supplier assess fit and avoid an unverified substitution.

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