Configured for mechanical encapsulation and positioning of proximity transducers in Machinery Protection Systems, the Bently Nevada 31000-28-10-00-010-01-02 (31000 Proximity Probe Housing) provides direct physical execution. The assembly enables external modification of the sensor gap relative to the monitored shaft face or probe replacement without breach or disassembly of the machine case boundary. It facilitates radial vibration or Keyphasor measurements by sealing differential pressure between the internal probe tip and the housing body.

Product Selection Profile Matrix

• 31000: English Proximity Probe Housing Assembly (API 670 Compliant)

• -28: Probe with Connector Option (3300 XL 8 mm probe, multiple approvals)

• -10: Probe Cable Length Option (1.0 m [39 in] cable length)

• -00: Standoff Adapter Length Option (No standoff adapter configuration)

• -010: Probe Penetration Option (1.0 in nominal insertion length)

• -01: Fittings Option (One 3/4-14 NPT fitting, two plugs)

• -02: Mounting Thread Option (3/4-14 NPT process entry sleeve connection)

Mechanical Design Parameters

Eddy-Current Probe Scaling and Gap Voltage Validation

The glass-reinforced polyphenylene sulfide (PPS) housing configuration features conductive fibers that comply with the CENELEC EN50014 standard for electrostatic dissipation in hazardous area platforms. The rigid internal AISI 304 stainless steel sleeve maintains coaxial guidance over the internal 3300 XL 8 mm sensor body. This structural rigidity prevents deflection under transient load states, isolating the dynamic transmission path to preserve the calibrated eddy-current probe scaling metrics. By isolating the internal cable connector fields from external liquids and contaminants, the housing stabilizes the loop output during manual adjustments, allowing field technicians to set and maintain the standard static gap voltage validation target at -10 VDC. This stable tracking minimizes signal distortion during high-velocity rotor dynamics and sustains high cross-talk suppression between close-proximity radial pairs.

Transducer Circuitry Technical Diagnostics

Q: Can the internal proximity sensor capsule be extracted or replaced while the monitor rack remains powered?

A: Yes. Extracting the internal sensor insert through the housing sleeve while the loop is live causes no electrical damage. However, removing the probe from the target surface shifts the Proximitor loop output to maximum negative saturation, which will execute active machine trip interlocks unless the channel is bypassed.

Q: How does a fluid leak past the internal seal network alter the transducer measurement?

A: Failure of the internal Neoprene sleeve O-ring or probe Viton seal allows high-pressure machine oil or process gases to fill the housing body cavity. Liquid accumulation around the unshielded coaxial connection point induces an uncontrolled loop capacitance shift, corrupting the calibrated eddy-current probe scaling and causing continuous drift in the static gap voltage validation.

Q: Can this plastic housing assembly be deployed as an explosion-proof containment barrier?

A: No. The glass-reinforced PPS housing assembly is engineered to provide mechanical and environmental protection only (NEMA 4X/IP66). It is not an explosion-proof housing; applications demanding explosion-proof certification must utilize Bently Nevada CA21000 or CA24701 housing series.

Field Layout and Adjustment Protocols

• Mounting Engagement: Thread the outer sleeve into the machine case tapping, confirming a minimum of 5 full threads of engagement. Verify that the machine casing is structurally affixed to the bearing housing to achieve accurate relative vibration signals for radial measurements.

• Sleeve Retaining Nut Torque: Adjust the probe sleeve depth until the active Proximitor circuit reflects the target -10 VDC baseline voltage. Tighten the outer sleeve retaining nut to a terminal torque specification of 29.4 N-m (260 in-lb) to prevent axial movement under machine case vibration.

• Conduit Sealing and Plugs: Install the 3/4-14 NPT conduit fitting using thread sealant. Insert the provided blanking plugs into any unused access holes on the housing base, and tighten the hole plug nuts to a value of 0.5 N-m (5 in-lb) to maintain the NEMA 4X/IP66 ingress protection profile.

Procurement Package Content

• 1 x Bently Nevada 31000 Glass-Reinforced PPS Housing Base and Cover

• 1 x Pre-installed 3300 XL 8 mm Proximity Probe (1.0 m Cable)

• 1 x AISI 303/304 Stainless Steel Outer Sleeve Assembly (3/4-14 NPT)

• 1 x 3/4-14 NPT Conduit Fitting and 2 x Blanking Plugs

Logistics Despatch Management

Delivery time: 2-7 days when payment finish parameters are updated in the commercial processing module. Freight dispatches deploy directly from the central storage hub in Xiamen, China via express international logistics networks including DHL, FEDEX, or UPS. The parts travel inside double-walled corrugated shipping cartons containing custom-fit shock-absorbing poly-foam inserts to protect the machined threads, sealing faces, and PPS composite elements from physical distortion during transport, arriving in anti-static industrial packaging.