Overview
The Bently Nevada 31000 proximity probe housing (part 31000-00-00-15-285-03-02) is an industrial-grade enclosure assembly designed to house and protect proximity probes used in shaft vibration and axial displacement monitoring systems. The Bently Nevada 31000 Series is an industrial-grade shaft vibration and displacement monitoring system designed specifically for monitoring the health of rotating machinery, capable of simultaneously measuring shaft vibration and axial displacement with high-precision, high-reliability monitoring data. Proximity probes use changes in voltage to measure rotating or reciprocating shaft surfaces, and because they are non-contacting transducers, they mount on reasonably stationary mechanical structures, such as bearing housings.
Key Features
- Type 4X stainless steel enclosure certified for harsh industrial environments
- IP66 rating provides full dust and water ingress protection
- 15mm probe penetration allows precise gap measurement to rotating shafts
- 3/4-14 NPT mounting thread for standard bearing pedestal installation
- Operating temperature range -51°C to +105°C (-60°F to +221°F)
- Four holes in housing base accept sleeve or conduit fittings and cable glands, with fittings supplied depending on English, metric, or DIN type
Technical Specifications
- Housing Material: Glass-reinforced PPS thermoplastic with conductive fibers
- Sleeve & Retaining Chain: AISI 304 stainless steel
- Exterior Screws: AISI 303 stainless steel
- Probe Penetration: 15mm (option code 15)
- Cable Length: 2.85m (option code 285)
- Mounting Thread: 3/4-14 NPT (option code 02)
- Protection Rating: Type 4X (CSA), IP66
- Temperature Rating: -51°C to +105°C
- Fittings: Two plugs, one 3/4-14 NPT fitting, cable seal grip (option code 03)
Typical Applications
The 31000 housing is widely used in:
- Turbomachinery condition monitoring (turbines, compressors, pumps)
- Motor and generator shaft displacement measurement
- Rotating equipment health diagnostics in refineries and power plants
- Predictive maintenance programs requiring continuous shaft position feedback
- OEM factory installations and retrofit upgrades on machinery
Compatibility & Replacements
Compatible With
- Bently Nevada 3300 series proximity probes (standard and XL variants)
- Bently Nevada Proximitor signal conditioners and monitoring systems
- Standard bearing pedestals and mounting blocks with 3/4-14 NPT threads
- Cable lengths up to 2.85m with standard conduit fittings
- Machinery mounted on stationary steel structures and bearing housings
Replaces / Drop-In Replacement For
- 31000 series housings with equivalent probe penetration and cable length specifications
- Earlier Bently Nevada proximity probe housings where thread and fittings match 3/4-14 NPT configuration
- Verify compatibility with your system integrator before ordering to confirm probe probe option and cable length match your installation
Works With
- Bently Nevada monitoring and diagnostics software platforms
- Standard industrial signal conditioners accepting Proximitor probe outputs
- PLC and DCS systems with analog input modules (4–20mA or 0–10V protocols)
- PROFIBUS, Modbus, and Ethernet-based industrial networks via gateway converters
- Machinery health management systems requiring ISO 20816 vibration compliance
