Bently Nevada 129957-085-310-CN Proximity Probe

Bently Nevada 129957-085-310-CN Proximity Probe

• Manufacturer & Model: Bently Nevada 129957-085-310-CN proximity probe for 3300 XL series vibration monitoring systems.
• Product Type: Eddy current proximity probe for shaft vibration and position measurement.
• Series: 3300 XL high-performance probe system.
• Made in: U.S.A.
• Probe Diameter: 8 mm (0.315 in) tip diameter.
• Linear Range: 2 mm (80 mils) from target surface.
• Sensitivity: 7.87 V/mm (200 mV/mil) at nominal gap.
• Sensitivity Tolerance: ±5% at 25°C ambient temperature.

Electrical Specifications

• Supply Voltage: -17.5 Vdc to -26 Vdc, nominal -24 Vdc.
• Supply Current: Less than 12 mA per probe.
• Output Impedance: 50 ohms typical.
• Output Voltage Swing: -2 Vdc to -18 Vdc over linear range.
• Ripple & Noise: Less than 10 mV peak-to-peak at 10 kHz bandwidth.
• Linear Deviation: ≤ ±0.3% over full linear range at 25°C.
• Resolution: 0.38 µm (15 microinches) typical.
• Frequency Response: 0 Hz to 10 kHz (DC to 10 kHz).

Model Number Breakdown

• 129957-085-310-CN: Complete probe assembly part number.
• 129957: Base probe model number for 8mm 3300 XL probe.
• 085: Probe case length in mm (85 mm standard).
• 310: Cable length in cm (310 cm = 3.1 meters).
• CN: Connector type (CN = Standard coaxial connector).

Physical Specifications

• Probe Case Length: 85 mm (3.35 in) from case end to tip.
• Probe Thread Size: 3/8-24 UNF for standard mounting.
• Case Material: 316 stainless steel.
• Tip Material: High-temperature PEEK resin.
• Cable Length: 3.1 meters (10.2 ft) overall.
• Cable Type: Armored coaxial cable with FEP insulation.
• Cable Diameter: 4.5 mm (0.177 in).
• Connector Type: CN (Standard coaxial, compatible with 3300 XL proximitors).
• Total Weight: Approximately 0.35 kg (0.77 lb).

Environmental Specifications

• Probe Tip Temperature: -35°C to 177°C (-31°F to 350°F).
• Cable Temperature: -35°C to 105°C (-31°F to 221°F).
• Connector Temperature: -35°C to 85°C (-31°F to 185°F).
• Storage Temperature: -40°C to 177°C (-40°F to 350°F).
• Humidity: 100% condensing with proper sealing.
• Pressure Rating: 3000 psi (20.7 MPa) for probe and connector.
• Fluid Resistance: Resistant to water, oil, hydrocarbons, and process fluids.

Accuracy and Stability

• Temperature Stability: ±0.1% change in sensitivity per 10°C.
• Interchangeability Error: ±5% maximum with same model probes.
• Long-term Drift: Less than 0.1% per year at constant temperature.
• Hysteresis: Less than 0.1% of linear range.
• Repeatability: ±0.05% of full scale.
• Target Material: Calibrated for AISI 4140 steel (42 Rockwell C).

System Compatibility

• Compatible Proximitor: 3300 XL 8mm Proximitor (model 330180-90-00).
• Compatible Extension Cables: 3300 XL series extension cables (if needed).
• Compatible Monitoring Systems: 3500 Series, 1900 Series, or 2300 Series.
• CN Connector: Direct connection to 3300 XL Proximitor input.

Package Contents and Shipping Information

• Included Components: 129957-085-310-CN probe with attached coaxial cable and CN connector.
• Accessories: Mounting hardware kit and installation instructions.
• Certification: Individual calibration certificate with sensitivity data.
• Shipping Weight: Approximately 0.45 kg (1.0 lb).
• Shipping Dimensions: 350 mm x 150 mm x 50 mm protective box.
• Express Shipping Options: FedEx, UPS, or DHL worldwide.

Frequently Asked Questions

• Q: What is the Bently Nevada 129957-085-310-CN proximity probe?
  A: This is a 3300 XL series 8mm eddy current proximity probe. It measures shaft vibration, position, and eccentricity in rotating machinery.
• Q: What does the -085-310-CN suffix mean?
  A: The 085 means 85mm probe case length. The 310 means 310cm (3.1m) cable length. CN indicates standard coaxial connector for 3300 XL Proximitors.
• Q: What is the measurement range of the 129957-085-310-CN probe?
  A: The linear range is 2 mm (80 mils). Sensitivity is 7.87 V/mm (200 mV/mil) with AISI 4140 steel target.
• Q: What proximitor works with this probe?
  A: Use the 3300 XL 8mm Proximitor (model 330180-90-00). The CN connector plugs directly into this proximitor.
• Q: What temperature range does the probe tip handle?
  A: The PEEK tip operates from -35°C to 177°C (-31°F to 350°F). The cable works up to 105°C (221°F).