Bently Nevada 330140-08-90-12-00-00 3300 XL 8mm Proximity Probe

Bently Nevada 330140-08-90-12-00-00 3300 XL Proximity Probe

The Bently Nevada 330140-08-90-12-00-00 represents cutting-edge eddy current sensing technology for continuous machinery health monitoring. This 8mm proximity probe delivers unmatched reliability in measuring radial shaft position, axial displacement, and dynamic vibration across turbomachinery installations worldwide.

Technical Parameters

• Part Number: 330140-08-90-12-00-00
• Sensing Element: 8mm diameter eddy current coil
• Active Probe Length: 90mm (3.54 inches)
• Thread Configuration: 5/8-18 UNF-2A standard
• Supply Voltage: -24 VDC (supplied via Proximitor)
• Bandwidth: DC to 10 kHz (-3dB point)
• Operating Temperature: -30 °C to +120 °C continuous
• Housing Material: 316 stainless steel with PEEK isolation
• Cable Type: Integral armored low-noise coaxial
• Connector: BNC male termination
• Linearity: ±2% over calibrated range

Engineering Advantages

This proximity probe leverages eddy current principles to deliver maintenance-free, non-contact measurement with exceptional signal integrity. The 8mm sensing diameter provides optimal balance between sensitivity and target area requirements, while the 90mm active length accommodates diverse mounting configurations in space-constrained installations.

• Zero mechanical wear ensures decades of reliable operation
• Factory-matched calibration with 3300 XL Proximitor sensors
• Hermetically sealed construction resists moisture, oil, and contaminants
• Wide frequency response captures both slow roll and high-frequency events
• Stainless steel construction withstands corrosive industrial atmospheres
• Low-noise cable design maintains signal fidelity over extended runs

Industrial Application Scenarios

Power Generation: Monitor journal bearing clearances and thrust position in steam turbines, gas turbines, and hydro generators. The probe’s thermal stability ensures accurate measurements across startup, steady-state, and shutdown cycles.

Oil & Gas Processing: Track compressor rotor position and detect incipient bearing failures before catastrophic damage occurs. Ideal for API 670 compliant machinery protection systems in hazardous area classifications.

Petrochemical Plants: Continuous surveillance of centrifugal pump shaft runout and motor coupling alignment. The probe’s chemical resistance makes it suitable for aggressive process environments.

Pulp & Paper Mills: Real-time monitoring of dryer roll eccentricity and press section vibration. Robust design handles high-humidity conditions and temperature cycling.

Mining Operations: Condition monitoring for crushers, mills, and conveyor drive systems where dust and shock loads challenge conventional sensors.

Complete System Integration

Deploy this probe as part of a comprehensive 3300 XL monitoring solution. When connected to a compatible Proximitor sensor and extension cable, the system provides 4-20mA output, relay contacts, and digital communication for integration with DCS, PLC, or dedicated machinery monitoring platforms. The modular architecture simplifies installation, commissioning, and future expansion.

Frequently Asked Questions

Q: What is the minimum target diameter for accurate measurement?
A: The target shaft should be at least 24mm (3 probe diameter) to ensure uniform eddy current field distribution and linear response.

Q: Can this probe operate in explosive atmospheres?
A: When paired with intrinsically safe barriers and certified Proximitor sensors, the system meets Class I Division 2 and ATEX Zone 2 requirements. Consult factory for specific certifications.

Q: What is the typical installation gap setting?
A: Set the probe tip 1.5mm ± 0.5mm (60 ± 20 mils) from the target surface for optimal linearity and dynamic range.

Q: Is recalibration required after installation?
A: No. The probe is factory-calibrated as a matched set with its Proximitor sensor. Field calibration is only needed if components are mixed or replaced.

Q: How do I verify probe functionality?
A: Use a Bently Nevada TK-3 test kit or equivalent to inject calibrated gap changes and verify system response across the full measurement range.

Warranty & Technical Support

Every Bently Nevada proximity probe is backed by a comprehensive 12-month warranty against manufacturing defects. Our global support network provides application engineering, installation assistance, troubleshooting guidance, and calibration services to maximize system uptime and measurement accuracy.

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