Introduction
The model 330730-080-00-05 is an 8mm Proximity Probe from the Bently Nevada 3300 XL series. This is the core sensing element of a proximity transducer system, an eddy current sensor designed to measure the relative vibration and position of a rotating shaft. The -080 suffix specifies an 8mm probe tip diameter, and the -00-05 defines the specific mechanical and electrical configuration, including the connector type and cable length/exit style. This robust sensor is a fundamental component for machinery protection on critical high-speed equipment like turbines and compressors.
Parameters / Specifications
The following table outlines the key technical parameters for the 330730-080-00-05 proximity probe.
| Parameter | Specification |
|---|---|
| Model Number | 330730-080-00-05 |
| Description | 8mm Proximity Probe (Eddy Current Sensor) |
| Physical Dimensions | Approx. 66 mm (2.6 in) length (excluding connector and cable) x 17.5 mm (0.69 in) hex. |
| Weight | Approx. 0.15 kg (0.33 lb) |
| Probe Tip Diameter | 8 mm (0.315 in) |
| Operating Principle | Eddy Current |
| Linear Range | 0.25 to 2.3 mm (10 to 90 mils) from target (typical) |
| Sensitivity | System-dependent, typically -8.00 V/mm (± 5%) when used with a matched 3300 XL Proximitor. |
| Target Material | AISI 4140 Steel or equivalent (material calibration is required). |
| Temperature Rating | Standard: -34°C to +177°C (-29°F to +350°F) High-Temp: Up to +260°C (+500°F) available with different part numbers. |
| Electrical Connection | Integral coaxial cable with a military-style (e.g., MS3112F-20-29S) connector. The -05 suffix often indicates a top exit connector configuration. |
| Cable | Integral, high-temperature, shielded coaxial cable. |
| Housing Material | Stainless Steel |
Note: This probe must be used with a compatible extension cable and a matched 3300 XL Proximitor (signal conditioner) to form a complete, calibrated measurement system. The system's performance is dependent on all components being matched.
Application Scenarios
This 8mm proximity probe is a industry-standard sensor used for critical measurements on rotating machinery.
Radial Shaft Vibration Monitoring:
The primary application is measuring radial vibration of a shaft relative to its bearing housing. This is the fundamental measurement for detecting imbalance, misalignment, and shaft instability on turbines, compressors, and large pumps.
Axial Thrust Position Monitoring:
Used to measure the axial (thrust) position of a rotor to monitor thrust bearing wear and prevent catastrophic failure due to excessive rotor movement.
Keyphasor® Reference Signal:
Serves as the once-per-revolution timing marker by observing a keyway or notch on the shaft. This Keyphasor signal is essential for determining vibration phase angle and for speed measurement.
Radial Position (Centerline) Measurement:
Used in pairs (X and Y directions) to determine the average position of the shaft within the bearing clearance, providing insight into bearing alignment and machine centerline.
API 670 Compliant Machinery Protection:
This 8mm probe is a standard sensor specified in systems designed to meet the API 670 standard for machinery protection systems, ensuring reliable and qualified protection for critical assets in the oil, gas, and petrochemical industries.
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