Introduction
The component with part number 330180-X2-05 181634-01 is a key part of the 3300 XL Proximity Transducer System manufactured by Bently Nevada* (a Baker Hughes company). This part number refers to an 8mm Proximity Probe.
This sensor is a non-contact device designed to measure the relative vibration and position of a rotating shaft. It operates on the eddy current principle, where an RF signal from a proximitor driver is emitted from the probe tip. Changes in the distance to the shaft (the gap) alter the amplitude of this signal, which is then converted into a precise voltage proportional to the gap. The "X2-05" suffix typically denotes a specific variant, often related to a high-temperature rating and a 5-meter cable length.
*Bently Nevada is a part of Baker Hughes.
Parameters
The following table outlines the key technical parameters for the 330180-X2-05 181634-01 proximity probe.
| Parameter | Specification |
|---|---|
| Part Number | 330180-X2-05 181634-01 |
| Description | 8mm Proximity Probe (High-Temperature) |
| Probe Diameter | 8 mm (0.31 inches) |
| Operating Principle | Eddy Current |
| System Scale Factor | 200 mV/mil (7.87 V/mm) when used with a compatible proximitor. |
| Linear Range | Approximately 0.25 to 2.3 mm (10 to 90 mils) from the target. |
| Recommended Target | ASTM A284 Steel or equivalent (required for proper calibration). |
| Temperature Rating | High-Temperature: Up to 177°C (350°F) with high-temperature cable. |
| Cable Length | 5 meters (16.4 feet) |
| Electrical Connection | Integral high-temperature cable with a standard Bently Nevada connector. |
| Thread | 1-1/4 UNF (for mounting in a threaded bushing) |
| Dimensions (Probe Body) | Diameter: 8 mm, Length: ~50-70 mm (varies by model) |
| Weight (Approx., with 5m cable) | 0.5 kg (1.1 lb) |
Application Scenarios
The 330180-X2-05 8mm proximity probe is a fundamental sensor for machinery condition monitoring and protection in high-temperature environments. Its primary application scenarios include:
Radial Vibration Monitoring on Hot Machinery:
Mounted perpendicular to the shaft at bearing housings on turbines and compressors that operate at high temperatures. It measures the dynamic motion (vibration) of the rotor relative to the bearing.
Keyphasor® Reference Signal in High-Temp Areas:
Used to provide a once-per-revolution timing mark by observing a keyway or notch on a high-temperature shaft. This signal is critical for measuring phase lag and speed.
Axial (Thrust) Position Monitoring:
Mounted parallel to the shaft axis to monitor the position of the thrust collar in hot environments, ensuring the rotor remains within its designed axial clearance.
Eccentricity (Slow-Roll) Monitoring on Turbines:
Measures shaft bow or bend on large steam or gas turbines when the machine is at low speeds or on turning gear.
Differential Expansion Monitoring:
Used on large turbines to measure the difference in thermal growth between the rotor and the stator (casing), where probe locations can be subjected to high ambient temperatures.
Typical Machinery Monitored:
Steam Turbines & Gas Turbines
Centrifugal & Axial Compressors
Large Pumps & Motors in hot processes
Generators
Fans & Gearboxes in high-temperature environments
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