Introduction
The part number 330104-01-05-50-02-05 is a highly specific configuration of an eddy current proximity probe system, commonly associated with manufacturers like Bently Nevada (now part of Baker Hughes). This part number does not refer to a single component, but rather a complete kit that includes all necessary parts for installing a proximity transducer. These systems are fundamental for measuring the relative vibration and position of a rotating shaft relative to its bearing housing, as well as providing a Keyphasor® timing reference.
Technical Parameters
The following table breaks down the typical specifications for a kit of this type. The suffix codes (-01-05-50-02-05) define the exact configuration.
| Parameter Category | Specification |
|---|---|
| Part Number | 330104-01-05-50-02-05 |
| Description | Eddy Current Proximity Probe System / Kit |
| System Components | 1. Proximity Probe 2. Extension Cable 3. BNC Connector |
| Probe Diameter | 8 mm (0.315 in) - This is typically defined by the "04" in the base number. |
| Probe Tip Material | Stainless Steel with a sensing coil protected by a non-conductive material (e.g., epoxy). |
| System Length | 5 meters (16.4 feet) of cable from probe tip to connector. This is defined by a suffix like "-05". |
| Cable Type | Double-shielded, armored cable for noise immunity and durability. |
| Electrical Compatibility | Designed to work with a compatible proximitor (e.g., 3300, 3500 series) that provides -24 VDC power and conditions the signal. |
| Sensitivity | Standard 200 mV/mil (7.87 V/mm) |
| Target Material | Ferrous steel (such as AISI 4140) |
| Operating Temperature | Probe: -34°C to 177°C (-29°F to 350°F) Cable: -34°C to 177°C (-29°F to 350°F) |
| Dimensions & Weight (Probe) | Body Diameter: ~ 12 mm (0.47 in) Length: ~ 40 mm (1.57 in) Weight: ~ 0.08 kg (0.18 lbs) |
| Dimensions & Weight (Complete Kit) | Shipping Weight: Approximately 0.7 kg (1.5 lbs) |
*Note: The suffixes in the part number (e.g., -01, -05, -50, -02) specify exact details like connector type, cable length, temperature rating, and packaging. The values above are representative for an 8mm, 5-meter system. Always confirm the exact interpretation with the manufacturer's drawing or datasheet.*
Application Scenarios
This proximity probe kit is used for critical machinery protection and monitoring across various industries. Its primary applications are:
Shaft Vibration Monitoring on Turbines and Compressors:
Installed in bearing housings to measure the dynamic motion of the shaft relative to the housing. This is the primary parameter for detecting imbalance, misalignment, and shaft instability in steam turbines, gas turbines, and centrifugal compressors.
Keyphasor® Timing Reference:
A single probe is used as a Keyphasor® sensor to provide a once-per-revolution pulse. This is essential for measuring speed, determining phase angle for balancing, and observing startup/shutdown (coast-down) behavior.
Radial and Axial (Thrust) Position Monitoring:
Two probes mounted 90 degrees apart are used for radial position (shaft centerline) analysis. A dual-probe setup is used to measure thrust position (axial movement) of a shaft, crucial for preventing catastrophic damage in machines like turbines and compressors.
Eccentricity Monitoring:
Used on slow-rolling turbines to measure shaft bow or sag when the machine is not operating, ensuring it is safe to start.
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