330101-00-68-10-12-05 Proximity Transducer System (PTS)
Description:
The part number 330101-00-68-10-12-05 refers to a complete, pre-calibrated Proximity Transducer System (PTS) from Baker Hughes (formerly Bently Nevada). This system is a fundamental component for monitoring radial vibration and axial position (thrust) on rotating machinery.
It is an integrated kit that contains all necessary components for a single channel of measurement:
Proximity Probe: The sensor itself that measures the distance to the target.
Extension Cable: Connects the probe to the proximitor.
Proximitor: The oscillator/demodulator that powers the system and converts the probe's gap signal into a standardized voltage output.
The numbers in the part string (e.g., -68-, -10-, -12-) specify the exact characteristics of each component, such as probe length, connector type, cable length, and proximitor model, ensuring they are matched for optimal performance.
Parameters & Specifications
The following table details the key parameters for this specific configuration. The specifications are derived from the standard meaning of the numbers in the Bently Nevada part numbering system.
| Parameter | Specification / Interpretation |
|---|---|
| Part Number | 330101-00-68-10-12-05 |
| System Type | Proximity Transducer System (PTS) |
| System Function | Vibration / Position Measurement |
| Probe Length | -68- = 68 mm (2.68 inches) from mounting thread to tip. |
| Connector Type | -10- = Standard "English" Thread (UNF 5/8-24) on the probe. |
| Cable Length | -12- = 12 meters (40 feet) of extension cable. |
| Proximitor Model | -05 = Likely refers to a standard 5-meter (16.4 ft) coaxial cable between the extension cable and the proximitor, and a specific proximitor version (e.g., 330100 or 3300 XL 8mm). |
| Target Material | AISI 4140 Steel or equivalent (standard for calibration). |
| Linear Range | Typically 0.2 to 0.9 mm (8 to 36 mils) for a standard 8mm probe. |
| Scale Factor | Typically 7.87 V/mm (200 mV/mil) |
| Power Supply | Proximitor typically requires -17 to -26 VDC. |
| Output Signal | -1 to -11 VDC (or 0 to -22 VDC for two-wire systems) proportional to gap. |
| Typical Probe Diameter | 8 mm (standard) |
| Typical Probe Weight | ~ 0.1 kg (0.22 lbs) |
| Typical Proximitor Weight | ~ 0.5 kg (1.1 lbs) |
Important Note: *The exact dimensions and weights are approximate. The "-05" suffix can have specific interpretations regarding the proximitor's internal configuration and cable type. For absolute precision and installation, consulting the official Baker Hughes Bently Nevada PTS Selection Guide or the specific datasheet for this exact part number is essential.*
Application Scenarios
This Proximity Transducer System is a workhorse for machinery condition monitoring across various industries. Its primary applications include:
Shaft Radial Vibration Monitoring: The most common application. Measures the dynamic motion of a rotor relative to its bearings to detect issues like:
Imbalance
Misalignment
Oil Whirl
Rotor Rubs
Shaft Axial Position Monitoring: Used to monitor the thrust position of a rotor within a turbine or compressor to prevent catastrophic damage from:
Excessive thrust bearing wear
Rotor-to-stator contact due to thermal expansion
Differential Expansion Monitoring: On large steam turbines, measures the difference in thermal growth between the rotor and the casing.
Eccentricity (Slow-Roll) Monitoring: Measures the mechanical and thermal bow of a shaft at low speeds during startup and coast-down.
Keyphasor® Reference Signal: A proximity probe is used to generate a once-per-revoluti>on pulse for measuring speed and phase angle.
Typical Machinery:
Steam Turbines & Gas Turbines
Centrifugal & Axial Compressors
Large Pumps & Fans
Electric Motors & Generators
Gearboxes
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