330101-29-50-10-02-05 Proximity Transducer System (PTS)
Description:
The part number 330101-29-50-10-02-05 refers to a specific configuration of a Proximity Transducer System (PTS) from Baker Hughes (Bently Nevada). This system is a complete kit designed for a single channel of measurement on rotating machinery, used to monitor radial vibration, axial position, or speed.
It is an integrated package that contains all matched components:
Proximity Probe: The sensor that measures 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 signal into a standardized voltage output.
The numbers in the part string specify the exact characteristics of each component, making this kit a pre-engineered solution for a specific set of mechanical and electrical requirements.
Parameters & Specifications
The following table details the key parameters for this specific configuration based on the standard Bently Nevada part numbering scheme.
| Parameter | Specification / Interpretation |
|---|---|
| Part Number | 330101-29-50-10-02-05 |
| System Type | Proximity Transducer System (PTS) |
| System Function | Vibration / Position / Keyphasor® Measurement |
| Probe Model / Length | -29- = A specific 8mm diameter probe with a length of 50 mm (1.97 inches) from mounting thread to tip. |
| Cable Length | -50- = 50 feet (15.2 meters) of integral cable plus extension cable. |
| Connector Type | -10- = Standard "English" Thread (UNF 5/8-24) on the probe. |
| Electrical Termination | -02- = Typically indicates a connectorized end for the extension cable (e.g., a Bendix or TNC connector). |
| Proximitor Model | -05 = Likely refers to a standard 5-meter (16.4 ft) coaxial cable and a specific proximitor version (e.g., 330100 or 3300 XL 8mm). |
| Probe Diameter | 8 mm (standard for this series) |
| Target Material | AISI 4140 Steel or equivalent (standard for calibration). |
| Linear Range | Typically 0.2 to 0.9 mm (8 to 36 mils) |
| Scale Factor | 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. |
| Operating Temperature (Probe) | Up to 177°C (350°F) with standard cable. |
| Typical Probe Weight | ~ 0.1 kg (0.22 lbs) |
| Typical Proximitor Weight | ~ 0.5 kg (1.1 lbs) |
Important Note: *The interpretation of suffixes like "-29-" and "-02-" can be specific. For absolute precision, mechanical drawings, and installation details, consulting the official Baker Hughes Bently Nevada PTS Selection Guide for this exact part number is essential.*
Application Scenarios
This Proximity Transducer System is used for high-reliability machinery protection and monitoring. Its specific probe length and cable make it suitable for applications where the measurement point is located a moderate distance from the proximitor mounting location.
Shaft Radial Vibration Monitoring: The primary application. Measures the dynamic motion of a rotor relative to its bearings to detect and protect against:
Imbalance
Misalignment
Shaft Rubs
Oil Whirl
Shaft Axial Position (Thrust) Monitoring: Used to monitor the position of a turbine or compressor rotor in the axial direction to prevent catastrophic thrust bearing failure.
Keyphasor® Reference Signal: A dedicated proximity probe system is used to generate a once-per-revolution pulse. This signal is critical for measuring rotational speed (RPM) and vibration phase angle, which are indispensable for machine diagnostics and balancing.
Eccentricity Monitoring: Measures the slow-roll runout or bow of a shaft at low speeds during startup and coast-down.
Differential Expansion Monitoring: On large steam turbines, it measures the relative growth between the rotor and the stationary casing.
Typical Machinery:
Steam Turbines & Gas Turbines
Centrifugal & Axial Compressors
Large Pumps & Fans
Turbo-generators
Gearboxes
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