Engineering Overview
Optimized Signal Transmission for Machinery Monitoring
The 21747-040-01 serves as the communication link between the proximity probe and the Proximitor sensor, ensuring accurate transmission of eddy current signals without compromising system linearity or calibration. The cable is factory manufactured to a specified length and should not be shortened or modified, as total system length is essential for measurement accuracy.
Its armored outer layer enhances durability against abrasion, vibration, and mechanical damage, making it well suited for demanding installations in power generation, oil & gas, petrochemical, and heavy manufacturing facilities.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Bently Nevada |
| Model Number | 21747-040-01 |
| Product Type | Proximitor Probe Extension Cable |
| Cable Type | Shielded Coaxial Extension Cable |
| Cable Length | 4.0 m (157 in) |
| Armor Option | 01 – Armored |
| Connector Type | Miniature Coaxial Male to Female |
| Compatible Systems | 7200 Series, Selected 3300 Series |
| Signal Type | Eddy Current Sensor Signal |
| Cable Construction | Industrial Shielded Coaxial |
| Origin | Made in U.S.A. |
| Approximate Dimensions | 4.0 m Overall Length |
| Approximate Weight | 0.33 kg |
Typical Applications
The 21747-040-01 is widely used wherever reliable proximity transducer signal transmission is required.
| Industry | Typical Equipment |
|---|
| Power Generation | Steam turbines, generators |
| Oil & Gas | Compressors, pumps, expanders |
| Petrochemical | Process compressors and rotating machinery |
| Mining | Large motors and crushers |
| Manufacturing | Gearboxes, fans, industrial motors |
Common applications include:
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Shaft vibration monitoring
-
Radial displacement measurement
-
Axial position monitoring
-
Rotor dynamic analysis
-
Machinery protection systems
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Predictive maintenance programs
Key Benefits
Armored Cable Construction
The armored outer layer provides enhanced protection against mechanical wear, vibration, abrasion, and accidental impact, helping extend cable service life in demanding industrial environments.
Stable Signal Integrity
The shielded coaxial design minimizes electromagnetic interference (EMI), ensuring consistent transmission of proximity probe signals between the probe and Proximitor sensor.
Factory-Calibrated System Compatibility
The cable length is factory specified to maintain proper calibration of the complete proximity transducer system. Maintaining the correct total probe-plus-extension-cable length is essential for accurate measurements.
Flexible Installation
With a 4-meter overall length, the cable allows greater flexibility when locating Proximitor sensors away from high-temperature or high-vibration areas while maintaining measurement accuracy.
Built for Industrial Reliability
Designed for continuous operation in harsh industrial environments, the cable supports long-term machinery monitoring with minimal maintenance requirements.
Technical FAQs
1. What is the 21747-040-01 used for?
It connects a proximity probe to a Proximitor sensor within a Bently Nevada proximity transducer system.
2. What does the "040" option represent?
It specifies a 4.0-meter (157-inch) cable length.
3. What does the "01" suffix indicate?
It designates the armored cable configuration, providing additional mechanical protection.
4. Which systems are compatible with this extension cable?
It is commonly used with 7200 Series and selected 3300 Series proximity transducer systems.
5. Can the cable be shortened?
No. The cable is factory calibrated, and cutting or shortening it can affect measurement accuracy and system performance.
6. What connector style does it use?
It features miniature coaxial male and female connectors for easy integration with compatible probes and Proximitor sensors.
7. Why is shielding important?
Shielding helps reduce electromagnetic interference, maintaining accurate signal transmission in electrically noisy industrial environments.
8. Is the cable suitable for harsh environments?
Yes. Its armored construction is specifically designed to withstand vibration, abrasion, and industrial operating conditions.
9. Does the extension cable affect system calibration?
Yes. The combined length of the probe and extension cable must match the Proximitor sensor configuration to maintain factory calibration.
10. Which machines commonly use this cable?
It is widely installed on turbines, compressors, generators, pumps, motors, and other critical rotating machinery utilizing Bently Nevada proximity monitoring systems.
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