21747-045-01 Bently Nevada Extension Cable 4.5m Armored 21747 New

Product Introduction

The 21747-045-01 serves as a critical link in Bently Nevada Proximitor sensor systems. This high-precision extension cable maintains signal integrity between the probe and the transducer. Engineering teams prioritize the 21747 series to ensure accurate radial vibration and axial position measurements in harsh industrial environments.

We advise technical personnel to verify the total system length (5m or 9m) before installation. You can access the 21747-045-01 technical manual and wiring diagrams via the manufacturer portal for precise phase trigger and gap voltage calibration steps.

Configuration Breakdown

• 21747 Base Model: Proximity Extension Cable
• └── -045 Length Option: 4.5 Metres (17.7 Feet)
•     └── -01 Armor Option: Stainless Steel Armor Included

Technical Performance Matrix

• Brand: Bently Nevada / Baker Hughes
• Model Number: 21747-045-01
• System Compatibility: 3300 and 7200 5mm/8mm Proximity Transducer Systems
• Frequency Response: 0 to 10 kHz (0 to 600,000 cpm)
• Scale Factor: 200 mV/mil (7.87 V/mm)
• Linearity Range: 80 mils (2.0 mm) starting at 10 mils from probe face
• Operating Temperature: -34°C to +177°C (-30°F to +350°F)
• Humidity Resistance: 95% Non-condensing
• Chemical Tolerance: Resistant to Lube Oil, Water, and 10% Sulfuric Acid
• Interchangeability Error: Within 2.3 mils (0.06 mm) including system tolerances

Application & Diagnostic Capabilities

• Target Equipment: Steam Turbines, Centrifugal Compressors, and Large Electric Motors.
• Vibration Monitoring: Facilitates accurate "Gap Voltage" diagnostics to determine probe-to-target distance.
• Armor Protection: The 21747-045-01 armor protects against "pinch points" and sharp edges in oily environments.
• Signal Integrity: Low-impedance design minimizes noise floor during high-frequency shaft observation.

Logistics & Warranty

• Condition: Brand New & Original in Factory Sealed Packing.
• Warranty Policy: 12-Month standard factory warranty.
• Dispatch Window: Ships within 24-48 hours.
• Express Delivery: Global fulfillment via FedEx, UPS, and DHL Express.

FAQ & Engineering Selection Guide

How does the armor on the 21747-045-01 affect signal transmission?

The armor is purely mechanical protection; the internal coaxial core is electrically isolated to maintain the 200mV/mil scale factor.

Can I connect a 4.5m cable to a 1m probe for a 5m system?

Yes, the 21747-045-01 is specifically designed to create a calibrated 5-metre total system length when paired with a 0.5m or 1m probe.

What happens if the cable length is modified in the field?

Never cut or splice the 21747 cable. The system is tuned to a specific electrical length; altering it will cause significant linearity errors.

Is this cable compatible with the newer 3300 XL series?

While physically compatible, the 21747 is optimized for non-XL 3300/7200 systems. Check your Proximitor part number for matched impedance.

Selection Guidance:

If your installation involves cable trays with heavy foot traffic or proximity to moving parts, always specify the -01 armor option found in the 21747-045-01 to avoid costly sensor downtime.

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