Product Introduction
The Bently Nevada 21747-040-01 is an armored extension cable used with the 3300 XL and 7200 series proximity transducer systems. It connects the proximity probe to the Proximitor sensor, completing the probe-cable-driver loop for eddy current vibration and position measurement. This model is 4.0 meters (approximately 13.1 feet) in length, with a standard connector interface and coaxial construction. The cable is oil-resistant, crush-resistant, and rated for continuous use in harsh industrial environments. It is designed to maintain system calibration when used with compatible Bently Nevada probes and Proximitor units.
Key Specifications (including Dimensions and Weight)
| Parameter | Value |
|---|---|
| Length | 4.0 m (13.1 ft) |
| Outer diameter | 8.0 mm (0.315 in) |
| Weight | 0.55 kg (1.21 lb) |
| Connector type | 3300 XL standard coaxial connector (male on probe side, female on Proximitor side) |
| Cable construction | Coaxial, stainless steel armor over dielectric and center conductor |
| Compatible probes | 3300 XL 5 mm, 8 mm probes; 7200 series 5 mm, 8 mm probes |
| Compatible Proximitor | 3300 XL (e.g., 330180-50-00) and 7200 series driver units |
| Temperature range | -51 °C to +260 °C (-60 °F to +500 °F) |
| Insulation resistance | >10,000 MΩ at 500 VDC |
| Capacitance (nominal) | 130 pF/m (40 pF/ft) |
| Bend radius (minimum) | 50 mm (2.0 in) |
| Fluid resistance | Resistant to lubricating oil, hydraulic oil, water, steam, and mild chemicals |
Application Scenarios
The 21747-040-01 extension cable is used wherever the distance between a proximity probe and its driver exceeds the standard probe cable length. Typical applications include:
Steam and gas turbines – Connecting probes mounted in the turbine casing to Proximitor units installed in a remote junction box or control cabinet.
Centrifugal and axial compressors – Extending signals from probe tips in bearing housings or seals to electronic monitoring racks located several meters away.
Large electric motors and generators – Routing vibration and axial position signals from motor bearing brackets to monitoring systems in control rooms.
Pumps and blowers (critical duty) – Allowing flexible placement of the Proximitor in less hostile environments while probes remain near the rotating shaft.
Keyphasor reference applications – Extending a once-per-turn probe signal to a 3500 series rack or portable analyzer.
Replacement or retrofit – Replacing damaged extension cables in existing 3300 XL or 7200 series monitoring installations without changing probes or Proximitor units.
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All products are purchased directly from overseas original manufacturers or authorized channels, 100% guaranteed genuine quality, sufficient spot inventory, and comprehensive model coverage
Quality Commitment
Each product has been tested by our technicians, providing 12-month long warranty, worry-free after-sales
Flexible procurement plan
- Bulk order enjoys Friendship discount (2 pieces or more can be applied)
- Long-term cooperative customers can apply for priority supply
Full service support
7×24 hours technical consultation, from selection guidance to installation and commissioning to provide full life cycle service (paid)
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On the basis of the same quality, we provide:
- More competitive price system
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