Product Overview
The Bently Nevada 330730-040-01-05 is a 3300 XL 11 mm extension cable designed for demanding industrial environments. This cable connects 3300 XL proximity probes to Proximitor sensors, ensuring accurate vibration monitoring even in harsh conditions. The 330730-040-01-05 features an armored construction with a flexible AISI 302 SST jacket and FEP outer layer, providing excellent mechanical protection and chemical resistance. With a standard length of 4.0 meters (13.1 feet), this cable is suitable for a wide range of machinery monitoring applications.
Technical Specifications
| Parameter |
Value |
| Cable Length |
4.0 m (13.1 ft) |
| Cable Type |
Armored (AISI 302 SST with FEP outer jacket) |
| Agency Approval |
Multiple Approvals (Option 05) |
| Capacitance (typical) |
69.9 pF/m (21.3 pF/ft) |
| DC Resistance (RCORE) |
1.0 ± 0.25 Ω at 4.0 m |
| DC Resistance (RJACKET) |
0.3 ± 0.1 Ω at 4.0 m |
| Operating Temperature |
-51°C to +177°C (-60°F to +351°F) |
| Storage Temperature |
-52°C to +177°C (-62°F to +351°F) |
| Weight (unarmored) |
45 g/m (0.5 oz/ft) – 0.18 kg total |
| Weight (armored) |
140 g/m (1.5 oz/ft) – 0.56 kg total |
| Cable Material |
75 Ω triaxial, FEP insulated |
| System Length |
5 or 9 meters including extension cable |
| Tensile Strength (probe case to lead) |
330 N (75 lb) |
| Tensile Strength (probe to extension connector) |
270 N (60 lb) |
| Connector Material |
Gold-plated brass |
Industry Applications
The Bently Nevada 330730-040-01-05 is engineered for critical rotating machinery such as steam turbines, centrifugal compressors, and large pumps. In these applications, oil leaks and moisture can compromise signal integrity. The optional FluidLoc cable option prevents oil from wicking through the cable interior, a common failure mode in lubrication-rich environments. The connector protector option adds further protection against humidity, extending cable life. This cable reliably transmits probe signals over distances up to 5 or 9 meters, maintaining linear range from 0.5 to 4.5 mm (20 to 180 mils) with an incremental scale factor of 3.94 V/mm (100 mV/mil).
Installation & Setup Guidance
When installing the Bently Nevada 330730-040-01-05, note that silicone tape is provided with each cable and can be used instead of connector protectors. However, do not use silicone tape in applications where the probe-to-extension connection will be exposed to turbine oil, as it may degrade. For best results, use the connector protector option in humid or moist environments. The cable supports field wiring with 0.2 to 1.5 mm² (16-24 AWG) conductors; with ferrules use 0.25 to 0.75 mm² (18-23 AWG). A three-conductor shielded triad cable is recommended, with a maximum length of 305 meters (1,000 ft) between the Proximitor sensor and monitor.
Maintenance & Reliability
To ensure long-term reliability, inspect the connectors periodically for corrosion or damage. The gold-plated brass connectors resist oxidation, but in aggressive environments, connector protectors are strongly recommended. The armored jacket withstands mechanical abuse, while the FEP outer layer provides chemical resistance. The cable's wide temperature range (-51°C to +177°C) ensures stable performance in both cold and hot conditions. Regular checks of cable integrity (e.g., DC resistance values) can help identify early signs of wear. The typical capacitance of 69.9 pF/m remains stable over time, maintaining signal fidelity.
Selection Guide & Purchasing Advice
Before purchasing, verify the required cable length (4.0 m for this model) and the need for armored or non-armored configuration. The 330730-040-01-05 includes armored cable (Option 01) and multiple agency approvals (Option 05). For additional options like FluidLoc or connector protectors, check the full 3300 XL series offering. UBEST Automation (ubest101) stocks genuine Bently Nevada parts, ensuring compatibility and reliability. When ordering, confirm the system length (5 or 9 meters including extension cable) matches your installation distance.