Product Overview
When vibration monitoring accuracy is critical in rotating machinery, the Bently Nevada 330930-040-02-00 3300 NSv Extension Cable delivers reliable signal transmission from the probe to the Proximitor Sensor. This 4.0-meter (13.1-foot) extension cable is part of the 3300 NSv series, designed for use with 3300 XL NSv proximity probes in industrial environments.
The 330930-040-02-00 features a 75 Ω coaxial construction with fluoroethylene propylene (FEP) insulation, providing excellent dielectric properties and thermal resistance. The stainless steel armor option (connector and cable option 02) offers robust mechanical protection without an FEP outer jacket, making it suitable for harsh installations.
Each unit ships from PLC Source PRO with a shipping weight of 1.5 kg and is manufactured in the U.S.A. The agency approval option 00 indicates no additional agency certification is required for this configuration.
Technical Specifications
The following specifications are directly from the manufacturer's data for the 330930-040-02-00:
| Parameter |
Value |
| Cable Length |
4.0 meters (13.1 feet) |
| Connector and Cable Option |
With stainless steel armor, without FEP jacket |
| Agency Approval |
Not Required |
| Extension Cable Material |
75 Ω coaxial, fluoroethylene propylene (FEP) insulated |
| Operating and Storage Temperature |
-51°C to +177°C (-60°F to +351°F) |
| DC Resistance (Center Conductor) |
0.220 Ω/m (0.067 Ω/ft) |
| DC Resistance (Shield) |
0.066 Ω/m (0.020 Ω/ft) |
| Capacitance |
69.9 pF/m (21.3 pF/ft) typical |
| Field Wiring |
0.2 to 1.5 mm² (16 to 24 AWG); 0.25 to 0.75 mm² (18 to 23 AWG) with ferrules |
| Maximum Field Wiring Length |
305 meters (1,000 feet) between sensor and monitor |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm (10 to 70 mils) |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Extension Cable Armor (Optional) |
Flexible AISI 302 SST with/without FEP outer jacket |
| Tensile Strength (Maximum Rated) |
220 N (50 lb) at probe case, probe lead, and connectors |
| Connector Material |
Gold-plated brass |
| Shipping Weight |
1.5 kg |
Performance and Compatibility
The 330930-040-02-00 is engineered to work seamlessly with 3300 XL NSv Proximitor Sensors and compatible monitors. The combination of low DC resistance and controlled capacitance ensures minimal signal attenuation over the cable length, preserving measurement integrity.
The linear range of 1.5 mm (60 mils) with a recommended gap setting of 1.0 mm (40 mils) provides consistent, repeatable displacement measurements. The cable's operating temperature range of -51°C to +177°C (-60°F to +351°F) allows deployment in extreme thermal environments, from cold outdoor installations to high-heat machinery areas.
For system integration, the maximum field wiring length of 305 meters (1,000 feet) gives flexibility in placing the Proximitor Sensor relative to the monitoring system, while the recommended three-conductor shielded triad cable ensures noise immunity.
Installation and Setup Guidance
Proper installation is essential for accurate vibration monitoring. When installing the 330930-040-02-00, verify that the total length of the extension cable plus the probe length equals the Proximitor Sensor total length. This ensures correct system operation and calibration.
Route the cable away from high-voltage lines and avoid sharp bends that could damage the stainless steel armor. Secure the cable with appropriate clamps to prevent movement or vibration-induced wear. When connecting the cable, ensure the gold-plated brass connectors are clean and fully seated to maintain low resistance and signal integrity.
For field wiring, use a three-conductor shielded triad cable with conductor sizes between 0.2 and 1.5 mm² (16 to 24 AWG). If using ferrules, the conductor size should be 0.25 to 0.75 mm² (18 to 23 AWG). Keep the total wiring distance between the Proximitor Sensor and the monitor within 305 meters (1,000 feet) to avoid signal rolloff at high frequencies.
Maintenance and Reliability
The 330930-040-02-00 is built for long service life, but periodic inspection is recommended. Check the armor for dents or cuts that could expose the inner conductor. Verify connector tightness and look for signs of corrosion, especially in humid or chemical-laden environments.
Operating temperatures within the specified range (-51°C to +177°C) will not degrade the FEP insulation, but avoid exceeding these limits to prevent material breakdown. The tensile strength rating of 220 N (50 lb) at all connection points means the cable can withstand moderate pulling forces, but do not subject it to constant tension or sharp impacts.
Routine maintenance of the entire monitoring system, including the probe and Proximitor Sensor, will extend the life of the extension cable and ensure reliable measurements.
Selection Guide and Purchasing Advice
When ordering a replacement or spare extension cable, confirm the exact part number 330930-040-02-00 and verify the cable length (4.0 meters) and connector option (stainless steel armor, no FEP jacket) meet your system requirements. Also, ensure the agency approval option (00 – not required) is acceptable for your facility's compliance needs.
For bulk orders or custom configurations, contact PLC Source PRO to discuss availability and lead times. As a trusted supplier of industrial automation parts, PLC Source PRO ensures genuine Bently Nevada components and prompt shipping.