Product Overview
The Bently Nevada 330930-040-02-CN is a 3300 NSv Extension Cable engineered for precision vibration monitoring systems. This cable connects a proximity probe to the Proximitor® Sensor, ensuring accurate signal transmission in demanding industrial environments. With a 4.0-meter length (13.1 feet), it fits standard installations and maintains the critical total length requirement for the sensor system.
Manufactured in the U.S.A., the 330930-040-02-CN features 75 Ω coaxial construction with fluoroethylene propylene (FEP) insulation, delivering stable electrical performance across a wide temperature range. The stainless steel armor option (without FEP jacket) provides robust mechanical protection, making it suitable for harsh machinery applications.
Technical Specifications
The table below summarizes the key parameters of the Bently Nevada 330930-040-02-CN extension cable. These values are critical for ensuring correct system integration and reliable operation.
| Parameter |
Value |
| Product Type |
3300 NSv Extension Cable |
| Length Option |
4.0 meters (13.1 feet) |
| Connector/Cable Option |
With stainless steel armor, without FEP jacket |
| Agency Approval Option |
CN – country specific approvals |
| Cable Material |
75 Ω coaxial, FEP insulated |
| Operating/Storage Temperature |
-51°C to +177°C (-60°F to +351°F) |
| DC Resistance (Center) |
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 (16-24 AWG), with ferrules 0.25-0.75 mm² (18-23 AWG) |
| Maximum Field Wiring Length |
305 meters (1,000 feet) |
| Linear Range |
1.5 mm (60 mils), from 0.25 to 1.75 mm (10-70 mils) |
| Recommended Gap Setting |
1.0 mm (40 mils) |
| Tensile Strength (max) |
220 N (50 lb) at all connection points |
| Connector Material |
Gold-plated brass |
| Shipping Weight |
1.5 kg |
Industry Applications
The 330930-040-02-CN is widely used in rotating machinery monitoring, including turbines, compressors, pumps, and motors. In a typical installation, it connects a 3300 XL 8 mm probe to the Proximitor sensor, enabling continuous vibration and position measurement. For example, in a steam turbine train, this cable ensures accurate shaft vibration data, allowing early detection of imbalance or misalignment. Its robust armor suits high-vibration environments, while the CN approval option supports global deployments where country-specific certifications are required.
Installation & Setup Guidance
When installing the 330930-040-02-CN, verify that the combined length of the extension cable and probe equals the Proximitor sensor's total specified length. This ensures correct calibration and linear output. Route the cable away from high-voltage lines and sharp edges to prevent damage. For field wiring, use a three-conductor shielded triad cable with a maximum length of 305 meters (1,000 feet) between the sensor and monitor. Maintain the recommended gap of 1.0 mm (40 mils) between the probe tip and target surface for optimal linear range.
Maintenance & Reliability
Regularly inspect the extension cable for abrasion, cuts, or connector loosening, especially in high-vibration areas. The FEP insulation and stainless steel armor provide excellent resistance to chemicals and mechanical stress, but periodic checks are recommended. Operating temperatures range from -51°C to +177°C, so verify that the environment stays within these limits. Keeping connectors clean and properly torqued prevents signal degradation and extends service life, reducing unplanned downtime.
Selection Guide & Purchasing Advice
Before purchasing the 330930-040-02-CN, confirm the required cable length and connector options for your specific probe and Proximitor model. Ensure the CN approval option matches your installation country's regulations. PLC Source PRO offers genuine Bently Nevada parts with reliable worldwide shipping. For technical support or to verify compatibility, contact our team—we are ready to assist with your vibration monitoring needs.