330190-035-00-00 | Bently Nevada 3.5m ETR Extension Cable

Product Overview of the 330190-035-00-00

In high-temperature turbine monitoring, signal integrity often degrades when cabling cannot withstand extreme heat. The Bently Nevada 330190-035-00-00 solves this challenge as a 3300 XL Extended Temperature Range (ETR) extension cable. Specifically, it connects a 3300 XL Proximitor Sensor to a monitor over a 3.5-meter run. Because the cable uses PFA insulation and a 75 Ω triaxial design, it maintains precise signal transmission where standard cables fail. Consequently, this part is essential for reliable radial vibration and axial position measurements in harsh industrial environments.

Key Specifications and Electrical Performance

The 330190-035-00-00 delivers verified electrical characteristics that ensure accurate data transfer. For instance, the nominal DC resistance from center conductor to center conductor is 0.77 ± 0.12 Ω. Meanwhile, the outer conductor resistance is 0.23 ± 0.05 Ω. Additionally, the cable capacitance is 69.9 pF/m typical. These values guarantee minimal signal loss and precise impedance matching. The ETR cable operates from −52 °C to +260 °C, making it suitable for extreme conditions. Furthermore, the minimum bend radius is 25.4 mm, which prevents mechanical damage during installation.

• Product Type: 3300 XL Extended Temperature Range (ETR) Extension Cable
• Cable Length: 3.5 meters (13.1 feet)
• Center Conductor Resistance: 0.77 ± 0.12 Ω
• Outer Conductor Resistance: 0.23 ± 0.05 Ω
• Capacitance: 69.9 pF/m typical
• Temperature Range: −52 °C to +260 °C
• Minimum Bend Radius: 25.4 mm (1.0 in)
• Connector Material: Gold-plated brass or beryllium copper
• Maximum Connector Torque: 0.565 N·m (5 in·lbf)

Applications and Use Cases

This extension cable is critical in power generation, oil and gas, and heavy manufacturing. For example, steam turbine monitoring requires cables that resist high temperatures. Similarly, gas turbine exhaust sections demand reliable signal paths. Because the 330190-035-00-00 uses ETR construction, it excels in these areas. Moreover, it supports functional safety up to SIL 3 with HFT=1, ensuring dependable operation in safety-critical loops.

Installation and Compatibility

Installing the 330190-035-00-00 requires attention to bend radius and connector torque. Always observe the 25.4 mm minimum bend radius to avoid damage. Additionally, tighten connectors to 0.565 N·m maximum. The cable is electrically and physically interchangeable with non-XL 3300 5 mm and 8 mm components when the bend radius is respected. For field wiring, use 0.2 to 1.5 mm² (16 to 24 AWG) 3-conductor shielded triad cable. The maximum length between the Proximitor Sensor and monitor is 305 meters (1,000 feet).

Maintenance and Reliability

Regular inspection of the cable jacket and connectors ensures long-term reliability. Check for abrasions, kinks, or loose connections. Because the ETR cable withstands up to +260 °C, it resists thermal degradation better than standard cables. However, always follow the manufacturer's safety manual for maintenance. This proactive approach minimizes downtime and extends service life.