Introduction
The Bently Nevada 330190-070-00-00 is a 3300 XL Extended Temperature Range (ETR) Extension Cable configured for applications that require a longer connection between a compatible proximity probe and Proximitor Sensor. With a 7.0 m (22.9 ft) cable length, this standard, non-armored configuration provides additional installation reach while retaining the temperature capability expected from the 3300 XL ETR cable family.
The 330190 series uses PFA-insulated triaxial cable construction and is designed for demanding machinery-monitoring environments where elevated temperatures can exceed the limits of standard extension cables. The 7-meter version is particularly useful when equipment layout, cabinet location, or field routing makes a shorter extension cable impractical.
For maintenance teams, OEMs, and machinery protection specialists, the 330190-070-00-00 provides a practical combination of extended temperature capability, defined electrical characteristics, and long routing distance for compatible 3300 XL proximity monitoring systems.
Technical Specifications
The model number itself identifies the principal configuration: 330190 designates the 3300 XL ETR Extension Cable, 070 specifies the 7.0 m length, 00 indicates the standard cable construction, and the final 00 indicates that no additional agency approval option is specified.
| Specification | 330190-070-00-00 |
|---|
| Manufacturer | Bently Nevada |
| Product Family | 3300 XL |
| Product Type | ETR Extension Cable |
| Model Number | 330190-070-00-00 |
| Cable Length | 7.0 m (22.9 ft) |
| Cable Configuration | Standard, non-armored |
| Cable Construction | 75 Ω triaxial |
| Insulation | PFA |
| ETR Cable Temperature Rating | Up to 260°C (500°F) |
| Typical Cable Capacitance | 69.9 pF/m (21.3 pF/ft) |
| Center-to-Center Resistance | 1.54 Ω ± 0.23 Ω |
| Outer Conductor Resistance | 0.46 Ω ± 0.09 Ω |
| Cable Outside Diameter | Approx. 3.7 mm (0.15 in) maximum |
| Minimum Bend Radius | Approx. 25.4 mm (1.0 in) |
| Connector Type | Miniature coaxial connector |
| Maximum Connector Torque | 0.565 N·m (5 in-lbf) |
| Approx. Cable Weight | 238 g |
| Weight per Meter | Approx. 34 g/m |
| Typical System Use | 3300 XL 8 mm proximity monitoring |
Applications
The 330190-070-00-00 is intended for use in 3300 XL proximity transducer systems, particularly installations where the cable path between the probe and monitoring electronics requires a 7-meter extension.
Common application areas include:
- Steam and gas turbine monitoring
- Compressor vibration monitoring
- Generator and rotating machinery protection
- Pump and motor shaft displacement monitoring
- Bearing and shaft vibration measurement
- Critical machinery condition monitoring
- High-temperature industrial equipment
- Machinery protection systems with remote-mounted monitoring electronics
The 7-meter length can be advantageous when the Proximitor Sensor must be installed farther from the monitored machine or when existing cable-routing infrastructure requires additional reach.
In system planning, the extension cable should not be treated as an isolated component. The probe length and extension cable length must be considered together with the intended Proximitor Sensor system configuration to ensure the complete measurement chain has the appropriate electrical characteristics.
Advantages
Long-range installation flexibility
With 7 meters of extension cable, the 330190-070-00-00 offers considerably more routing flexibility than shorter 3.0 m, 3.5 m, 4.0 m, and 4.5 m configurations. This can simplify installations where monitoring electronics are positioned away from the machinery.
Extended temperature capability
The ETR design is intended for environments where the cable may encounter temperatures beyond the standard extension-cable operating range. PFA insulation supports the high-temperature requirements associated with the 3300 XL ETR system.
Lightweight standard construction
Unlike armored configurations, the -00 cable option uses standard construction, keeping the cable relatively lightweight and easier to route through instrumentation areas where additional mechanical armor is not required.
Controlled electrical characteristics
The 75 Ω triaxial construction and specified capacitance and resistance characteristics help preserve the electrical behavior required by the associated proximity monitoring system.
Suitable for critical machinery monitoring
The cable is designed as part of a dedicated proximity measurement system rather than as a generic instrumentation cable. This makes it a strong fit for applications where reliable shaft-position and vibration measurements are important to machinery protection.
Practical alternative to shorter cable configurations
For installations where a 4.5 m extension does not provide enough routing distance, the 330190-070-00-00 offers a convenient 7-meter configuration without moving to an armored cable design.
Technical FAQs
1. What is the Bently Nevada 330190-070-00-00?
The 330190-070-00-00 is a 3300 XL Extended Temperature Range (ETR) Extension Cable with a 7.0 m length and standard, non-armored construction.
2. How long is the 330190-070-00-00?
The cable length is 7.0 meters (22.9 feet).
3. Is the 330190-070-00-00 armored?
No. The -00 cable option is the standard non-armored configuration. The corresponding armored configuration uses the 330190-070-01-00 ordering designation.
4. What makes this cable an ETR model?
The 330190 series uses PFA-insulated construction and is intended for extended-temperature applications. The ETR extension cable is rated for temperatures up to approximately 260°C (500°F).
5. What type of cable is used in the 330190-070-00-00?
It uses a 75 Ω triaxial cable designed for the electrical requirements of the 3300 XL proximity measurement system.
6. What is the cable capacitance?
The typical extension-cable capacitance is approximately 69.9 pF/m (21.3 pF/ft).
7. What is the DC resistance of the 7-meter cable?
For the 7.0 m configuration, the nominal center-conductor-to-center-conductor resistance is approximately 1.54 Ω ± 0.23 Ω. The outer-conductor resistance is approximately 0.46 Ω ± 0.09 Ω.
8. What is the diameter of the 330190-070-00-00?
The standard cable has a maximum outside diameter of approximately 3.7 mm (0.15 in). Because it is the non-armored version, it has a significantly smaller profile than the armored configuration.
9. How much does the 7-meter cable weigh?
The standard cable weighs approximately 34 g/m, giving an estimated total cable weight of approximately 238 g (0.24 kg) for a 7-meter length.
10. Can the 330190-070-00-00 be used with any 3300 XL proximity probe?
Compatibility should be evaluated as part of the complete transducer system. The probe, extension cable, and Proximitor Sensor must be selected so that the total system length and electrical configuration are appropriate for the intended 3300 XL monitoring application. It is therefore important to verify the exact probe and sensor configuration before replacing an existing cable.
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