Applications

Competitive Advantage

• Optimized for tight installation spaces where standard proximity probes cannot fit, improving deployment flexibility.
• Suitable for small shaft and limited side-view applications, enabling accurate measurements in compact machinery.
• Compatible with existing 3300 XL NSv Proximitor systems, supporting cost-effective upgrades and reduced retrofit effort.
• Provides reliable performance for multiple measurements including vibration, axial position, speed, and phase reference signals.

System Compatibility, Alternative Models, and Differences

• System Compatibility:
  Fully compatible with the Bently Nevada 3300 XL NSv Proximitor Sensor (such as 330980) and 3300 NSv Extension Cables. It is mechanically and electrically interchangeable with previous Bently Nevada 3300 RAM series proximity probe components.
• Alternative Model (Metric Unit Equivalent):
  330903-00-02-05-02-00 (3300 NSv Proximity Probe, Metric Series)
• Key Differences between 330901-00-10-02-00-02 (English) and 330903-00-02-05-02-00 (Metric):

Thread Style and Size: The English 330901 utilizes standard 1/4-28 UNF-2A mounting threads, whereas the metric 330903 features M8X1 threads.

Case Length Options: The English model uses a 1.0-inch (25.4 mm) overall case length, while the closest standard metric baseline option utilizes a 20 mm (0.79 inch) case length.

Installation Hardware: The 330901 model is supplied with a 7/16-inch lock nut and features 7/32 wrench flats. The 330903 model is supplied with a 13 mm lock nut and features 7 mm wrench flats.

Cable Assembly Length: The 330901 configuration includes a short 0.5-meter (20 inches) integrated cable, whereas the comparison metric model code specifies a longer 1.0-meter (39 inches) baseline length choice.

Ordering Information

Installation & Troubleshooting FAQ

Q1: What is the correct gap voltage and installation procedure for setting up this 3300 NSv probe?

A: For the 3300 XL NSv transducer system, the recommended field gap setting is 1.0 mm (40 mils) from the target surface. This physical positioning corresponds to an initial calibration calibration voltage of approximately -7.0 VDC, which is the midpoint of its 1.5 mm (60 mils) linear range. To set this up, monitor the DC voltage across the Proximitor sensor output terminals while rotating the probe casing, and lock it down once the target voltage is reached.

Q2: Why does this NSv system have a shorter linear range than standard 3300 XL 8mm proximity probes?

A: The 3300 NSv system is specifically optimized for small target parameters and constrained installation restrictions. Its specialized sensor tip design reduces side-view and rear-view metallic coupling effects, limiting its total linear measurement range to 1.5 mm (60 mils) compared to the 2.0 mm (80 mils) range found on standard 3300 XL 8mm units.

Q3: What are the minimum shaft size requirements when executing radial vibration tracking?

A: For a standard X-Y configuration on fluid-filmed bearing housings, the minimum shaft diameter should be at least 30 mm (1.2 inches) to completely prevent electronic cross-talk. If your machinery geometry forces an installation on smaller shafts down to 20 mm (0.8 inches), the X-Y proximity probes must be offset axially from one another by at least 23 mm (0.9 inches).

Q4: What happens if the counterbore diameter surrounding the probe head is too small?

A: If the installation hole counterbore is smaller than 9.5 mm (0.375 inches), the probe's emitted RF electromagnetic field couples prematurely with the surrounding sidewalls. This creates physical signal dampening and alters the system's Average Scale Factor (ASF) at farther gaps, resulting in compromised monitoring accuracy.

Q5: My sensor signal is experiencing noise or drops during heavy oil exposure. How can I fix this?

A: This model is unarmored and uses a standard FEP jacket which features high chemical and oil resistance. However, the connection junction at the miniature coaxial ClickLoc connector remains vulnerable to conductive fluids or heavy turbine oil penetration. To fix this permanently, clean the junction and apply the original Bently Nevada silicone connector protectors or tightly wrap the junction with self-fusing waterproof rubber tape.

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