The Bently Nevada 330191-00-33-90-05 3300 XL 8 mm ETR Probe is a high-performance proximity probe designed for precise measurement of shaft vibration and displacement in critical rotating equipment. As part of the 3300 XL series, it delivers exceptional linearity, stability, and noise immunity, even over long cable lengths. With an 8 mm tip diameter and an extended total length of 9.0 meters, this probe is ideal for applications requiring longer probe-to-monitor distances without compromising signal quality. Its rugged stainless-steel construction and advanced insulation materials allow reliable operation in demanding industrial environments such as power generation, petrochemical processing, and heavy manufacturing.

Product Specifications

Applications

The 330191-00-33-90-05 probe is tailored for accurate non-contact vibration and displacement monitoring in:

• Steam and Gas Turbines – Continuous shaft vibration measurement for predictive maintenance and trip protection.

• Compressors and Pumps – Detection of misalignment and mechanical looseness in real time.

• Generators and Large Motors – Monitoring of rotor position and dynamic behavior.

• Petrochemical Equipment – Reliable operation in explosive or corrosive atmospheres.

• Heavy Industrial Machinery – Long-term condition monitoring for critical production assets.

Advantages

• Extended Cable Length – 9.0 m design supports flexible installation and remote monitoring.

• Wide Measurement Range – 8 mm tip offers increased linear range for larger shaft displacements.

• Excellent Signal Integrity – Maintains high sensitivity and low noise even with long cable runs.

• Durable Construction – Stainless steel probe body and PEEK insulation provide corrosion resistance.

• Broad Temperature Tolerance – Reliable operation from –35 °C to +177 °C.

• Seamless Integration – Fully compatible with Bently Nevada 3300 XL Proximitor sensors and 3500 monitoring systems.

• High Environmental Protection – Rated for pressures up to 10 bar and resistant to dust and moisture ingress.

• Ease of Installation – Standard mounting thread simplifies both retrofit and new equipment installations.

FAQ

1. What is the nominal linear range of this probe?

   It provides a linear range of approximately 2.0 mm (80 mils) for precise shaft displacement measurement.

2. How is signal integrity maintained over the 9 m cable length?

   The probe uses low-noise coaxial construction and matched impedance to prevent signal degradation.

3. Is the probe compatible with 3300 XL Proximitor sensors?

   Yes, it is fully compatible and requires no additional adapters.

4. What is the typical sensitivity rating?

   The probe maintains a sensitivity of about 7.87 V/mm (200 mV/mil) across its entire operating range.

5. Can it handle high-frequency vibration monitoring?

   Yes, it supports a frequency response from DC to 10 kHz for accurate detection of high-speed events.

6. What mounting thread specification is recommended?

   A 3/8–24 UNF thread or equivalent housing is recommended for secure installation.

7. Is additional shielding needed in areas with strong EMI?

   No extra shielding is usually required thanks to its built-in coaxial shielding.

8. Can it operate in pressurized environments?

   Yes, it is rated to withstand up to 10 bar when installed correctly.

9. How does temperature variation affect performance?

   The probe is factory-calibrated to maintain sensitivity and accuracy from –35 °C to +177 °C.

10. Is it suitable for hazardous area installations?

    When paired with appropriately certified Proximitor systems, it meets requirements for many classified zones.