Product Overview

The 330101-32-70-05-12-05 is a high-fidelity eddy current sensor from the Bently Nevada 3300 XL series, designed for non-contacting displacement and vibration measurements. By generating a voltage output directly proportional to the gap between the probe tip and a conductive target, this sensor provides precise data on mechanical oscillations and static shaft position. Fully compliant with API 670 standards, it ensures industrial-grade accuracy and thermal stability. The system architecture emphasizes total interchangeability, allowing this probe to be integrated with various 3300 XL extension cables and Proximitor sensors without the need for manual bench calibration or component matching.

Essential Hardware Parameters and Measurement Capabilities

• Model Identification: 330101-32-70-05-12-05

• Probe Diameter: 8 mm

• Thread Specification: 3/8-24 UNF

• Unthreaded Case Length: 3.2 inches

• Total Case Length: 7.0 inches

• Lead Cable Length: 0.5 meters (approx. 20 inches)

• Connector Type: Miniature gold-plated ClickLoc coaxial

• Connector Protection: Includes pre-installed connector protector (Option 12)

• Hazardous Area Certification: CSA, ATEX, and IECEx (Option 05)

• Device Mass: 0.06 kg

• Physical Dimensions: 1.8 x 1.6 x 123 cm

• Manufacturing Origin: USA

Industrial Deployment Scenarios

This 3300 XL probe is a foundational component for Turbine Supervisory Instrumentation (TSI) in high-stakes environments like power plants and petrochemical refineries. It is primarily utilized on fluid-film bearing machines to track radial vibration for detecting rotor imbalance and misalignment. Its DC response capability makes it essential for axial thrust position monitoring, preventing internal contact between rotating and stationary parts. Additionally, the 330101-32-70-05-12-05 serves as an accurate Keyphasor reference for phase analysis and tachometer-based speed measurements. Its rugged design and "Option 12" protector make it ideal for installations where connectors are exposed to moisture, oil, or corrosive vapors.

FAQ

Q: What is the benefit of the "Option 12" connector protector?

A: The -12 suffix indicates that the probe comes with a factory-installed connector protector. This is a crucial accessory for field installations as it seals the coaxial connection point against environmental contaminants like oil and water, which could otherwise cause signal drift.

Q: Is this 3300 XL probe backward compatible with older systems?

A: Yes, this probe is fully compatible and interchangeable with non-XL 3300 series 5 mm and 8 mm transducer components. This allows for seamless maintenance and upgrades of legacy vibration monitoring racks.

Q: Why does this model feature a 3.2-inch unthreaded length?

A: The unthreaded section allows the probe to slide into deep mounting sleeves or housings before the threads engage. This is particularly useful for reaching shafts located behind thick insulation or complex machine casings.

Q: Can this probe be used in explosive or hazardous atmospheres?

A: Absolutely. With the "05" agency approval option, this probe is certified under CSA, ATEX, and IECEx standards for use in intrinsically safe and hazardous locations when installed with the proper barriers.

Q: Does this probe require a target material other than steel?

A: The probe is factory-calibrated for a target made of AISI 4140 steel. While it can detect other conductive metals, the scale factor and linearity may change, necessitating a custom calibration of the Proximitor sensor.