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SKU: 330103-00-04-50-11-00

Bently Nevada 330103-00-04-50-11-00 3300 XL 8mm Proximity Probe

The Bently Nevada 330103-00-04-50-11-00 is a 3300 XL 8mm proximity probe featuring a 0.4-inch case and an integrated 5.0-meter cable. It provides high-accuracy, non-contact vibration monitoring for critical rotating machinery, rated for extreme temperatures up to +177°C.

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High-Performance Machinery Protection and Diagnostics

The Bently Nevada 330103-00-04-50-11-00 drives superior asset protection by delivering precise, non-contact vibration and position data. This 3300 XL series eddy current sensor tracks microscopic shaft movements, enabling the 3500 Monitoring System to detect early mechanical faults such as unbalance, misalignment, and bearing instability. By utilizing a high-frequency electromagnetic field, the probe ensures consistent signal accuracy without mechanical wear. This reliability empowers predictive maintenance (PdM) teams to monitor critical rotating assets—including steam turbines and high-speed compressors—with absolute confidence in data integrity.

Critical Technical Specifications

  • Brand: Bently Nevada
  • Model Number: 330103-00-04-50-11-00
  • Product Series: 3300 XL 8mm Transducer System
  • Thread Type: 3/8-24 UNF English Thread
  • Unthreaded Length: 0.0 inches
  • Overall Case Length: 0.4 inches
  • Total Cable Length: 5.0 meters
  • Connector Option: Miniature coaxial ClickLoc connector, standard cable
  • Agency Approval: No hazardous area approvals
  • Linear Range: 2.0 mm (80 mils)
  • Operating Temperature: -51°C to +177°C

Operational Advantages and Asset Health

The 330103-00-04-50-11-00 maximizes machinery uptime by providing high-fidelity signal resolution in extreme industrial environments. The probe tip features a polyphenylene sulfide (PPS) construction that successfully resists chemical corrosion and moisture ingress, ensuring long-term durability. Furthermore, the 5.0-meter integrated cable length eliminates the need for an intermediate extension cable in many mounting configurations, which effectively reduces the number of connection points and minimizes the risk of signal grounding. This streamlined setup is ideal for:

  • Radial vibration monitoring on fluid-film bearing machines
  • Axial thrust position tracking in high-pressure pumps
  • Shaft eccentricity and thermal expansion diagnostics
  • Real-time speed sensing and Keyphasor phase reference

Installation and System Integration

Maintenance technicians utilize the 3/8-24 UNF threads to install the 330103-00-04-50-11-00 directly into machine bearing housings or brackets. For a standard 5.0-meter system, this probe connects directly to a 3300 XL Proximitor Sensor without an additional extension cable, maintaining a calibrated 7.87 V/mm (200 mV/mil) scale factor. The “ClickLoc” connector (11 option) provides a gold-plated, finger-tight locking mechanism that prevents signal interruption due to machine vibration. This robust electrical connection ensures that the 3500 rack receives a clean, noise-free data stream for advanced rotor dynamics analysis and automated emergency trip logic.

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21504-00-32-10-02 | Bently Nevada | Vibration Probe

21504-00-32-10-02 | Bently Nevada | Vibration Probe

Technical Overview

The Bently Nevada 21504-00-32-10-02 is a 3300 NSv series proximity vibration probe, a fundamental component of an eddy current transducer system designed for non-contact displacement and vibration measurement on rotating machinery. Its primary function is to measure the distance (gap) between the probe tip and a conductive target material, typically a machine shaft. The probe operates by generating a high-frequency radio frequency (RF) field from its tip coil. When brought near the conductive target, this field induces eddy currents on the target's surface. These eddy currents alter the impedance of the probe's coil system. This change in impedance is detected by an associated Proximitor Sensor, which demodulates the signal into a voltage directly proportional to the probe-to-target gap. This analog voltage signal is then transmitted to a monitoring system, such as the Bently Nevada 3500 Machinery Protection System, for real-time analysis, trending, and alarming. The 21504-00-32-10-02 is constructed with a stainless steel case for durability in industrial environments and is specifically configured with a 320 mm case length and a 1.0-meter integral cable.

Detailed Specifications

ParameterSpecification
ManufacturerBently Nevada
Part Number21504-00-32-10-02
Product Type3300 NSv Proximity Vibration Probe
ConditionBrand New
Warranty12 Months
Unthreaded Length0 mm
Case Length320 mm (12.6 in)
Total Length1.0 metre (3.3 feet)
Connector TypeMiniature coaxial ClickLoc connector, standard cable
Probe Tip MaterialPolyphenylene Sulfide (PPS)
Case MaterialAISI 304 Stainless Steel
System Linear Range2 mm (80 mils)
System Scale Factor7.87 V/mm (200 mV/mil) with 3300 NSv Proximitor

Operational Capabilities

In Oil & Gas and Power Generation applications, the 21504-00-32-10-02 probe demonstrates high reliability for continuous monitoring of critical assets such as gas and steam turbines, compressors, and large pump motors. Its non-contacting measurement principle eliminates mechanical wear, contributing to a high Mean Time Between Failures (MTBF) for the overall protection system. The probe is engineered to operate reliably in harsh industrial conditions. The probe tip is rated for continuous operation from -34 °C to +177 °C (-29 °F to +351 °F). The robust stainless steel case provides protection against physical impact and contaminants common in plant environments. When installed as part of a complete 3300 NSv transducer system, it provides a stable and repeatable measurement essential for machine protection and condition monitoring programs, enabling early detection of developing faults like imbalance, misalignment, and fluid-induced instabilities.

Applications

  • Power generation turbines and generators
  • Oil & gas compressors and pumps
  • Industrial rotating machinery monitoring
  • Predictive maintenance systems
  • Process automation

Technical FAQ

Q: What systems is the 21504-00-32-10-02 compatible with?
A: The 21504-00-32-10-02 probe is a component of the Bently Nevada 3300 NSv Proximity Transducer System. For correct operation, it must be used in conjunction with a 3300 NSv extension cable and a 3300 NSv Proximitor Sensor. The output from the Proximitor Sensor is compatible with Bently Nevada monitoring systems, including the 3500 and 3300 series, as well as any data acquisition system, PLC, or DCS capable of accepting a -24 Vdc powered, 7.87 V/mm (200 mV/mil) analog signal.

Q: What are the installation requirements?
A: Proper installation is critical for measurement accuracy. The probe must be mounted perpendicular to the target surface using a rigid bracket. The physical gap should be set to place the DC output voltage in the middle of the system's linear range, typically -10 Vdc. The target area on the shaft must be at least 10.7 mm (0.42 in) in diameter, smooth (0.4 to 0.8 µm / 16 to 32 µin rms), and free of any electrical or magnetic irregularities (e.g., chrome plating, magnetised spots). Cable routing must avoid high-voltage power lines and other sources of electromagnetic interference. All ClickLoc connectors must be fully engaged to ensure a secure connection.

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330703-00-100-10-11-CN | Bently Nevada | 3300 XL 11 mm Proximity Probes

330703-00-100-10-11-CN | Bently Nevada | 3300 XL 11 mm Proximity Probes

Technical Overview

The Bently Nevada 330703-00-100-10-11-CN is an 11 mm eddy current proximity probe designed for non-contact displacement and vibration measurement on rotating machinery. It functions as a core component of the 3300 XL 11 mm Transducer System, which also includes a matched extension cable and a 3300 XL 11 mm Proximitor Sensor. The system operates on the eddy current principle, where the Proximitor Sensor emits a high-frequency radio frequency (RF) signal through the probe and extension cable. This signal radiates from the probe tip, creating an electromagnetic field. When a conductive target, such as a machine shaft, enters this field, eddy currents are induced on its surface. These currents create a secondary magnetic field that opposes the primary field, causing a measurable change in the RF signal's impedance. The Proximitor Sensor demodulates this signal to produce a DC voltage directly proportional to the gap between the probe tip and the target surface. This analog voltage signal is then transmitted to a monitoring system, such as the Bently Nevada 3500 series, for real-time analysis of radial vibration, axial position, and shaft speed. The 330703-00-100-10-11-CN features a robust stainless steel case and a chemically resistant Polyphenylene Sulfide (PPS) tip, ensuring reliability in harsh industrial environments.

Detailed Specifications

ParameterSpecification
ManufacturerBently Nevada
Part Number330703-00-100-10-11-CN
Product Type3300 XL 11 mm Proximity Probe
ConditionBrand New
Warranty12 Months
Linear Range4.0 mm (160 mils)
Scale Factor2.00 mV/µm (50 mV/mil) ± 6.5%
Total Length1.0 metre
Probe Tip MaterialPolyphenylene Sulfide (PPS)
Probe Case MaterialAISI 304 Stainless Steel
Connector TypeMiniature coaxial ClickLocâ„¢ connector, gold-plated
Agency ApprovalCN Ex (China Ex) for hazardous area installations

Operational Capabilities

The 330703-00-100-10-11-CN proximity probe is engineered for high reliability in demanding industrial applications, particularly within Oil & Gas and Power Generation sectors. Its 11 mm tip provides a larger linear measurement range and is well-suited for monitoring large shaft diameters or applications requiring a greater standoff distance. The probe's construction ensures operational integrity across a wide temperature range, with the probe tip rated for -51 °C to +177 °C (-60 °F to +351 °F). The 3300 XL system design provides enhanced immunity to radio frequency interference (RFI/EMI), minimizing the risk of signal corruption from nearby motors, generators, or radio sources. The gold-plated ClickLoc™ connector ensures a secure, corrosion-resistant connection that prevents intermittent signals caused by vibration. When installed and maintained according to manufacturer specifications, the system demonstrates high Mean Time Between Failures (MTBF) and is a critical component for machinery protection systems (MPS) and condition monitoring programs, compliant with standards such as API 670.

Applications

  • Steam and gas turbines for power generation
  • Large centrifugal and reciprocating compressors in oil & gas processing
  • Boiler feed water pumps and other critical pump applications
  • Large electric motors and generators
  • Gearboxes and other industrial rotating machinery with fluid-film bearings
  • Integration into predictive maintenance and machinery protection systems (MPS)
  • Axial (thrust) position and radial vibration monitoring

Technical FAQ

Q: What systems is the 330703-00-100-10-11-CN compatible with?
A: The 330703-00-100-10-11-CN probe must be used as part of a complete Bently Nevada 3300 XL 11 mm Transducer System. This requires a matching 3300 XL 11 mm Proximitor Sensor (e.g., part number 330780) and a 3300 XL 11 mm extension cable. It is not interchangeable with components from 5 mm or 8 mm transducer systems, as the scale factor and linear range are different. The complete transducer system provides a voltage output compatible with Bently Nevada monitoring systems, including the 3500 and 3300 series, as well as third-party PLCs, DCS, and data acquisition systems designed to accept a 3-wire, -24 Vdc powered eddy current probe input.

Q: What are the installation requirements?
A: Proper installation is critical for accurate measurements. The probe must be mounted perpendicular to the observed shaft surface using a rigid bracket. The target area on the shaft must be smooth (typically 0.4 to 0.8 µm / 16 to 32 µin Ra), free of chrome or other non-conductive plating, and clear of any residual magnetism or electrical runout. The probe must be gapped correctly by adjusting its distance to the shaft until the Proximitor Sensor output voltage is at the center of the linear range, typically -10.0 Vdc. The probe case locknut should be torqued to the specified value to prevent loosening. The integral cable and any extension cable should be secured to avoid strain on the connectors and routed away from high-voltage power cables to minimize interference.

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