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SKU: 330500-0300

Bently Nevada 330500-03-00 Velomitor Piezo Velocity Sensor

The Bently Nevada 330500-03-00 is a piezo-velocity Velomitor sensor with a 3/8-24 UNF thread. It provides high-accuracy casing vibration measurements for critical and general-purpose industrial machinery.

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Technical Specification Overview

The Bently Nevada 330500-03-00 functions as a specialized piezo-velocity transducer designed to measure absolute casing vibration on rotating machinery. Unlike standard accelerometers, this Velomitor sensor incorporates internal electronics that integrate the raw acceleration signal into a velocity output. By providing a direct velocity measurement, the 330500-03-00 enables the 3500 Monitoring System to track mechanical health more effectively, particularly for detecting faults like structural resonance or bearing housing instability.

Design and Functional Capabilities

Engineers designed the 330500 series with a solid-state piezo-electric sensing element that lacks moving parts, which eliminates the wear and tear associated with traditional moving-coil velocity transducers. This specific configuration features a 3/8-24 UNF mounting thread and a standard 2-pin MIL-C-5015 connector. Furthermore, the 330500-03-00 maintains a wide frequency response range, ensuring that it captures both the fundamental rotational frequencies and higher-frequency mechanical harmonics with high fidelity.

  • Brand: Bently Nevada
  • Model Number: 330500-03-00
  • Sensor Type: Velomitor Piezo-velocity
  • Scale Factor: 3.94 mV/mm/s (100 mV/in/s) ±5%
  • Frequency Response: 4.5 Hz to 5 kHz 
  • Mounting Thread: 3/8-24 UNF
  • Agency Approval: Standard
  • Connector Type: 2-pin MIL-C-5015 top exit
  • Casing Material: 316L Stainless Steel
  • Operating Temperature: -55°C to +121°C

Operational Impact and Applications

This vibration sensor actively supports predictive maintenance strategies by delivering a clean signal that is proportional to the severity of mechanical stress. Consequently, operators can monitor vibration levels on machine casings where internal shaft probes cannot be installed. By detecting increased velocity levels, the 330500-03-00 helps identify developing issues such as rotor imbalance, pump cavitation, or piping strain before they cause significant structural damage.

Primary industrial applications include:

  • General Machinery Monitoring: Tracking casing vibration on small pumps, motors, and blowers.
  • Balance-of-Plant Equipment: Providing cost-effective protection for non-critical auxiliary assets.
  • Rolling Element Bearings: Detecting mid-range frequency energy associated with bearing housing vibration.

Mechanical Integrity and Environmental Protection

To ensure survival in harsh industrial atmospheres, Bently Nevada utilizes a 316L stainless steel housing that is hermetically sealed to prevent the ingress of moisture and process fluids. The 330500-03-00 effectively rejects electromagnetic interference (EMI) through its shielded internal design, ensuring signal purity even when mounted near high-voltage motors. Additionally, the rugged MIL-spec connector interface provides a secure, vibration-resistant connection for field cabling, ensuring long-term reliability in high-vibration environments.

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Technical Overview

The Bently Nevada 31000-16-10-15-030-03-02 is a specialized proximity probe housing designed to physically protect a proximity probe and its integral cable within harsh industrial environments. Its primary function is to provide a secure, environmentally sealed mounting point on rotating machinery for acquiring critical vibration and position data. The housing is constructed from 304 Stainless Steel, offering robust protection against physical impact and corrosion. This specific configuration, 31000-16-10-15-030-03-02, features a 3/4-14 NPT external mounting thread for direct installation into a machine case. Internally, it accommodates a Bently Nevada 3300 XL 8 mm or 3300 5 mm probe, which is positioned by a 1.0-inch stinger (probe sleeve). The housing facilitates the signal path from the probe tip to the Bently Nevada 3500 Monitoring System. The probe, connected via an extension cable to a Proximitor Sensor, generates a high-frequency RF signal. The resulting eddy current field is used to measure the distance to the observed conductive target. The Proximitor Sensor conditions this signal into a calibrated DC voltage proportional to the gap, which is then transmitted to a 3500/42M Proximitor/Seismic Monitor module for analysis, alarming, and machinery protection.

Detailed Specifications

ParameterSpecification
ManufacturerBently Nevada
Part Number31000-16-10-15-030-03-02
Product Type31000 Proximity Probe Housing
ConditionBrand New
Warranty12 Months
Housing Material304 Stainless Steel
Mounting Thread3/4-14 NPT
Stinger (Probe Sleeve) Length1.0 inch (25.4 mm)
Probe CompatibilityBently Nevada 3300 XL 8 mm and 3300 5 mm Proximity Probes
Environmental SealingViton O-ring cable seal included
Operating Temperature Range-34 °C to +177 °C (-30 °F to +350 °F)
Hazardous Area SuitabilitySuitable for Class I, Div 2 / Zone 2 locations when installed per Bently Nevada control drawings and with appropriately certified system components.

Operational Capabilities

In Oil & Gas applications, the 31000-16-10-15-030-03-02 housing provides essential protection for transducers monitoring centrifugal and reciprocating compressors, pumps, and gearboxes. Its 304 Stainless Steel construction and Viton seals ensure long-term integrity in environments containing corrosive elements such as H2S and hydrocarbons, a critical requirement for meeting API 670 standards for machinery protection systems. In Power Generation, this housing is extensively used on steam and gas turbines, exciters, and boiler feed pumps. It maintains measurement accuracy and reliability under conditions of high temperature and vibration, which is fundamental for monitoring shaft radial vibration, axial thrust position, and differential expansion. The passive mechanical design results in a high Mean Time Between Failures (MTBF), contributing to overall plant availability. When properly installed, the housing assembly provides an environmental rating equivalent to NEMA 4X and IP65, preventing ingress of dust, moisture, and process contaminants that could otherwise compromise signal integrity

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Technical Overview

The Bently Nevada 330102-00-60-10-01-05 is an 8 mm reverse-mount eddy current proximity probe designed for non-contact measurement of vibration and displacement. It functions as a core component of the 3300 XL 8 mm Proximity Transducer System, which also includes an extension cable and a Proximitor Sensor. The probe operates by having the Proximitor Sensor generate a high-frequency radio frequency (RF) signal, which is transmitted through the extension cable and radiated from the probe's tip into a small 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 amplitude. This change is directly proportional to the gap between the probe tip and the target surface. The Proximitor Sensor demodulates this signal, converting it into a DC voltage that accurately represents the physical distance. This conditioned voltage signal is then transmitted to a monitoring system, such as the Bently Nevada 3500, for real-time analysis of radial vibration, axial position, and shaft speed.

Detailed Specifications

ParameterSpecification
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Part Number330102-00-60-10-01-05
Product Type3300 XL 8 mm Reverse Mount Proximity Probe
ConditionBrand New
Warranty12 Months
Total Length1.0 meter (3.3 feet)
Case Length6.0 inches (152 mm)
Mounting OptionReverse Mount
Connector TypeMiniature coaxial ClickLocâ„¢ connector, gold-plated
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Probe Case MaterialAISI 304 Stainless Steel
Agency ApprovalsMultiple Approvals: CSA (Class I, Div 1/2), ATEX/IECEx (Zone 0/1)

Operational Capabilities

In Oil & Gas and Power Generation applications, the 330102-00-60-10-01-05 probe demonstrates high reliability in demanding operational environments. Its construction with a PPS tip and stainless steel case allows for continuous operation in temperatures ranging from -34 °C to +177 °C (-29 °F to +350 °F). The gold-plated ClickLoc connector provides a secure, corrosion-resistant connection that prevents signal degradation from fluid ingress or vibration-induced intermittence. When paired with a 3300 XL Proximitor Sensor, the system provides a linear measurement range of 2.0 mm (80 mils) with a scale factor of 7.87 V/mm (200 mV/mil), ensuring precise data for machine diagnostics. The system is designed for high immunity to radio frequency interference (RFI), minimizing signal corruption in electrically noisy industrial environments. The probe's physical durability and signal integrity are critical for monitoring high-speed turbomachinery, where accurate measurement of shaft dynamics is essential for preventing catastrophic failure.

Applications

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

Technical FAQ

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A: The 330102-00-60-10-01-05 probe is a component of the 3300 XL 8 mm Transducer System. For proper operation, it must be used with a 3300 XL extension cable and a 3300 XL Proximitor Sensor (e.g., part number 330180). This complete transducer system is fully compatible with Bently Nevada monitoring systems, including the 3500 Series Machinery Protection System and ADRE Sxp/408 DSPi data acquisition systems. It is not electrically or mechanically compatible with components from other transducer series, such as the 7200 or 3000 series.

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