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The 330500-03-02 is a specialized, ATEX-certified Piezo-velocity sensor used to measure absolute bearing housing, casing, and structural vibration in rotating machinery.
Using piezoelectric crystals
Resistant to physical impact
316L stainless steel fully welded seal
Bently Nevada Velomitor Piezo-velocity Sensors are designed to measure absolute (relative to free space) bearing housing, casing, or structural vibration. The 330500 is a specialized piezoelectric accelerometer that incorporates embedded integrated electronics in a solid-state design. Because the 330500 incorporates solid-state electronics and has no moving parts, it does not suffer from mechanical degradation and wear, and can be mounted vertically, horizontally, or at any other angle of orientation.
Building upon this rugged solid-state architecture, the specific 330500-03-02 configuration optimizes field adaptability and regulatory compliance for critical industrial deployments. The -03 option designation equips the transducer with a precision 1/4-28 UNF mounting thread adaptor, facilitating a direct, high-stiffness mechanical coupling to the machine case that ensures unattenuated high-frequency transmission above 12 kHz.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Bently Nevada 330500-03-02 Velomitor Piezo-velocity Sensor Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Thermal Power
Continuous casing vibration monitoring on auxiliary equipment such as boiler feed pumps, forced draft fans, and induced draft fans to detect mechanical loosening.
Wind Power
Main shaft bearing housing vibration tracking and planetary gearbox casing acceleration measurement on megawatt-class wind turbine nacelles.
Petrochemical & Refining
Absolute casing vibration velocity verification on critical centrifugal pumps, cooling tower fans, and electric motor bearings in hazardous process units.
Iron & Steel Metallurgy
Bearing pedestal vibration monitoring on heavy-duty sintering fans, blast furnace blowers, and hot rolling mill main drive motors.
Air Separation Plants
Casing vibration monitoring on high-speed integral-geared centrifugal oxygen compressors and large industrial nitrogen compressor enclosures.
Nuclear Power
Mechanical runout and structural velocity logging on conventional island main condensate pumps and secondary-circuit auxiliary water pumps.
When deploying the Bently Nevada 330500-03-02 Proximitor you must ensure the total combined length of the probe, extension cable, and Proximitor strictly equals exactly 3.0 meters. Field cutting or splicing is strictly prohibited to avoid sensitivity distortion.
All coaxial junctions must be insulated with teflon heat-shrink tubing to prevent contact with metal housings and eliminate ground loops. During static installation the initial probe gap must be calibrated via a voltmeter to the midpoint of the linear range (approximately -10 VDC) to guarantee unclipped and accurate tracking of large-scale thrust or differential expansion movements.
The Bently Nevada 330500-03-02 is a heavy-duty, ATEX-certified piezo-velocity sensor constructed to measure absolute bearing housing, casing, or structural vibration in critical rotating machinery. Utilizing a solid-state piezoelectric accelerometer core with embedded integrated electronics, it converts dynamic case acceleration directly into a high-fidelity analog velocity signal. The sensor provides a standardized sensitivity of 3.94 mV/mm/s (100 mV/in/s) ±5% with a dynamic velocity range up to 1,270 mm/s (50 in/s) peak. Under its specific option configuration, the -03 code denotes a 1/4-28 UNF mounting thread adaptor for high-stiffness mechanical coupling, and the -02 code specifies standard European ATEX hazard area compliance, outputting low-impedance dynamic data to Bently Nevada 3500 Machinery Protection Systems via a 2-pin Mil-C-5015 hermetic connector.
The 330500-03-02 is a heavy-duty, piezoelectric acceleration sensor (commonly utilized as a velocity transducer in industrial frameworks) manufactured by Bently Nevada.
How is the 330500-03-02 used in industrial applications?
This sensor is mounted directly onto the bearing housings of rotating machinery (such as pumps, fans, or compressors) via its threaded stud. It captures the high-frequency case vibration during machine operation and translates these physical movements into continuous electrical signals for monitoring systems.
What is the physical casing material of the 330500-03-02?
The entire outer structural envelope of the 330500-03-02 is manufactured from 316L stainless steel, which provides robust mechanical protection for the internal sensitive piezoelectric crystals against field acids, alkalis, and oil contamination.
What mechanical torque is required when installing the 330500-03-02?
When securing the 1/4-28 mounting stud of the 330500-03-02, a torque wrench must be utilized to strictly maintain a fastening force of 4.5 N·m (40 in·lb), as excessive or insufficient torque will distort the captured signals.
What kind of cable needs to be connected to the 330500-03-02?
The top of the sensor is equipped with a standard 2-pin male connector, which typically requires connection to an official Bently 9571 or 16925 series 2-pin shielded cable to route the signal out to the instrument panel.
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