Bently Nevada 16699-11-03-02 Velomitor Seismic Velocity Transducer Full Product Specification
16699-11-03-02 belongs to Bently Nevada classic 16699 series magnetoelectric Velomitor casing vibration transducer under Baker Hughes product portfolio, an original factory pre-calibrated self-generating seismic velocity sensor dedicated to continuous absolute vibration measurement on bearing pedestals and equipment housings of rotating machinery. The four-segment part number defines customized configuration parameters sequentially: the first suffix “11” stands for fixed integrated armored cable length specification; the second suffix “03” corresponds to internal coil impedance and electrical matching design; the third suffix “02” specifies customized external housing structure and mounting thread size for field installation. Unlike eddy current proximity probes measuring shaft relative vibration, this sensor mounts directly onto machine casing and converts mechanical casing vibration velocity into proportional alternating voltage signal without external excitation power supply, widely integrated into TSI machinery protection systems across thermal power, petrochemical, metallurgy and water-treatment industries for fans, centrifugal pumps, blowers and small steam turbines to monitor mechanical faults including rotor unbalance, shaft misalignment and bearing abrasion, fully compliant with API 670 industrial machinery protection standards.
Description
Bently Nevada 16699-11-03-02 Velomitor Seismic Velocity Transducer Full Product Specification
1. Product Overview
16699-11-03-02 belongs to Bently Nevada classic 16699 series magnetoelectric Velomitor casing vibration transducer under Baker Hughes product portfolio, an original factory pre-calibrated self-generating seismic velocity sensor dedicated to continuous absolute vibration measurement on bearing pedestals and equipment housings of rotating machinery. The four-segment part number defines customized configuration parameters sequentially: the first suffix “11” stands for fixed integrated armored cable length specification; the second suffix “03” corresponds to internal coil impedance and electrical matching design; the third suffix “02” specifies customized external housing structure and mounting thread size for field installation. Unlike eddy current proximity probes measuring shaft relative vibration, this sensor mounts directly onto machine casing and converts mechanical casing vibration velocity into proportional alternating voltage signal without external excitation power supply, widely integrated into TSI machinery protection systems across thermal power, petrochemical, metallurgy and water-treatment industries for fans, centrifugal pumps, blowers and small steam turbines to monitor mechanical faults including rotor unbalance, shaft misalignment and bearing abrasion, fully compliant with API 670 industrial machinery protection standards.
2. Working Principle and Internal Construction
The transducer adopts mature moving-coil magnetoelectric internal structure encapsulated inside fully sealed metal shell. A fixed high-performance permanent magnet establishes stable constant magnetic field inside the unit, while the suspended induction coil moves synchronously with casing vibration to cut magnetic field lines and output alternating voltage directly proportional to vibration velocity value, eliminating requirement for external signal conditioning power source. Inner cavity is fully filled with epoxy resin to realize complete sealing against industrial dust, oil mist and condensed moisture, and built-in precision mechanical damping structure restrains inherent resonance interference of the sensor itself, ensuring linear signal output within rated working frequency band. The compact enclosed structure avoids internal component damage from harsh on-site working conditions and extends long-term stable service life.
3. Electrical and Metrology Performance Specifications
Factory pre-calibrated nominal sensitivity follows standard Velomitor specification, with output signal expressed in velocity units of mm/s or in/s. The effective measurable frequency response range covers 4.5Hz to 2000Hz, completely covering fundamental rotating frequency and harmonic vibration frequency of conventional industrial rotating equipment. Internal coil impedance is preset per suffix 03 parameter setting to realize direct impedance matching with Bently 3300/44, 3500/42 seismic monitor modules and 1900 standalone vibration monitors without intermediate matching adapter circuit. Output is low-impedance AC analog signal with strong anti-electromagnetic interference against frequency converter and high-voltage power cable clutter in industrial environment, and measurement linear deviation is controlled within ±3% full scale under nominal working condition after strict factory calibration. Matched backend monitoring modules support open-circuit and short-circuit self-diagnosis for sensor cable and internal coil to trigger fault alert automatically.
4. Cable and Mechanical Mounting Details
Suffix 11 defines the fixed length of integral stainless steel spiral armored outgoing cable. The outer stainless steel armor effectively prevents cable abrasion, tensile damage and sharp object puncture during field wiring and equipment maintenance; inner insulation wire features high-temperature and oil-resistant formulation to adapt high-heat equipment surrounding environment. Suffix 02 determines the external shell dimension and installation thread specification of the sensing head, adopting standard industrial thread structure to realize direct screwing fixation on pre-processed mounting studs of bearing housing without extra auxiliary mounting bracket. The whole transducer shell is manufactured with high-strength corrosion-resistant aluminum alloy via anti-rust surface treatment, compact outline to fit narrow installation space on fan and pump bearing base.
5. Environmental Operating Parameters
Continuous permissible operating ambient temperature spans from -35℃ to +85℃; intermittent short-time working temperature can reach +95℃ to adapt high-temperature bearing shell of auxiliary steam equipment. Applicable working relative humidity ranges from 5% to 98% non-condensing, maintaining stable output performance under environment with floating oil mist, industrial dust and mild corrosive gas. Storage temperature scope is -40℃ to +100℃ for long-term spare part storage under standard warehouse conditions. The product passes CE EMC certification and industrial mechanical shock test to resist incidental vibration impact during equipment running and site maintenance.
6. System Matching and Practical Application
The alternating velocity signal from 16699-11-03-02 can be directly wired to Bently 3500 series rack seismic monitor, 3300 series vibration monitor and independent 1900 series machinery monitor modules. Back-end monitoring unit converts original velocity signal into displacement or acceleration values via internal algorithm and configures two-stage Alert pre-alarm and Danger shutdown threshold for equipment interlock protection. Processed measurement data can be uploaded to central DCS and SCADA system via monitor’s 4-20mA analog output; meanwhile raw sensor signal is available for portable vibration collector access to implement offline spectrum analysis and periodic equipment fault diagnosis. Typical application scenarios include boiler induced draft/forced draft fans and feedwater pumps in thermal power plants, process pumps and compressors in petrochemical refineries, metallurgical sintering exhaust blowers and municipal circulating water pumps.
7. Factory Inspection and Warranty Terms
Every finished transducer undergoes full-frequency sensitivity calibration, high-low temperature cycling aging test and hermetic sealing inspection before factory delivery to unify batch output performance consistency. Standard original manufacturer warranty lasts twelve months starting from product delivery date; free repair or replacement is available for failures caused by inherent manufacturing defects within valid warranty under specified installation and operating environment. Damages arising from artificial cable over-bending, improper wiring, mechanical extrusion impact, chemical erosion and over-temperature misuse are excluded from free warranty coverage.
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