Bently Nevada 16699-03-05-01 Velomitor Seismic Velocity Transducer Product Specification
The 16699-03-05-01 is a factory pre-calibrated self-powered magnetoelectric velocity transducer belonging to Bently Nevada 16699 classic Velomitor series, designed for continuous absolute casing vibration measurement on bearing pedestals and equipment housings of all types of industrial rotating machinery. The multi-segment part number defines customized product configuration item by item: the first code 03 stands for fixed short-length integral stainless steel armored cable configuration; the second code 05 represents preset internal coil structure and fixed coil impedance parameter for direct matching with standard Bently monitor modules; the final suffix 01 specifies unique housing dimension and mounting thread specification different from 02 version for field installation. Unlike eddy current proximity probes measuring relative shaft vibration gap, this sensor is mounted directly on machine casing and generates alternating voltage proportional to casing vibration velocity without any external excitation power supply. Complying with API 670 machinery protection standard, the transducer is widely applied in thermal power, petrochemical, metallurgy and water treatment industries on fans, feedwater pumps, centrifugal compressors and small auxiliary turbines to monitor abnormal vibration triggered by rotor unbalance, shaft misalignment and progressive bearing wear.
Description
Bently Nevada 16699-03-05-01 Velomitor Seismic Velocity Transducer Product Specification
1. Product Overview
The 16699-03-05-01 is a factory pre-calibrated self-powered magnetoelectric velocity transducer belonging to Bently Nevada 16699 classic Velomitor series, designed for continuous absolute casing vibration measurement on bearing pedestals and equipment housings of all types of industrial rotating machinery. The multi-segment part number defines customized product configuration item by item: the first code 03 stands for fixed short-length integral stainless steel armored cable configuration; the second code 05 represents preset internal coil structure and fixed coil impedance parameter for direct matching with standard Bently monitor modules; the final suffix 01 specifies unique housing dimension and mounting thread specification different from 02 version for field installation. Unlike eddy current proximity probes measuring relative shaft vibration gap, this sensor is mounted directly on machine casing and generates alternating voltage proportional to casing vibration velocity without any external excitation power supply. Complying with API 670 machinery protection standard, the transducer is widely applied in thermal power, petrochemical, metallurgy and water treatment industries on fans, feedwater pumps, centrifugal compressors and small auxiliary turbines to monitor abnormal vibration triggered by rotor unbalance, shaft misalignment and progressive bearing wear.
2. Working Principle and Internal Structure
This transducer adopts fully sealed moving-coil magnetoelectric core construction encapsulated inside robust metal housing. A rigidly fixed high-performance permanent magnet forms stable constant magnetic field inside the enclosed cavity, while suspended induction coil vibrates synchronously with equipment housing to cut magnetic flux lines and output AC analog signal linearly corresponding to vibration velocity. No external auxiliary power or preamplifier is required for normal signal output. Internal empty space of the shell is fully filled with high temperature resistant epoxy resin to block invasion of industrial dust, oil mist and condensed moisture. A precision tuned mechanical damping component is built inside to suppress inherent self-resonance of the transducer itself, ensuring stable linear output within rated working frequency range and long-term stable service under harsh on-site operating conditions.
3. Electrical and Metrological Specifications
Each unit completes full-point sensitivity calibration before factory dispatch following standard Velomitor nominal sensitivity parameters, with measured output expressed in velocity units of inches per second or millimeters per second. Its effective usable frequency response ranges from 4.5 Hz up to 2000 Hz, covering fundamental rotating frequency and major harmonic components of conventional industrial rotating equipment. Internal coil impedance is fixed as defined by code 05, enabling direct wiring compatibility with Bently 3500/42, 3300/44 seismic monitor modules and standalone 1900 series equipment monitors without additional matching adapter circuits. The transducer delivers low-impedance AC output with strong immunity against electromagnetic interference from on-site frequency converters and high-current power cables. Full scale measurement linearity error is controlled within ±3% under standard ambient working condition. Matched backend monitors support automatic open-circuit and short-circuit fault diagnosis for sensor cable breakage or internal coil damage and output corresponding fault alert signals.
4. Cable and Mechanical Mounting Features
The designation 03 corresponds to short fixed-length integral armored cable. The outer layer adopts spiral-wound stainless steel armor to protect inner insulation wires from mechanical pulling, abrasion and sharp cutting during field routing and equipment maintenance, and inner insulation material features excellent oil and high temperature resistance to adapt high heat environment near hot bearing housings. Suffix 01 defines the sensor head outer dimension and dedicated mounting thread size different from 02 variant; the standard threaded structure allows direct screwing onto pre-machined mounting studs on bearing pedestal without extra custom brackets. The entire outer casing is manufactured from anti-corrosion aluminum alloy with surface anti-rust treatment, featuring compact size to fit confined narrow installation space on small pump and fan bases.
5. Environmental Performance Parameters
Permitted continuous operating temperature spans from -35℃ to +85℃; short-duration intermittent peak working temperature can reach +95℃ for temporary high-temperature equipment surroundings. Rated working relative humidity ranges from 5%RH to 98%RH under non-condensing environment, maintaining stable output performance in dusty, oil mist and mild corrosive gas industrial workshops. Storage temperature range for spare inventory is -40℃ ~ +100℃ under dry warehouse conditions. The product has obtained CE EMC certification and passed industrial mechanical shock and vibration endurance test to withstand incidental collision and long-term ambient vibration from adjacent running machinery.
6. System Matching and Application Guidance
The raw alternating velocity signal from 16699-03-05-01 can be directly connected into Bently 3500 rack TSI system, traditional 3300 series monitoring rack and independent 1900 multi-parameter equipment monitors. The backend monitor converts original velocity signal into displacement or acceleration readings via internal mathematical algorithm and supports programmable two-stage Alert pre-alarm and Danger shutdown threshold setup for equipment safety interlock protection. Processed measured data can be transmitted to central DCS and SCADA via monitor’s isolated 4–20mA analog output; meanwhile the original unconditioned sensor signal can be picked up by portable vibration analyzers for offline spectrum collection and periodic predictive maintenance diagnosis. Typical application includes boiler ID/FD fans and feed pumps in power plants, process pumps and compressors in refineries, sintering blowers in metallurgical plants and circulating pumps for municipal water treatment.
7. Factory Inspection and Warranty Provisions
All finished transducers go through full-frequency sensitivity calibration, high-low temperature cyclic aging test and complete hermetic sealing inspection before factory delivery to guarantee consistent product performance across batches. Standard original manufacturer warranty period is twelve months starting from delivery date. Within valid warranty term, free repair or replacement is available for failures caused by original manufacturing defects under specified normal installation and operation conditions. Damages induced by improper cable bending, wrong wiring, mechanical impact extrusion, chemical corrosion and over-temperature abuse are excluded from free warranty coverage.
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