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The 107770-03-03 is an explosion-proof housing assembly pre-installed with a 330500 Velomitor Piezo-velocity Sensor, designed to measure absolute bearing housing, casing, or structural vibration in hazardous areas.
Long-distance transmission capability
It has an impact resistance of up to 5000 g peak value
Perfectly integrates with machine protection architectures such as PowerDCS
This specialized piezoelectric accelerometer incorporates embedded integrated electronics in a solid-state design. Because the assembly 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.
The heavy-duty explosion-proof housing of the 107770-03-03 is constructed from premium corrosion-resistant materials. It delivers exceptional ingress protection to effectively seal out explosive gases, moisture, and dust prevalent in hazardous chemical, petrochemical, and mining environments.
In terms of electrical performance, its advanced internal integration circuitry accurately converts high-frequency acceleration into stable, wide-band velocity signals, fully capturing critical machinery fault signatures such as 1X and 2X running speed frequencies. Furthermore, the low-impedance analog AC voltage output provides superior immunity to electromagnetic interference (EMI) and supports long-distance transmission, enabling seamless and lossless integration into the Bently Nevada 3500 Machinery Protection System or plant-wide DCS/PLC networks to ensure continuous, real-time asset protection.
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 107770-03-03 Velocity Transducer Housing 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.
Oil & Gas
Used to monitor casing vibrations of hazardous wellhead water injection pumps and crude oil export pumps on offshore drilling platforms and oilfields.
Petrochemical & Refining
Used in explosive gas atmospheres to monitor large centrifugal pumps and reciprocating compressor frames within fluid catalytic cracking (FCC) and hydrocracking units.
Thermal Power
Measures the bearing housing vibrations of boiler feedwater pumps, high-pressure FD/ID fans, and coal pulverizers in high-temperature and heavy-dust interference environments.
Coal Chemical
Monitors high-pressure coal slurry pumps, oxygen compressors, and syngas compressors in gasification plants handling hazardous gases like hydrogen and carbon monoxide.
Iron & Steel Industry
Applied in monitoring vibrations of Blast Furnace Top Gas Recovery Turbine (TRT) units, blast furnace blowers, and various exhaust fans in flammable coking areas.
Pharmaceuticals
Provides real-time casing vibration monitoring for reactor agitators and large high-speed centrifuges in hazardous areas involving flammable chemical solvents.
When using this assembly in the field, it must be rigidly tightened to the bearing housing via the 1/2-14 NPT thread and must strictly follow the vertical or horizontal directional requirements to avoid signal attenuation and data distortion caused by improper mounting torque or an excessive tilt angle.
Additionally, the cable outlet must be equipped with explosion-proof flexible conduits or armored sealing glands, and the cable shield must be grounded at a single end to block moisture and electromagnetic interference. Finally, when operating in Zone 1 hazardous areas, it is strictly prohibited to disassemble the housing or disconnect electrical joints while energized, and local safety regulations must be absolutely observed.
This assembly is pre-assembled at the factory, integrating a 330500 piezo-velocity sensor core with a 21128 industrial protective housing. It is primarily utilized for absolute vibration data acquisition on the bearing housings of large rotating machinery, such as steam turbines, industrial pumps, and compressors. During practical data capture and signal transmission, the standard measurement sensitivity of the assembly is precisely controlled at 3.94 mV/mm/s (equivalent to 100 mV/in/s) with an error margin within ±5%. Its effective frequency response range spans from 4.5 Hz to 5 kHz, demonstrating high capture accuracy for common industrial fault frequencies including mechanical unbalance, looseness, misalignment, and early-stage bearing defects. The natural resonant frequency of the assembly exceeds 12 kHz, allowing it to actively avoid high-frequency mechanical noise. Furthermore, when combined with its internal complete shielding and grounding logic, it efficiently suppresses electromagnetic cross-talk between channels.
It is a piezoelectric velocity transducer housing assembly manufactured by Bently Nevada. It integrates a 330500 Velomitor sensor inside and is specially designed for harsh or hazardous industrial environments.
What is the core working principle of 107770-03-03?
It utilizes a solid-state design combining a piezoelectric accelerometer crystal with embedded integration electronics. It directly converts machinery casing vibration velocity into a proportional analog AC voltage signal (typically 3.94 mV/mm/s).
How should the 107770-03-03 transducer assembly be installed?
It should be rigidly mounted (tightened) onto the bearing housing or casing surface of the machinery. Because of its omnidirectional solid-state design, it can be mounted vertically, horizontally, or at any orientation angle.
What types of industrial faults does 107770-03-03 monitor?
It is mainly used to monitor machinery casing vibration caused by imbalance, mechanical looseness, shaft misalignment, and early-stage bearing structural damage.
What is the maximum operating temperature allowed for 107770-03-03?
Its standard operating temperature range is -55°C to 121°C (-67°F to 250°F).
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Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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