Bently Nevada 330750-60-CN High-Temperature Velomitor Vibration Sensor Introduction & Technical Specifications
Product Introduction
Brand: Bently Nevada (Baker Hughes)
Model: 330750-60-CN
Product Name: 330750 Series High-Temperature Separated Velomitor Piezoelectric Velocity Sensor
Origin: United States
HS Code: 8543709090
Detailed Technical Parameters
The overall assembly of the 330750-60-CN is equipped with a 6-meter hardline connecting cable; the main body electronic unit has outer dimensions of 116mm × 32mm × 32mm, the sensing probe head size is 36mm in diameter and 48mm in length, and the overall net weight of the complete set is about 0.953kg. The compact cylindrical structure supports standard threaded fixed installation, which is convenient for mounting on bearing pedestals and equipment shells, and saves limited on-site installation space of industrial equipment.
The rated operating power supply is DC -24V, with the allowable voltage fluctuation range of -22V DC ~ -26V DC, matching the standard power supply specification of Bently Nevada 3500 monitoring rack. The nominal static bias current is 2mA, the output bias voltage is stably maintained at -12V ±2V DC, and the power consumption of the electronic conditioning unit is controlled below 1.2W to realize low-power continuous operation. Built-in anti-surge and overvoltage protection circuits can resist instantaneous power grid voltage impact and protect internal precision circuits from damage.
The fixed nominal sensitivity is 5.7mV/mm/s (145mV/in/s) with tolerance within ±5%. The frequency response range covers 15Hz~2000Hz with ±3dB flatness and 20Hz~1000Hz with ±0.9dB flatness, meeting low-frequency mechanical vibration and high-frequency abnormal vibration capture requirements. The maximum measurable vibration peak velocity reaches 635mm/s below 680Hz, and the maximum acceleration measurement range is 2940m/s² above 680Hz; amplitude linearity is controlled within ±2% under 152mm/s peak vibration, transverse sensitivity is less than 5% of nominal sensitivity, and the broadband noise floor is only 0.127mm/s rms in 15Hz~2kHz frequency band, ensuring high-precision and low-noise signal collection. The maximum supporting transmission cable length is 305 meters without signal attenuation.
In terms of environmental adaptability, the sensing probe head and hardline cable can stably work at -55℃ ~ +400℃, while the signal conditioning electronic unit operates normally within -55℃ ~ +121℃. The sensor can adapt to 10%~100% non-submerged non-condensing humidity environment, with anti-shock capacity up to 24535m/s² peak impact resistance. The whole body adopts 316L stainless steel fully welded hermetic sealing structure, reaching IP67 protection grade, which can resist industrial dust, water splash and weak corrosive gas erosion. The mounted resonant frequency is higher than 5kHz, effectively avoiding resonance interference from equipment operation.
There is no complex external debugging structure on the sensor body; the output analog voltage signal can be directly connected to Bently Nevada 3500 series monitoring modules through shielded cables. The internal circuit has built-in passive filtering function, which automatically filters out high-frequency clutter interference on industrial sites, ensuring stable and consistent output signals for long-term operation.
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