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The Bently Nevada Velomitor Piezo-Velocity Sensors are designed to measure absolute (relative to free space) vibration on bearing housings, casings, or structures. The 330500 model is a specialized piezoelectric accelerometer that integrates embedded electronics in a solid-state design.

Since the 330500 includes solid-state electronics and contains no moving parts, it avoids the mechanical degradation and wear that can affect other sensors. Additionally, this sensor can be mounted vertically, horizontally, or at any other angle of orientation.

Frequently Asked Questions

Q : What is the core operating principle of the 330500 Velomitor?

A: It contains internal piezoelectric crystals integrated with a solid-state electronic charge amplifier. The crystals sense acceleration, and the internal circuitry automatically integrates it into a velocity signal output.

Q : What is the standard sensitivity of the 330500?

A: The nominal sensitivity is 3.94 mV/mm/s (100 mV/in/s) with a tolerance within ±5%.

Q : What is the maximum vibration measurement range (amplitude limit)?

A: The peak velocity measurement range goes up to 127 mm/s (50 in/s PK).

Q : What is the frequency response range of this sensor?

A: The standard frequency response is 4.5 Hz to 5,000 Hz (±3 dB), which perfectly covers the vibration frequencies of most industrial rotating machinery.

Product Applications

Power plants (thermal, hydropower, wind power, nuclear power): Used to monitor the vibration of large steam turbines, gas turbines, generator bearing housings, and feedwater pump casings.

Oil and gas, petrochemical plants: Used to monitor compressors, large pump sets, and fans in high-risk environments.

Steel and metallurgical plants: Used to monitor severe vibrations in rolling mill drive systems, large blowers, and blast furnace auxiliary rotating equipment.

Cement plants and mines: Used to monitor equipment in harsh, dusty environments such as crushers, large ball mills, and conveyor drive gearboxes.

Paper mills and water treatment plants: Used to monitor pulping machines, dryer drum bearings, and large sewage pumps.