The Bently Nevada Model 330500-00-00 Velomitor Piezo-velocity Sensor is a heavy-duty industrial casing vibration transducer engineered and manufactured by Bently Nevada (a Baker Hughes business). Compliant with the American Petroleum Institute API 670 Standard, the 330500 Velomitor provides precise, continuous vibration monitoring for critical rotating machinery operating on rolling-element bearings, enabling early detection of unbalance, misalignment, mechanical looseness, and bearing raceway degradation.

Unlike traditional moving-coil electrodynamic velocity sensors that are vulnerable to mechanical wear, spring fatigue, and external magnetic interference, the 330500 incorporates a rugged piezoelectric ceramic sensing element coupled with internal solid-state electronic integration circuitry. The sensor measures acceleration and integrates it internally in real time to produce an AC output voltage directly proportional to vibration velocity, delivering a calibrated scale factor of 3.94 mV/mm/s (100 mV/in/s) across a broad frequency band of 4.5 Hz to 5.0 kHz.

Configuration Breakdown for Model 330500-00-00:
- 330500: Standard Velomitor Piezo-velocity Sensor.
- 00 (Mounting Thread Adapter Option): No mounting adapter included (Base tapped with 1/4-28 UNF internal thread).
- 00 (Agency Approval Option): Standard industrial unapproved version (No hazardous area certification required).

Enclosed in a hermetically sealed 316L stainless steel case rated to IP67 / NEMA 4X, the 330500-00-00 operates reliably in severe industrial environments with high dust, moisture, and chemical exposure across a temperature range of -55°C to +121°C. The top-exit 2-pin MIL-C-5015 connector provides secure electrical connection to Bently Nevada 3500/42M velocity monitors, 1900/65A standalone protection monitors, and Bently Nevada System 1 plant asset management platforms.

• Manufacturer: Bently Nevada (A Baker Hughes business)
• Product Line: Velomitor Piezo-velocity Vibration Transducers
• Full Model Number: 330500-00-00
• Detailed Model Specification:
  - Model 330500: Velomitor Piezo-velocity Sensor
  - Mounting Thread Option (Option AA: 00): No adapter (1/4-28 UNF internal mounting thread)
  - Agency Approval (Option BB: 00): Standard Industrial Version / Not Required (None)
• Sensing Principle: Piezoelectric crystal with internal solid-state integration circuitry
• Sensitivity / Scale Factor: 3.94 mV/mm/s (100 mV/in/s) ±5% at 100 Hz (6000 cpm) reference frequency
• Frequency Response:
  - 4.5 Hz to 5.0 kHz (270 cpm to 300,000 cpm) ±3.0 dB
  - 10.0 Hz to 1.0 kHz (600 cpm to 60,000 cpm) ±0.9 dB
• Maximum Amplitude Range: 1270 mm/s (50 in/s) peak
• Maximum Acceleration Capability: 490 m/s² (50 g) peak
• Amplitude Linearity: ±2% to 127 mm/s (5 in/s) peak
• Output Resistance: < 100 Ω
• Power Supply Requirements: Constant current source -24 VDC (-12 VDC to -30 VDC), 2.0 mA to 10.0 mA
• Output Bias Voltage: -12 VDC ±1 VDC
• Electrical Connector: Top-exit 2-pin MIL-C-5015 hermetic connector
• Enclosure Material: AISI 316L Stainless Steel (Hermetically sealed construction)
• Ingress Protection Rating: IP67 / NEMA 4X
• Mounting Orientation: Omnidirectional (can be mounted horizontally, vertically, or at any orientation)
• Operating Temperature Range: -55 °C to +121 °C (-67 °F to +250 °F)
• Storage Temperature Range: -55 °C to +121 °C (-67 °F to +250 °F)
• Shock Survivability: 5000 g peak maximum
• System Compatibility: Bently Nevada 3500/42M, 1900/65A monitors, Trendmaster Pro, and System 1 Software
• Industry Standards & Compliance: Fully compliant with API 670 Standard, CE, RoHS (Country of Origin: USA / China per Baker Hughes global facilities)