Bently Nevada 3305/00-00-02

Product Name
3300 XL Velomitor Piezo-velocity Sensor, 100 mV/in/s sensitivity, ATEX approval, ¼-28 UNF mount
Product Introduction
The 330500-00-02 is a solid-state piezo-electric velocity sensor that integrates an accelerometer and an internal integrating amplifier to deliver a direct velocity signal. Housed in a laser-welded 316 L stainless-steel capsule, it measures absolute casing vibration on rotating and reciprocating machinery across a wide frequency band. The sensor is hermetically sealed, immune to EMI/RFI, and certified for hazardous areas, making it ideal for continuous protection systems.
Technical Specifications
  • Sensing Principle: Compression-mode piezo-ceramic with internal integration
  • Sensitivity: 3.94 mV/mm/s (100 mV/in/s) ±5 %
  • Velocity Range: 0 – 1 270 mm/s (0 – 50 in/s) peak
  • Frequency Response: 4.5 Hz – 5 kHz (±3 dB)
  • Mounted Resonant Frequency: ≥30 kHz
  • Transverse Sensitivity: ≤5 % of axial
Category:
Description
  • Broad-band Noise Floor: 0.25 mm/s (0.01 in/s) rms
  • Supply Requirement: 18 – 30 V dc, 2 – 10 mA constant-current IEPE
  • Output Bias Voltage: 10 – 14 V dc
  • Operating Temperature: –54 °C to +121 °C (–65 °F to +250 °F)
  • Shock Survivability: 5 000 g peak
  • Ingress Protection: IP67
  • Housing Material: 316 L stainless steel, case-isolated
  • Mounting Thread: ¼-28 UNF integral stud
  • Connector: 2-pin MIL-C-5015, hermetic, gold-plated contacts
  • Weight: 150 g (5.3 oz)
  • Agency Approvals: ATEX / IECEx Ex ia IIC T4 Ga, CSA Class I Div 1, CE, RoHS

Functional Features
  • Solid-state Design: No moving parts, eliminating wear and extending service life.
  • Case-isolated Construction: Prevents ground-loop currents and galvanic corrosion.
  • Hermetic Sealing: Laser-welded capsule withstands 100 % humidity and salt-laden offshore air.
  • Wide Frequency Band: Captures low-speed imbalance (4.5 Hz) and high-frequency bearing impacts (5 kHz) in one sensor.
  • IEPE Output: Two-wire, constant-current powered; direct connection to 3500/42M, 1900/65A, 2300/20 monitors.
  • Reverse-polarity & Short-circuit Protected: Survives wiring errors during commissioning.
  • ATEX Certified Intrinsically Safe: Ready for Zone 0/Zone 1 installations worldwide.
Application Scenarios
  • Absolute casing vibration on steam and gas turbine gearboxes
  • Centrifugal compressor skids per API 614
  • Low-speed agitators and mixers in chemical plants
  • Reciprocating engine and pump frame vibration
  • Offshore platform cooling-tower fans
  • Steel-mill rolling-stand gearbox tooth-mesh detection
  • Paper-machine dryer can HCF surveillance
  • Wind-turbine planetary gearbox and main bearing velocity trending
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