Bently Nevada 3305/00-02-CN

Product Name
3300 XL Velomitor Piezo-velocity Sensor, M8×1 thread, CNEx approval for China
Product Introduction
The 330500-02-CN is a solid-state piezo-electric velocity sensor that merges an accelerometer with an internal integrating amplifier to deliver a direct velocity signal. Housed in a laser-welded 316 L stainless-steel capsule, it measures absolute bearing-housing or casing vibration on critical rotating and reciprocating machinery. The sensor is hermetically sealed, immune to EMI/RFI, and carries CNEx certification for hazardous-area installations throughout China.
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
Category:
Description
  • Transverse Sensitivity: ≤5 % of axial
  • 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: –40 °C to +85 °C (–40 °F to +185 °F)
  • Storage Temperature: –55 °C to +125 °C
  • Shock Survivability: 5 000 g peak
  • Ingress Protection: IP67
  • Housing Material: 316 L stainless steel, case-isolated
  • Mounting Thread: M8 × 1 integral stud
  • Connector: 2-pin MIL-C-5015, hermetic, gold-plated contacts
  • Weight: 142 g (5.0 oz)
  • Agency Approvals: CNEx (China), CE, RoHS
Functional Features
  • CNEx Certification: Certified for Zone 1/Zone 2 hazardous areas in China.
  • Solid-state Design: No moving parts, eliminating wear and extending service life.
  • Case-isolated Construction: Blocks 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 Interface: Two-wire, constant-current powered; direct connection to 3500/42M, 1900/65A, 2300/20 monitors.
  • Reverse-polarity & Short-circuit Protected: Survives wiring errors during installation.
  • M8×1 Stud: Single-point mounting with 46 kg·cm max torque maintains flat response to 5 kHz.
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 subject to salt fog
  • 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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