Bently Nevada 3304/00-02-05

Product Introduction
The 330400-02-05 is a rugged, case-isolated piezoelectric accelerometer designed for continuous casing-acceleration monitoring on critical rotating and reciprocating machinery. It delivers 100 mV/g sensitivity over a 50 g peak range and meets API 670 requirements for accelerometer performance. The hermetically sealed 316 L stainless-steel housing and IP68 rating ensure long-term reliability in extreme humidity, dust and offshore salt-laden atmospheres, while the integral M8×1 stud and 3-pin MIL-C-5015 connector provide fast, error-free installation.
Technical Specifications
  • Sensing Technology: Compression-type piezo-ceramic element, helium sealed
  • Sensitivity: 10.2 mV/m/s² (100 mV/g) ±5 %
  • Amplitude Range: ±490 m/s² (±50 g) peak
  • Frequency Response: 10 Hz – 15 kHz ±3 dB (600 – 900 000 cpm)
  • Mounted Resonant Frequency: ≥30 kHz
  • Transverse Sensitivity: ≤5 % of axial
  • Broad-band Noise Floor: 0.039 m/s² (0.004 g) rms (10 Hz – 15 kHz)
Category:
Description
  • Supply Requirement: 18 – 30 V dc constant-current, 2 – 4 mA IEPE drive
  • Output Bias Voltage: –8.5 ±0.5 V dc
  • Temperature Range: –55 °C to +121 °C operating; –55 °C to +155 °C storage
  • Temperature Sensitivity Drift: –11 % to +3 % typical over range
  • Shock Survivability: 5 000 g peak, 1 ms half-sine
  • Ingress Protection: IP68 (1.5 m, 48 h)
  • Housing Material: 316 L stainless steel, case-isolated
  • Mounting Thread: M8 × 1 integral stud, any orientation
  • Connector: 3-pin MIL-C-5015, gold-plated contacts
  • Weight: 100 g (3.5 oz)
  • Agency Approvals: ATEX, IECEx, CSA, CE, CNEx (China)
Functional Features
  • API 670 Compliant: Satisfies acceleration transducer requirements for machinery protection systems.
  • Case-Isolated Construction: Eliminates ground-loop noise and galvanic corrosion between machine and monitor.
  • Hermetic Sealing: Helium-filled sensing element welded in 316 L capsule for absolute moisture exclusion.
  • IEPE Interface: Two-wire, constant-current powered; direct connection to Bently Nevada 3500/1900 monitors or third-party systems.
  • Integral M8 Stud: Single-point mounting with 4 N·m torque maintains flat frequency response to 15 kHz.
  • Wide Frequency Band: Captures gear-mesh, blade-pass and bearing-impact signals from 10 Hz to 15 kHz.
  • Reverse-Polarity & Short-Circuit Protected: Survives wiring errors during installation.
  • Multi-Certified Intrinsically Safe: Ready for Zone 1/Zone 2 and Class I Div 1/Div 2 hazardous areas worldwide.
Application Scenarios
  • Gear-box casing vibration on steam and gas turbines
  • Centrifugal compressor skid vibration trending for API 614 compliance
  • Low-speed agitator and mixer bearing fault detection in chemical plants
  • Reciprocating engine and pump combustion knock measurement
  • Offshore platform cooling-tower fan structural health monitoring
  • Steel-mill rolling-stand gearbox tooth-mesh detection
  • Paper-machine dryer can HCF (High Cycle Fatigue) surveillance
  • Wind-turbine planetary gearbox and main bearing acceleration trending
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