330505-01-02-03 Bently Nevada 3300 Series Vibration Transducer

Overview

The 330505-01-02-03 is a specialized Low Frequency Velocity Sensor from Bently Nevada, designed to provide accurate vibration data for slow-speed rotating machinery. Featuring a hermetically sealed 300-series stainless steel case and a robust 2-pin Mil-C-5015 connector, this transducer excels in harsh industrial environments where low-frequency oscillation detection is critical for predictive maintenance.

Configuration Breakdown

• Base Model: 330505 — Low Frequency Velocity Sensor
  • Mounting Angle: -01 — 0° ± 10°
  • Internal Thread: -02 — 3/8-24 UNF-2B
  • Mounting Adapter: -03 — 1/4 - 28 UNF

Engineering Specifications

• Sensitivity: 20 mV/mm/s (508 mV/in/s) ±10%
• Frequency Response: 0.5—1000 Hz (±3.0 dB)
• Velocity Range: 102 mm/s (4 in/s) peak
• Bias Voltage: -12 ±1 VDC
• Shock Survivability: 981 m/s² (100g) peak
• Weight: < 375 grams

Comparison & Selection Guide

Compare with: 330505-03-02-00

• Differences: The 330505-03-02-00 variant utilizes a different mounting angle configuration compared to the 330505-01-02-03.
• Selection Advice: Ensure your mounting surface orientation matches the specific Transducer Mounting Angle option. For standard horizontal or vertical shafts, the 0° model is the industry default.

Global PLC Spare HUB's Insight

Our engineering team identifies the 330505-01-02-03 as the essential tool for monitoring equipment operating below standard speeds, such as cooling tower fans or large, slow-speed blowers. Its high sensitivity at 0.5 Hz allows it to capture incipient bearing faults or looseness that standard wide-band accelerometers often miss.

Equipment & Diagnostic Capabilities

• Target Equipment: Cooling towers, slow-speed gearboxes, reciprocating compressors, and industrial fans.
• Diagnostics: Ideal for detecting unbalance, misalignment, and structural looseness in low-speed environments.
• Signal Integrity: The hermetic sealing and high-quality connector ensure low noise floors, critical for diagnostic software platforms like Bently Nevada 3500/46M.

Logistics & Quality Assurance

• Shipping: Expedited global dispatch via FedEx, UPS, and DHL.
• Dispatch: Orders are processed within 24-48 hours.
• Warranty: Includes a 12-month factory quality performance warranty.

Technical FAQ

Q: Why is the 0.5 Hz frequency response important for slow-speed machines?
A: Standard accelerometers have high-pass filters that often attenuate signals below 10 Hz; this sensor maintains sensitivity down to 0.5 Hz, capturing the primary rotation frequency of very slow equipment.

Q: Can I use this sensor in a high-humidity environment?
A: Yes, the case is hermetically sealed and rated for up to 100% relative humidity, provided it remains non-submerged.

Q: What is the benefit of the -12V bias voltage?
A: The bias voltage allows the sensor to operate as an active device, enabling the detection of both positive and negative vibration cycles over long cable runs without signal degradation.

Q: How do I identify the signal polarity during installation?
A: Refer to the datasheet mapping: Pin A becomes positive relative to Pin B when motion occurs from the sensor base toward the top.

Q: Selection Advice: When is a Velocity Sensor preferred over an Accelerometer?
A: A velocity sensor is preferred when monitoring structural vibration where the damage threshold is consistent across a wide frequency range; it provides a measurement directly proportional to the destructive energy of the machine.

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