Bently Nevada 330505-02-02-02-00 Low Frequency Velocity Sensor

Overview

The Bently Nevada 330505-02-02-02-00 is a low-frequency velocity sensor. Engineers use it to monitor vibration in hydroelectric turbines and other slow-speed rotating machinery. This sensor measures absolute vibration relative to free space. Therefore, it effectively detects bearing housing, casing, or structural vibrations.

Technical Specifications

• Manufacturer: Bently Nevada

• Product Type: Low Frequency Velocity Sensor

Performance Characteristics

• Sensitivity: 20 mV/mm/s (508 mV/in/s) ±10%

• Frequency Response:

• 0.5 to 1000 Hz (30 to 60,000 cpm) ±3.0 dB

• 1 to 200 Hz (60 to 12,000 cpm) ±0.9 dB

• Amplitude Linearity: ±3% up to 102 mm/s (4 in/s) peak

• Velocity Range: 102 mm/s (4 in/s) peak

• Output Bias Voltage: -12 ±1 VDC

• Output Type: Voltage, directly proportional to vibration velocity

Mechanical and Electrical Design

• Technology: Two-wire, moving-coil with embedded signal conditioning

• Internal Mounting Thread: 3/8-24 UNF-2B

• Mounting Adapter: M8 x 1 thread included

• Mounting Angle (Option -02): 90° ± 5°

• Maximum Cable Length: 305 m (1000 ft) with no signal degradation

• Electrical Noise: Minimal, ensuring stable performance

Environmental Ratings

• Operating Temperature: -40°C to +100°C (-40°F to +212°F)

• Shock Survivability: 981 m/s² (100g) peak

• Humidity Resistance: Up to 100% non-submerged (hermetically sealed)

Configuration Breakdown

• 330505: Low Frequency Velocity Sensor (Model)

• -02: Transducer Mounting Angle = 90° ± 5°

• -02: Internal Mounting Thread = 3/8-24 UNF-2B

• -02: Mounting Adapter Option = M8 x 1

• -00: No agency approval required