2. Product Overview

Model Suffix Definition

• 330500: Base model of standard Velomitor velocity transducer
• -02: M8 internal threaded mounting hole (installation interface)
• -05: 5 meters factory pre-molded stainless steel armored shielded cable

Core Difference vs 330400 Series Accelerometer

1. Measurement physical quantity:
   • 330400/330425: Output acceleration (g), for high-frequency gear mesh, bearing fault detection
   • 330500: Direct output vibration velocity, for overall casing total vibration monitoring (API 670 standard main measurement parameter)
2. Frequency band: 330500 lower starting frequency (4.5Hz), better for low-frequency rotor unbalance, misalignment vibration capture
3. Power interface: 2-pin MIL connector (330400 is 3-pin IEPE)

3. Full Technical Specifications

• Brand: Bently Nevada (Baker Hughes)
• Model: 330500-02-05
• Warranty: 1 Year
• Condition: 100% New Original
• Sensing Principle: Piezoelectric accelerometer + built-in analog integration circuit (direct velocity output)
• Standard Sensitivity: 100 mV/in/s (3.94 mV/mm/s), tolerance ±5%
• Frequency Response: 4.5 Hz ~ 5000 Hz (±3dB); 6Hz~2500Hz (±0.9dB narrow band)
• Maximum Velocity Range: 1270 mm/s (50 in/s) peak
• Max Acceleration Overload: 50g peak
• Resonant Frequency: ＞15kHz
• Power Supply: 2~10mA constant current IEPE loop drive, DC bias 8~12V
• Connector: 2-pin hermetically sealed MIL-C-5015 aviation plug
• Mounting Interface: M8 internal blind threaded hole
• Integrated Cable: 5m stainless steel armored shielded cable
• Housing: 316L stainless steel, fully sealed IP68 protection
• Operating Temperature: -55℃ ~ +121℃
• Mechanical Shock Resistance: 5000g peak
• Max Extendable Cable Length: Up to 305m (1000ft) without signal attenuation
• Certifications: ATEX, IECEx, CSA Ex ia IIC T4, CE, API 670 compliant
• Compatible Systems: 3500 Machinery Protection System, 1900/65 monitor, Trendmaster Pro
• Remark: Active production mainstream model for turbomachinery casing absolute vibration protection

4. Application Scenarios

1. Thermal Power Plant Steam/Gas Turbine Generator Sets

   Install on turbine bearing pedestals, generator bearing housings and gearbox casings, collect overall vibration velocity signals for 3500 system alarm and safety trip interlock, monitor rotor unbalance, misalignment, loose foundation faults.

2. Petrochemical Centrifugal Compressor & Turboexpander Units

   Main measuring sensor for compressor casing absolute vibration, the core protection parameter required by API 617 compressor standard.

3. Heavy Industry Rotating Equipment Predictive Maintenance

   Large induced draft fans, blowers, industrial pumps, turboexpanders in metallurgy, coal and chemical plants for long-term equipment health online monitoring.

Bently Nevada Vibration Sensor Series Consolidated Update

1. Acceleration high-frequency sensors:

• 330400-01-05: 100mV/g, 50g, 1/4-28 UNF external thread, 5m cable
• 330400-02-05: 100mV/g, 50g, M8 internal thread, 5m cable
• 330425-02-05: 25mV/g wide range,75g, M8 internal thread,5m cable

2. Velocity overall vibration sensor:

• 330500-02-05: Velomitor direct velocity output, M8 thread, 5m armored cable

3. Matching extension cable: 167563-10 (10ft armored cable for 200350 seismic accelerometer)