Description
Bently 74712-06-05-03-00
Technical Specifications
- Sensor Type: Two-Wire Velocity Seismic Sensor
- Part Number: 74712-06-05-03-00
- Technology: Moving Coil
- Output: Direct proportional voltage (mV/mm/s)
Functional Features
- Superior Shock Resistance: The moving-coil design significantly reduces sensitivity to shock or pulse excitation compared to solid-state velocity sensors.
- No External Power Required: Self-generating operation simplifies portable measurement applications and continuous monitoring setups.
- High-Temperature Tolerance: Rated for continuous operation up to +204°C (+400°F).
Application Scenarios
Ideal for monitoring casing vibration on steam turbines, compressors, fans, and pumps where absolute structural vibration must be measured in high-temperature or high-shock environments.
Performance Parameters
- Sensitivity: 25 mm/s (1 in/s) zero-to-peak ±5% at 100 Hz
- Frequency Response: From minimum operating frequency up to 1 kHz (60,000 cpm)
- Operating Temperature: -29°C to +204°C
Material Composition
Ruggedized metallic casing, high-temperature internal coil windings, and specialized high-temp cabling.
Structural Characteristics
Cylindrical seismic mass design with integrated threaded mounting base and shielded output cable.
Working Principle
Based on electromagnetic induction. A suspended moving coil within a magnetic field generates a voltage proportional to the velocity of the casing’s vibration as the sensor moves with the structure.
Installation Requirements
Must be rigidly mounted to a flat, machined surface on the bearing housing using the provided stud. Ensure the mounting surface is clean and free of debris.
Usage Precautions
Do not exceed the maximum operating temperature rating. Avoid mounting the sensor near high-frequency vibration sources to prevent signal aliasing.
