Description
Bently 16925‑20‑170
- Technical Specifications
- Operating principle: High‑frequency eddy‑current inductive sensing
- Measured target surface: Conductive metallic shaft material
- Cable configuration: Factory‑integrated fixed‑length shielded probe cable
- Operating temperature rating for probe body: Wide industrial machine‑mount temperature range
- Output dependency: Requires paired Proximitor for signal conditioning
- Functional Features: Non‑contact measurement eliminates mechanical wear between sensor and rotating component. Excellent high‑frequency dynamic response captures fast rotor vibration events. Operates reliably even when probe tip is surrounded by oil mist, steam and non‑conductive process contaminants. Compatible with Bently 3500 series racks and multiple generations of monitoring hardware. Provides static gap value and dynamic vibration waveform for both protection interlock and machinery fault diagnosis.
- Application Scenarios: Radial shaft vibration monitoring for steam turbines and centrifugal compressors; thrust bearing axial position monitoring; generator rotor displacement measurement. Deployed on high‑speed rotating equipment within power generation and petrochemical plants.
- Performance Parameters: High‑linearity voltage output within calibrated working gap range. Output voltage changes linearly corresponding to gap variation between probe tip and metal target. Good rejection capability against industrial electromagnetic field interference.
- Material Composition: Metal probe tip housing, precision wound internal sensing coil. High‑temperature resistant insulation materials for probe cable. Multi‑layer shielding construction inside extension cable.
- Structural Characteristics: Small‑diameter probe tip enclosing sensing coil. Integral multi‑strand shielded extension cable. External mounting thread on probe body for fitting into probe housing assembly.
- Working Principle: Matched Proximitor unit transmits high‑frequency radio‑frequency excitation signal to coil within probe tip. Alternating magnetic field radiates from probe coil and induces eddy‑current circulation on nearby conductive metal target surface. Eddy‑current effect changes coil impedance according to physical gap distance between probe tip and target shaft. Proximitor hardware converts impedance variation into linear DC output voltage representing gap magnitude.
- Installation Requirements: Install probe inside matching probe housing assembly. Adjust static working gap to sit within middle portion of probe linear measurement range. Target surface must be clean conductive metal; thick non‑conductive coating will disrupt measurement. Keep metallic debris away from probe tip. Never bend probe cable tighter than minimum cable bend radius.
- Usage Notes: Mechanical scratch or damage to probe tip coil will degrade or destroy performance. Avoid pushing probe tip into direct physical contact with rotating shaft. Factory‑fixed integral cable cannot be cut, spliced or modified on‑site. Inspect target shaft surface condition during unit overhaul. Re‑verify static gap reading after every machinery mechanical maintenance activity.
