



Introduction
The Bently Nevada 3500/25M Keyphasor Module (149369-01) is a precision phase-reference component developed for the 3500 Series machinery protection and condition monitoring platform. From a machinery diagnostics standpoint, this module provides the critical timing and angular reference required for accurate rotor speed measurement and phase-correlated vibration analysis.
Rather than performing vibration measurement directly, the 3500/25M operates as a synchronization backbone within the monitoring system, ensuring that all related measurement channels share a stable and consistent Keyphasor reference. This capability is essential for high-confidence diagnostics of rotating machinery operating under demanding industrial conditions.
Technical Specifications
| Item | Description |
|---|---|
| Manufacturer | Bently Nevada |
| Product Series | 3500 Series |
| Model | 3500/25M Keyphasor Module |
| Order Number | 149369-01 |
| Module Type | Keyphasor Module |
| Functional Role | Rotor phase and speed reference generation |
| System Compatibility | Bently Nevada 3500 Monitoring Systems |
| Installation | Rack-mounted within 3500 chassis |
| Signal Interface | Tachometer or probe inputs, Keyphasor outputs |
| Dimensions | 241.3 × 24.4 × 103.1 mm (H × W × D) |
| Weight | Approx. 0.46 kg |
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