3500/25 Enhanced Keyphasor Module

The 3500/25 Enhanced Keyphasor Module provides the once-per-revolution (1/rev) timing reference required for synchronous vibration analysis on rotating machinery. Each module supports up to 2 channels and can be paired with eddy-current probes, magnetic pickups, or proximity probes.

For API 670 applications, redundant keyphasor modules are typically installed to provide continued timing reference during maintenance. The 3500/25 also provides the rotation direction signal to the 3500 rack for proper phase calculation.