Once-Per-Turn Reference with the 109549-01
The 109549-01 generates once-per-turn reference pulses for Bently Nevada machinery monitoring systems. This photoelectric probe detects a reflective target on the rotating shaft. Reliability engineers therefore use it for phase measurement, speed tracking, and balance calculations. Its threaded body mounts onto a bracket near the shaft without special adapters.
Detailed Technical Parameters
Pulse clarity defines the 109549-01, because the optical sensor responds to reflective tape targets with fast rise times. The probe emits a light beam and detects the returned reflection. Meanwhile, the sealed housing shields the optics from oil mist and dust. Review the essential specifications in the table below.
| Parameter | Specification |
|---|---|
| Function | Once-per-turn photoelectric reference probe |
| Sensing method | Reflective optical detection |
| Dimensions (W × H × D) | 25 × 60 × 25 mm |
| Weight | Approximately 0.12 kg |
| Interface | Integral cable with monitor rack connection |
| Component count | Light emitter plus photodetector element |
| Energy storage | None (probe powered by monitor) |
| Operating temperature | 0 °C to 100 °C |
Integration into Monitoring Systems
The 109549-01 mounts on a bracket and aligns with the reflective target on the shaft. Commissioning engineers adjust the gap during startup procedures. Consequently, phase reference channels return to service quickly after probe replacement. The optical sensor produces clean pulses across the full speed range. Furthermore, the sealed housing resists oil mist and dust on turbine decks.
Why Plants Choose This Probe
Many power stations still operate Bently Nevada systems for their proven machinery protection. Hence, the 109549-01 serves as a dependable spare for keeping reference channels online. Its standardized thread format simplifies stock management across multiple sites. In addition, the optical sensing method avoids electromagnetic interference issues. This probe keeps phase reference accurate and plant operations on schedule.
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