EG&G Rotron 034209 Low speed Warning Detector

🛠️ What it is

• This device acts as a programmable frequency switch, interpreting the fan’s speed output signal—typically from a Fan Performance Sensor (FPS)—and triggering a warning output (audible alarm or indicator light) if speed falls below a preset threshold.

✅ Applications & Usage

• Installed on industrial or aerospace fans, the detector monitors fan RPM:

  1. The FPS generates pulses proportional to rotation speed.

  2. The LSWD compares that frequency against a safety threshold.

  3. If speed drops too low (e.g., imminent fan failure), it switches on an alarm circuit.

• 🧩 Fit, Replacement & Integration

  • Voltage: Commonly 24–28 V DC, but some models support 16–48 V.

  • Compatibility: Ensure it correlates with your specific fan’s FPS output. Check whether the pinout and connector match.

  • Calibration: These units are often calibrated to specific alarm thresholds. Recalibration may require factory tools or a replacement from Rotron/AMETEK.