A slug detection and prevention apparatus 10 and method therefor, which includes a detector 1, high pass filter 2, low pass filter 3, half-wave rectifier 4, comparator 5, and relay 6. Detector 1, being an accelerometer, condenser microphone, or the like, is electrically connected to high pass filter...http://www.google.ca/patents/US4884412?utm_source=gb-gplus-sharePatent US4884412 - Compressor slugging protection device and method therefor
