Find an amelirate version about ours dustproof under speed monitor SENSOR JET which become GYROJET, more small and more power, the GYROJET possess an integrated inductive detector from 6 to 6000 pulses/min and a preset under speed level, with a quick fitting to shaft and an anti-rotative flexible strap, the GYROJET will permit you to have a totaly control for the speed of your elevator.
