LFS-2 Low Frequency Sensor Description The LFS sensor measures horizontal accelerations in two axes down to frequencies of about 0.2Hz. The sensor is placed directly on the floor and is used in a feed forward loop in combination with standard AVI/LP systems to increase the vibration isolation at very low frequencies. The LFS can be retro-fitted to existing AVI-LP systems. Image Gallery Click to open image! Click to open image! Click to open image!