Our IMO computers employ a magnet and sensor fitted to one of the wheels which counts directly the revolutions. With cars for example it is difficult to find a safe reliable location on the wheel for the magnet and the sensor . The drive shaft is usually more accessible but it rotates at up to 4X the wheel rotation. Even with Quads the wheel size can be too small to set it on the IMO.We have designed a pulse splitter for these problems. You can use this to reduce (split) the pulses by factors of 2, 4, 8 and 16. This pulse splitter is simply connected to the sensor lead, the split factor is set and the IMO can be calibrated to show correct vehicle speed and distance.