Sometimes you may want to set up 2 loops close to each other to measure speed at a certain point on the course, but it is important to know that a transponder has an internal dead time when it cannot be activated.
As such we suggest as a general guideline that the minimum distance between 2 loops is the MAX speed in km/h divided by 10. For example if you expect a max speed of 160 km/h (100mph) then a minimum distance of 16m between the 2 loops should be used.