Cycling Cadence Sensor
A cadence sensor is a smart pod that measures RPMs or revolutions per minute or cadence. The sensor attaches to the bike crank arm to track, display, and send the data about the RPMs. Using the Heart Zones System this data can be displayed on the Big Board and on a bike computer or console attached to the bike handlebars. The data is the number of times per minute that the crank arm turns.