17/04/2014
For sale.
Polar’s CS600 with Power offers a unique way of measuring power output on a bicycle. In contrast to direct-measurement units such as Quarq, SRM or Powertap which use integrated strain gauges – or even indirect ones such as iBike which back-calculate power by measuring opposing forces – the CS600 displays power based on two key elements: chain tension and chain speed. It then calculates the vibrational frequency of the chain – and thus chain tension – and derives power output from there.
http://www.bikeradar.com/gear/category/accessories/gadgets/cycle-computers/product/review-polar-cs600-cycling-computer-with-power-output-sensor-17033/
