String meter ERT 300 Tennis String Tester

ERT 300 Tennis String Tester Tension Meter

Manufactured in Switzerland, the electronic ERT-300 meter is a reliable device that allows you to check the string tension on a racket at any time. It measures the dynamic tension (DT) of the entire string bed on the racket head - and a dynamic force properly matched to your playing style allows you to fully utilise the potential of the racket, strings and player's skills.

Precise measurement with the ERT 300 device

•  decide whether the strings already need replacing;
•  check whether the racket has been strung correctly by the stringer; 
•  be certain that all of a player's rackets are strung identically or with the planned tension;
•  determine the string tension at which the player plays best.