How To Accurately Measure Tension Loss

The calendar tells me today is January 11th, but the arrival of my Beers ERT 300 tells me it is Christmas morning.  Merry Christmas to me!

The ERT 300 is a small computerized device that measures Dynamic Tension (DT) of the stringbed.  Simply clip the ERT 300 to your strings, press the yellow button, and sit back and wait a few seconds for a DT reading.  To get technical on you, the ERT 300 uses electronic simulation of ball impact to measure and analyze vibration of the strings.  It measures DT which is defined as “ball power in kp (kilopond) required to deflect the stringbed 1 centimeter at the sweet spot (ball impact)”.

ERT 300 with Carrying Case

ERT 300 Fits in the Palm of My Hand

ERT 300 In Action

For my stringing clients, I’ll use this device in two ways:

1.  To ensure consistent stringjobs time after time

2.  To help them determine how much tension loss has occurred and when it is time to have their racquets re-strung

The ERT 300 isn’t just for stringers like me.  I highly recommend it to anyone serious about tennis.  Think about this…  If you’re not a string-breaker, wouldn’t you like to quit guessing when it is time to re-string?  Wouldn’t you like to know how much tension loss has occurred in your stringbed?  Wouldn’t you like to know that every time you get your racquet back from your stringer that the stringbed characteristics are the same every time? 

If you answered “yes” to any of these questions, then an ERT 300 may be something to consider.  It isn’t super expensive at approximately $170.  It is very small and can easily fit into your tennis bag and be with you on the court at all times.  And quite frankly, it’s pretty cool.

I’m thrilled to have my ERT 300.  You might be thrilled too.  Consider it.

Thanks for checking in.

DH