Take Your Game to the Next Level with the ERT300

Whether you’re a stringer, player, or coach, the ERT300 is your essential tool for achieving consistent, high-performance results on court.

🎾 For Stringers

Consistency is the key to professional stringing. The ERT300 helps you maintain precision and reliability with every racket you service. By measuring the Dynamic Tension (DT), you can ensure that each job meets the same high standard every time.

💪 For Players

Your strings play a huge role in your performance. With the ERT300, you’ll always know whether your strings are still “on point” or when it’s time for a restring. Quick, accurate, and easy to use the ERT300 gives you instant feedback whenever you need it:

• Before stringing – to assess your racket’s current condition

• After stringing – to verify quality and consistency

• On court – to monitor string performance over time

🧠 For Coaches

Help your players stay at their best by guiding them on when to restring based on real data. The ERT300 empowers you to make informed recommendations, keeping every racket performing at its peak.

⚙️ What Does the ERT300 Measure?

The ERT300 measures Dynamic Tension (DT) the real tension of your stringbed as it plays. DT reflects all the factors that influence racket feel and control, including:

• Machine – the stringing machine used

• Strings – the type and material of the strings

• Racquet – the frame and string pattern

• Stringer – the technique and consistency of the person stringing

More details about the influences of the DT at the end of this blog.

DT VALUE – DEVIATIONS FROM EXPECTED RESULTS

Unlike static tension, DT is what truly matters on the court and the ERT300 gives you that information instantly.

📏 Easy to Use, Accurate, and Portable

Compact enough to fit in any racket bag, the ERT300 is designed for simplicity and precision. With the included DT conversion disc, you can quickly estimate the approximate tension in kg or lbs. While that conversion is not 100% exact, your DT measurement is always 100% accurate.

So trust your DT and trust your ERT300.