The TH1000 is the world's Best vertical jump measuring device. It is a mechanical tester, that is easy to use and delivers very accurate measurements.

The Top Hopper TH1000 Measuring Device has become the "STANDARD" for measuring vertical jump height. The TH1000 is designed to deliver the most accurate, reliable and reproducible measurements on the market today. It will adjust from 5 feet (60 inches) to 12'3" (147 inches) from the ground. Since the measuring capability is entirely built into the TH1000, any mounting system can be used. You can make your own custom mounting system or purchase one of three mounts (Wall Mount, Floor Stand, Basketball Rim Mount), which are sold separately. All items are serviceable and can be easily replaced. The Top Hopper Measuring Device is delivered 100% assembled. It includes everything you see in the pictures. In the retracted position, the dimensions are 34" Tall x 12" Wide x 2.5" Deep.

Estimated retail value: $899.99

https://thetophopper.com/products/th1000 

If you're planning to be on-site at convention, check out The Top Hopper LLC's Booth #901 in the 2023 AVCA Convention Marketplace.