RiverPool® by Sentry Pool Swim Current Gauge

The Hydraulic Gauge aka the "Swim Current Gauge", allows you to select the speed that is comfortable to you.

The gauge measures hydralic pressure in pounds per square inch (psi). Once you learn the appropriate speeds for your warm up, interval training, speed training, endurance training and your cool down, you can design your own personalized workout schedules using the same gauge settings for each swim set.