The Saltdip is a digital salt reader designed to make measuring your salt TDS easy. Until now, other products which claimed to be similar really didn’t give the user the ability to measure the TDS with such accuracy. The Saltdip doesn’t require any test strips to work. Simply collect the water sample from the pool or spa using the onboard cup and press the Start button to take your measurement. It’s smart, simple, and gives you results in seconds.