Safedip is a digital chemistry reader designed to make measuring pool, hot tub and spa testing easy. Until now, other products which claimed to be similar really didn’t give the user the ability to measure so many parameters which such accuracy. The Safedip doesn’t require any test strips to work. Simply collect the water sample from the pool hot tub or spa using the onboard cup and press the Start button to take your measurement. It’s smart, simple, and gives you results in just seconds. Tests for Swimming Pools and Spas: · Free Chlorine · pH · Salinity · TDS · ORP · Temperature