eSeasongear SALT-3000 (TDS4TM-3000) Digital Electronic Salt Salinity Temperature Meter Tester --- NOT waterproof! *** Works ONLY for Salt Water Pool and Koi Fish Pond Salt level testing! *** Will NOT work for Sea/Marine/Salt Water Fish Tank Salt level testing! *** Will NOT work for Food salt level testing! *** Will NOT work for any other application! *** NOT waterproof! *** Please buy the SALT-3050 if you need a waterproof salt meter. *** Salt Range: 0-5000ppm or 0-0.5%; Temperature Range: 1-50 °C (New 2016 model display in F too!) *** Check out the picture to find out how to read the digital display: 300x10ppm = 3000ppm = 0.3% salt *** The SALT-3000 is precalibrated at 3000ppm salt so there is no calibration needed. *** This meter is equivalent to the KoiMedic Koi Medic Salt Meter. *** eSeasongear is a registered trademark of All Water Care, Inc.