Digital Handheld TDS Meter with Thermometer

the TDS-3 is the most reliable and longest lasting meter of its kind. It has a wide range of 0-9990 ppm has a hold button to save readings until it automatically shuts off after 10 minutes of non-use. The built-in thermometer displays the temperature and also compensates TDS for differences in temperature. It takes only two batteries, which have extra long life and are very easy to change. TDS is shown in a large, easy-to-read display. It is simple to use and comes factory calibrated.