PH200: This handheld tester measures PH and Temperature. Digital readout with waterproof housing. Auto-off, data hold, low battery indicator, batteries and buffer solution are standard features. Range is 0-14 PH and 0 Deg. to 80 Deg. C. (32 Deg. to 150 Deg. F.)

COM100: This highly accurate handheld tester measures TDS, Temperature and Conductivity. Digital readout with waterproof housing. Auto-off, data hold and low battery indicator and batteries are standard features. Accurate to + or - 2%. TDS range from 0-8560 ppm and temperature 0 Deg. to 80 Deg. C. (32 Deg. - 150 Deg. F.)

TDS4: Handheld TDS Tester. Economical yet accurate to + or - 2%. Range is 0-9990 ppm. Easy-to-read, digital display.