4 In 1 Water Quality Test Pen PH/EC/TDS/TEMP Tester For Swimming Pool Drinkin GB
EC, TDS: ±2%F.S. The water quality tester is suitable for water sources, aquarium, hydroponics, hot springs, swimming pools and other water systems. EC: 0-19990us/cm 0-19.9ms/cm. PH: 0.00-14.00 PH. pH: 0.01PH.