8-in-1 Digital Water Tester Pen PH TDS TEMP ORP EC S.G H2 Monitor
ORP: ±1999 mV. TDS: 0–100,000 ppm. Hydrogen (H2): 0–2400 ppb. EC: 0–200,000 µS/cm. Monitor your water quality easily with this all-in-one digital tester pen. Ideal for pools, aquariums, and general water testing.