General description The 8-in-1 pH Meter is a versatile and high-precision testing device designed for measuring pH, TDS, temperature, EC, salinity, ORP, SG, and H2 in various liquids. This meter ensures comprehensive water quality assessment, making it essential for maintaining healthy water conditions in drinking water, swimming pools, aquariums, and more. Technical specifications pH measurement range: 0-14 TDS measurement range: 0-200,000 ppm EC measurement range: 0-200,000 µS/cm Salinity measurement range: 0-20% ORP measurement range: ±1999 mV H2 measurement range: 0-2400 ppb SG measurement range: 1.000-1.222 Temperature measurement range: 0-60℃ Measurement allowed error: ±1-3 cm Installation Prepare three cups of 250 mL and pour in the buffer powder for calibration. Turn on the pH meter power supply. Press the MODE and CAL buttons simultaneously for about 6 seconds until the pH meter flashes three times to complete the calibration. Usage The pH meter can be used to test various